eBPF compatibility with custom and hardened kernels (xanmod, liquorix, etc)

[gustavo-iniguez-goya]

We've had several issues in the past regarding compatibility with this type of kernels and eBPF.

Custom kernels (xanmod, liquorix, others)

In order to use eBPF as process monitor method, the kernel must have some features enabled:

Basic:

• CONFIG_FTRACE=y
  (Without this option, the path /sys/kernel/debug/tracing/ is not created.)
• CONFIG_KPROBES=y , CONFIG_KPROBES_ON_FTRACE=y, CONFIG_HAVE_KPROBES=y , CONFIG_HAVE_KPROBES_ON_FTRACE=y, CONFIG_KPROBE_EVENTS=y

Additionally:

• CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
• CONFIG_FTRACE_SYSCALLS=y
  (Without these options, opensnitch-procs.o module will fail)

Extras:

• CONFIG_UPROBE_EVENTS=y
  (Without this option, the path /sys/kernel/debug/tracing/uprobe_events is not created. Thus the opensnitch-dns.o module, and any other that hooks userland libs won't work.)

You can check these options out with the following command: $ grep FTRACE /boot/config-$(uname -r) (or KPROBE, etc)

On the other hand, the path /sys/kernel/debug/tracing/kprobe_events must exist. Usually it's created when debugfs is mounted.
Since version 1.6.0rc2 opensnitch will try to mount it (some distros like devuan do not mount it by default). If we fail to mount it, then much probably one of the mentioned kernel features is not enabled.

• xanmod kernels:
  CONFIG_FTRACE is not set, thus ebpf proc monitor method doesn't work.

• liquorix kernels:
  ebpf proc monitor method works partially: connections are intercepted, but new/exit processes don't (CONFIG_FTRACE_SYSCALLS not set).
  DNS passive requests interception doesn't work either (CONFIG_UPROBE_EVENTS not set).

• Arch / Manjaro hardened kernels (as of 29/10/2023)
  /sys/kernel/debug/tracing/ path does not exist, thus we cannot configure kprobes or tracepoints. See this comment: eBPF compatibility with custom and hardened kernels (xanmod, liquorix, etc) #774 (comment)

Hardened kernels / systems

There're some configurable kernel options that prevent us from working as expected (eBPF only, AFAIK). #767
In particular these scripts seem to block some eBPF features: https://github.com/Kicksecure/security-misc#enhances-miscellaneous-security-settings

One of these options is lockdown=confidentiality:

tjbbjt said:
Removing lockdown=confidentiality from grub boot parameters fixed eBPF disabling for me.

(thank you @tjbbjt for reporting this!)

---

What happen if eBPF is not supported

We fallback to proc monitor method. Starting from v1.6.0rc3 you'll receive an alert on the desktop. If you want to stop seeing those alerts: 1) you can change proc monitor method to proc (Preferences -> Nodes), or 2) run a kernel with needed requirements.

For example, a desktop notification alerting that opensnitch-procs.o failed loading on liquorix kernel:

---

For iptables rules to work, you need at least this option enabled in your kernel configuration:

CONFIG_NETFILTER_XT_TARGET_NFQUEUE=y

[Danny3]

Good that now an alert / notification will be shown to better explain what the problem is!

Maybe a link to this page or some page on the documentation with all these explanations could be added.

[gustavo-iniguez-goya]

liquorix kernels:
ebpf proc monitor method works partially: connections are intercepted, but new/exit processes don't > (CONFIG_FTRACE_SYSCALLS not set).

Starting from the next version (> v1.6.3), if the ebpf proc monitor doesn't work we'll fallback to PROC CONNECTOR: 7a9bb17

[moisesmsf]

Hi,

Getting warning message: "Unable to set new process monitor (ebpf) method from disk: exit status 32. Unable to access debugfs filesystem, needed for eBPF to work, likely caused by a hardened or customized kernel. Change process monitor method to 'proc' to stop receiving this alert"

How to resolve this warning message in Archlinux Hardened kernel without change process monitor method to 'proc'?

SPECS:
Linux station 6.5.7-hardened1-1-hardened #1 SMP PREEMPT_DYNAMIC Wed, 11 Oct 2023 17:20:19 +0000 x86_64 GNU/Linux

opensnitchd --version
1.6.2

pacman --query | grep opensnitch
opensnitch 1.6.3-1

Gnome 45 (Wayland)

Check requirements:

SYSCTL: (sorry for the dump, I don't know which parameter is actually important)
[r@station ~]$ sudo sysctl -a
abi.vsyscall32 = 1
debug.exception-trace = 1
debug.kprobes-optimization = 1
dev.hpet.max-user-freq = 64
dev.mac_hid.mouse_button2_keycode = 97
dev.mac_hid.mouse_button3_keycode = 100
dev.mac_hid.mouse_button_emulation = 0
dev.scsi.logging_level = 0
dev.tty.ldisc_autoload = 0
dev.tty.legacy_tiocsti = 0
dev.tty.tiocsti_restrict = 1
fs.aio-max-nr = 1048576
fs.aio-nr = 0
fs.binfmt_misc.status = enabled
fs.dentry-state = 44328 24012 45 0 5635 0
fs.device_sidechannel_restrict = 1
fs.dir-notify-enable = 1
fs.epoll.max_user_watches = 13696779
fs.fanotify.max_queued_events = 16384
fs.fanotify.max_user_groups = 128
fs.fanotify.max_user_marks = 468787
fs.file-max = 9223372036854775807
fs.file-nr = 7616 0 9223372036854775807
fs.inode-nr = 38778 404
fs.inode-state = 38778 404 0 0 0 0 0
fs.inotify.max_queued_events = 16384
fs.inotify.max_user_instances = 1024
fs.inotify.max_user_watches = 524288
fs.lease-break-time = 45
fs.leases-enable = 1
fs.mount-max = 100000
fs.mqueue.msg_default = 10
fs.mqueue.msg_max = 10
fs.mqueue.msgsize_default = 8192
fs.mqueue.msgsize_max = 8192
fs.mqueue.queues_max = 256
fs.nr_open = 1073741816
fs.overflowgid = 65534
fs.overflowuid = 65534
fs.pipe-max-size = 1048576
fs.pipe-user-pages-hard = 0
fs.pipe-user-pages-soft = 16384
fs.protected_fifos = 1
fs.protected_hardlinks = 1
fs.protected_regular = 1
fs.protected_symlinks = 1
fs.quota.allocated_dquots = 0
fs.quota.cache_hits = 0
fs.quota.drops = 0
fs.quota.free_dquots = 0
fs.quota.lookups = 0
fs.quota.reads = 0
fs.quota.syncs = 0
fs.quota.writes = 0
fs.suid_dumpable = 2
fs.verity.require_signatures = 0
kernel.acct = 4 2 30
kernel.acpi_video_flags = 0
kernel.arch = x86_64
kernel.auto_msgmni = 0
kernel.bootloader_type = 33
kernel.bootloader_version = 1
kernel.bpf_stats_enabled = 0
kernel.cad_pid = 1
kernel.cap_last_cap = 40
kernel.core_pattern = |/usr/lib/systemd/systemd-coredump %P %u %g %s %t %c %h
kernel.core_pipe_limit = 16
kernel.core_uses_pid = 1
kernel.ctrl-alt-del = 0
kernel.deny_new_usb = 0
kernel.dmesg_restrict = 1
kernel.domainname = (none)
kernel.ftrace_dump_on_oops = 0
kernel.ftrace_enabled = 1
kernel.hardlockup_all_cpu_backtrace = 0
kernel.hardlockup_panic = 0
kernel.hostname = station
kernel.hung_task_all_cpu_backtrace = 0
kernel.hung_task_check_count = 4194304
kernel.hung_task_check_interval_secs = 0
kernel.hung_task_panic = 0
kernel.hung_task_timeout_secs = 120
kernel.hung_task_warnings = 10
kernel.io_delay_type = 0
kernel.keys.gc_delay = 300
kernel.keys.maxbytes = 20000
kernel.keys.maxkeys = 200
kernel.keys.persistent_keyring_expiry = 259200
kernel.keys.root_maxbytes = 25000000
kernel.keys.root_maxkeys = 1000000
kernel.kptr_restrict = 2
kernel.latencytop = 0
kernel.max_lock_depth = 1024
kernel.max_rcu_stall_to_panic = 0
kernel.modprobe = /sbin/modprobe
kernel.modules_disabled = 0
kernel.msgmax = 8192
kernel.msgmnb = 16384
kernel.msgmni = 32000
kernel.ngroups_max = 65536
kernel.nmi_watchdog = 1
kernel.numa_balancing = 0
kernel.numa_balancing_promote_rate_limit_MBps = 65536
kernel.oops_all_cpu_backtrace = 0
kernel.oops_limit = 10000
kernel.osrelease = 6.5.7-hardened1-1-hardened
kernel.ostype = Linux
kernel.overflowgid = 65534
kernel.overflowuid = 65534
kernel.panic = 0
kernel.panic_on_io_nmi = 0
kernel.panic_on_oops = 1
kernel.panic_on_rcu_stall = 0
kernel.panic_on_unrecovered_nmi = 0
kernel.panic_on_warn = 0
kernel.panic_print = 0
kernel.perf_cpu_time_max_percent = 25
kernel.perf_event_max_contexts_per_stack = 8
kernel.perf_event_max_sample_rate = 100000
kernel.perf_event_max_stack = 127
kernel.perf_event_mlock_kb = 516
kernel.perf_event_paranoid = 3
kernel.pid_max = 4194304
kernel.poweroff_cmd = /sbin/poweroff
kernel.print-fatal-signals = 0
kernel.printk = 4 4 1 4
kernel.printk_delay = 0
kernel.printk_devkmsg = on
kernel.printk_ratelimit = 5
kernel.printk_ratelimit_burst = 10
kernel.pty.max = 4096
kernel.pty.nr = 2
kernel.pty.reserve = 1024
kernel.random.boot_id = d6eb7807-41c5-4e57-948d-2ceb49603359
kernel.random.entropy_avail = 256
kernel.random.poolsize = 256
kernel.random.urandom_min_reseed_secs = 60
kernel.random.uuid = 980bd9c5-6ca7-40ea-918c-0b8a12bec865
kernel.random.write_wakeup_threshold = 256
kernel.randomize_va_space = 2
kernel.real-root-dev = 0
kernel.sched_autogroup_enabled = 1
kernel.sched_cfs_bandwidth_slice_us = 5000
kernel.sched_child_runs_first = 0
kernel.sched_deadline_period_max_us = 4194304
kernel.sched_deadline_period_min_us = 100
kernel.sched_energy_aware = 1
kernel.sched_rr_timeslice_ms = 100
kernel.sched_rt_period_us = 1000000
kernel.sched_rt_runtime_us = 950000
kernel.sched_schedstats = 0
kernel.sched_util_clamp_max = 1024
kernel.sched_util_clamp_min = 1024
kernel.sched_util_clamp_min_rt_default = 1024
kernel.seccomp.actions_avail = kill_process kill_thread trap errno user_notif trace log allow
kernel.seccomp.actions_logged = kill_process kill_thread trap errno user_notif trace log
kernel.sem = 32000 1024000000 500 32000
kernel.shm_rmid_forced = 0
kernel.shmall = 18446744073692774399
kernel.shmmax = 18446744073692774399
kernel.shmmni = 4096
kernel.soft_watchdog = 1
kernel.softlockup_all_cpu_backtrace = 0
kernel.softlockup_panic = 0
kernel.split_lock_mitigate = 1
kernel.stack_tracer_enabled = 0
kernel.sysctl_writes_strict = 1
kernel.sysrq = 16
kernel.tainted = 131072
kernel.task_delayacct = 0
kernel.threads-max = 480692
kernel.timer_migration = 1
kernel.traceoff_on_warning = 0
kernel.tracepoint_printk = 0
kernel.unknown_nmi_panic = 0
kernel.unprivileged_bpf_disabled = 2
kernel.unprivileged_userns_clone = 0
kernel.usermodehelper.bset = 4294967295 511
kernel.usermodehelper.inheritable = 4294967295 511
kernel.version = #1 SMP PREEMPT_DYNAMIC Wed, 11 Oct 2023 17:20:19 +0000
kernel.warn_limit = 0
kernel.watchdog = 1
kernel.watchdog_cpumask = 0-15
kernel.watchdog_thresh = 10
kernel.yama.ptrace_scope = 1
net.core.bpf_jit_enable = 1
net.core.bpf_jit_harden = 2
net.core.bpf_jit_kallsyms = 1
net.core.bpf_jit_limit = 528482304
net.core.busy_poll = 0
net.core.busy_read = 0
net.core.default_qdisc = fq_codel
net.core.dev_weight = 64
net.core.dev_weight_rx_bias = 1
net.core.dev_weight_tx_bias = 1
net.core.devconf_inherit_init_net = 0
net.core.fb_tunnels_only_for_init_net = 0
net.core.flow_limit_cpu_bitmap = 0000
net.core.flow_limit_table_len = 4096
net.core.gro_normal_batch = 8
net.core.high_order_alloc_disable = 0
net.core.max_skb_frags = 17
net.core.message_burst = 10
net.core.message_cost = 5
net.core.netdev_budget = 300
net.core.netdev_budget_usecs = 6666
net.core.netdev_max_backlog = 1000
net.core.netdev_rss_key = 00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00
net.core.netdev_tstamp_prequeue = 1
net.core.netdev_unregister_timeout_secs = 10
net.core.optmem_max = 20480
net.core.rmem_default = 212992
net.core.rmem_max = 2621440
net.core.rps_default_mask = 0000
net.core.rps_sock_flow_entries = 0
net.core.skb_defer_max = 64
net.core.somaxconn = 4096
net.core.tstamp_allow_data = 1
net.core.txrehash = 1
net.core.warnings = 0
net.core.wmem_default = 212992
net.core.wmem_max = 2621440
net.core.xfrm_acq_expires = 30
net.core.xfrm_aevent_etime = 10
net.core.xfrm_aevent_rseqth = 2
net.core.xfrm_larval_drop = 1
net.ipv4.cipso_cache_bucket_size = 10
net.ipv4.cipso_cache_enable = 1
net.ipv4.cipso_rbm_optfmt = 0
net.ipv4.cipso_rbm_strictvalid = 1
net.ipv4.conf.all.accept_local = 0
net.ipv4.conf.all.accept_redirects = 1
net.ipv4.conf.all.accept_source_route = 0
net.ipv4.conf.all.arp_accept = 0
net.ipv4.conf.all.arp_announce = 0
net.ipv4.conf.all.arp_evict_nocarrier = 1
net.ipv4.conf.all.arp_filter = 0
net.ipv4.conf.all.arp_ignore = 0
net.ipv4.conf.all.arp_notify = 0
net.ipv4.conf.all.bc_forwarding = 0
net.ipv4.conf.all.bootp_relay = 0
net.ipv4.conf.all.disable_policy = 0
net.ipv4.conf.all.disable_xfrm = 0
net.ipv4.conf.all.drop_gratuitous_arp = 0
net.ipv4.conf.all.drop_unicast_in_l2_multicast = 0
net.ipv4.conf.all.force_igmp_version = 0
net.ipv4.conf.all.forwarding = 0
net.ipv4.conf.all.igmpv2_unsolicited_report_interval = 10000
net.ipv4.conf.all.igmpv3_unsolicited_report_interval = 1000
net.ipv4.conf.all.ignore_routes_with_linkdown = 0
net.ipv4.conf.all.log_martians = 0
net.ipv4.conf.all.mc_forwarding = 0
net.ipv4.conf.all.medium_id = 0
net.ipv4.conf.all.promote_secondaries = 0
net.ipv4.conf.all.proxy_arp = 0
net.ipv4.conf.all.proxy_arp_pvlan = 0
net.ipv4.conf.all.route_localnet = 0
net.ipv4.conf.all.rp_filter = 0
net.ipv4.conf.all.secure_redirects = 1
net.ipv4.conf.all.send_redirects = 1
net.ipv4.conf.all.shared_media = 1
net.ipv4.conf.all.src_valid_mark = 0
net.ipv4.conf.all.tag = 0
net.ipv4.conf.default.accept_local = 0
net.ipv4.conf.default.accept_redirects = 1
net.ipv4.conf.default.accept_source_route = 0
net.ipv4.conf.default.arp_accept = 0
net.ipv4.conf.default.arp_announce = 0
net.ipv4.conf.default.arp_evict_nocarrier = 1
net.ipv4.conf.default.arp_filter = 0
net.ipv4.conf.default.arp_ignore = 0
net.ipv4.conf.default.arp_notify = 0
net.ipv4.conf.default.bc_forwarding = 0
net.ipv4.conf.default.bootp_relay = 0
net.ipv4.conf.default.disable_policy = 0
net.ipv4.conf.default.disable_xfrm = 0
net.ipv4.conf.default.drop_gratuitous_arp = 0
net.ipv4.conf.default.drop_unicast_in_l2_multicast = 0
net.ipv4.conf.default.force_igmp_version = 0
net.ipv4.conf.default.forwarding = 0
net.ipv4.conf.default.igmpv2_unsolicited_report_interval = 10000
net.ipv4.conf.default.igmpv3_unsolicited_report_interval = 1000
net.ipv4.conf.default.ignore_routes_with_linkdown = 0
net.ipv4.conf.default.log_martians = 0
net.ipv4.conf.default.mc_forwarding = 0
net.ipv4.conf.default.medium_id = 0
net.ipv4.conf.default.promote_secondaries = 1
net.ipv4.conf.default.proxy_arp = 0
net.ipv4.conf.default.proxy_arp_pvlan = 0
net.ipv4.conf.default.route_localnet = 0
net.ipv4.conf.default.rp_filter = 2
net.ipv4.conf.default.secure_redirects = 1
net.ipv4.conf.default.send_redirects = 1
net.ipv4.conf.default.shared_media = 1
net.ipv4.conf.default.src_valid_mark = 0
net.ipv4.conf.default.tag = 0
net.ipv4.conf.enp2s0.accept_local = 0
net.ipv4.conf.enp2s0.accept_redirects = 1
net.ipv4.conf.enp2s0.accept_source_route = 0
net.ipv4.conf.enp2s0.arp_accept = 0
net.ipv4.conf.enp2s0.arp_announce = 0
net.ipv4.conf.enp2s0.arp_evict_nocarrier = 1
net.ipv4.conf.enp2s0.arp_filter = 0
net.ipv4.conf.enp2s0.arp_ignore = 0
net.ipv4.conf.enp2s0.arp_notify = 0
net.ipv4.conf.enp2s0.bc_forwarding = 0
net.ipv4.conf.enp2s0.bootp_relay = 0
net.ipv4.conf.enp2s0.disable_policy = 0
net.ipv4.conf.enp2s0.disable_xfrm = 0
net.ipv4.conf.enp2s0.drop_gratuitous_arp = 0
net.ipv4.conf.enp2s0.drop_unicast_in_l2_multicast = 0
net.ipv4.conf.enp2s0.force_igmp_version = 0
net.ipv4.conf.enp2s0.forwarding = 0
net.ipv4.conf.enp2s0.igmpv2_unsolicited_report_interval = 10000
net.ipv4.conf.enp2s0.igmpv3_unsolicited_report_interval = 1000
net.ipv4.conf.enp2s0.ignore_routes_with_linkdown = 0
net.ipv4.conf.enp2s0.log_martians = 0
net.ipv4.conf.enp2s0.mc_forwarding = 0
net.ipv4.conf.enp2s0.medium_id = 0
net.ipv4.conf.enp2s0.promote_secondaries = 1
net.ipv4.conf.enp2s0.proxy_arp = 0
net.ipv4.conf.enp2s0.proxy_arp_pvlan = 0
net.ipv4.conf.enp2s0.route_localnet = 0
net.ipv4.conf.enp2s0.rp_filter = 2
net.ipv4.conf.enp2s0.secure_redirects = 1
net.ipv4.conf.enp2s0.send_redirects = 1
net.ipv4.conf.enp2s0.shared_media = 1
net.ipv4.conf.enp2s0.src_valid_mark = 0
net.ipv4.conf.enp2s0.tag = 0
net.ipv4.conf.lo.accept_local = 0
net.ipv4.conf.lo.accept_redirects = 1
net.ipv4.conf.lo.accept_source_route = 0
net.ipv4.conf.lo.arp_accept = 0
net.ipv4.conf.lo.arp_announce = 0
net.ipv4.conf.lo.arp_evict_nocarrier = 1
net.ipv4.conf.lo.arp_filter = 0
net.ipv4.conf.lo.arp_ignore = 0
net.ipv4.conf.lo.arp_notify = 0
net.ipv4.conf.lo.bc_forwarding = 0
net.ipv4.conf.lo.bootp_relay = 0
net.ipv4.conf.lo.disable_policy = 1
net.ipv4.conf.lo.disable_xfrm = 1
net.ipv4.conf.lo.drop_gratuitous_arp = 0
net.ipv4.conf.lo.drop_unicast_in_l2_multicast = 0
net.ipv4.conf.lo.force_igmp_version = 0
net.ipv4.conf.lo.forwarding = 0
net.ipv4.conf.lo.igmpv2_unsolicited_report_interval = 10000
net.ipv4.conf.lo.igmpv3_unsolicited_report_interval = 1000
net.ipv4.conf.lo.ignore_routes_with_linkdown = 0
net.ipv4.conf.lo.log_martians = 0
net.ipv4.conf.lo.mc_forwarding = 0
net.ipv4.conf.lo.medium_id = 0
net.ipv4.conf.lo.promote_secondaries = 1
net.ipv4.conf.lo.proxy_arp = 0
net.ipv4.conf.lo.proxy_arp_pvlan = 0
net.ipv4.conf.lo.route_localnet = 0
net.ipv4.conf.lo.rp_filter = 2
net.ipv4.conf.lo.secure_redirects = 1
net.ipv4.conf.lo.send_redirects = 1
net.ipv4.conf.lo.shared_media = 1
net.ipv4.conf.lo.src_valid_mark = 0
net.ipv4.conf.lo.tag = 0
net.ipv4.conf.wlo1.accept_local = 0
net.ipv4.conf.wlo1.accept_redirects = 1
net.ipv4.conf.wlo1.accept_source_route = 0
net.ipv4.conf.wlo1.arp_accept = 0
net.ipv4.conf.wlo1.arp_announce = 0
net.ipv4.conf.wlo1.arp_evict_nocarrier = 1
net.ipv4.conf.wlo1.arp_filter = 0
net.ipv4.conf.wlo1.arp_ignore = 0
net.ipv4.conf.wlo1.arp_notify = 0
net.ipv4.conf.wlo1.bc_forwarding = 0
net.ipv4.conf.wlo1.bootp_relay = 0
net.ipv4.conf.wlo1.disable_policy = 0
net.ipv4.conf.wlo1.disable_xfrm = 0
net.ipv4.conf.wlo1.drop_gratuitous_arp = 0
net.ipv4.conf.wlo1.drop_unicast_in_l2_multicast = 0
net.ipv4.conf.wlo1.force_igmp_version = 0
net.ipv4.conf.wlo1.forwarding = 0
net.ipv4.conf.wlo1.igmpv2_unsolicited_report_interval = 10000
net.ipv4.conf.wlo1.igmpv3_unsolicited_report_interval = 1000
net.ipv4.conf.wlo1.ignore_routes_with_linkdown = 0
net.ipv4.conf.wlo1.log_martians = 0
net.ipv4.conf.wlo1.mc_forwarding = 0
net.ipv4.conf.wlo1.medium_id = 0
net.ipv4.conf.wlo1.promote_secondaries = 1
net.ipv4.conf.wlo1.proxy_arp = 0
net.ipv4.conf.wlo1.proxy_arp_pvlan = 0
net.ipv4.conf.wlo1.route_localnet = 0
net.ipv4.conf.wlo1.rp_filter = 2
net.ipv4.conf.wlo1.secure_redirects = 1
net.ipv4.conf.wlo1.send_redirects = 1
net.ipv4.conf.wlo1.shared_media = 1
net.ipv4.conf.wlo1.src_valid_mark = 0
net.ipv4.conf.wlo1.tag = 0
net.ipv4.fib_multipath_hash_fields = 7
net.ipv4.fib_multipath_hash_policy = 0
net.ipv4.fib_multipath_use_neigh = 0
net.ipv4.fib_notify_on_flag_change = 0
net.ipv4.fib_sync_mem = 524288
net.ipv4.fwmark_reflect = 0
net.ipv4.icmp_echo_enable_probe = 0
net.ipv4.icmp_echo_ignore_all = 0
net.ipv4.icmp_echo_ignore_broadcasts = 1
net.ipv4.icmp_errors_use_inbound_ifaddr = 0
net.ipv4.icmp_ignore_bogus_error_responses = 1
net.ipv4.icmp_msgs_burst = 50
net.ipv4.icmp_msgs_per_sec = 1000
net.ipv4.icmp_ratelimit = 1000
net.ipv4.icmp_ratemask = 6168
net.ipv4.igmp_link_local_mcast_reports = 1
net.ipv4.igmp_max_memberships = 20
net.ipv4.igmp_max_msf = 10
net.ipv4.igmp_qrv = 2
net.ipv4.inet_peer_maxttl = 600
net.ipv4.inet_peer_minttl = 120
net.ipv4.inet_peer_threshold = 65664
net.ipv4.ip_autobind_reuse = 0
net.ipv4.ip_default_ttl = 64
net.ipv4.ip_dynaddr = 0
net.ipv4.ip_early_demux = 1
net.ipv4.ip_forward = 0
net.ipv4.ip_forward_update_priority = 1
net.ipv4.ip_forward_use_pmtu = 0
net.ipv4.ip_local_port_range = 32768 60999
net.ipv4.ip_local_reserved_ports =
net.ipv4.ip_no_pmtu_disc = 0
net.ipv4.ip_nonlocal_bind = 0
net.ipv4.ip_unprivileged_port_start = 1024
net.ipv4.ipfrag_high_thresh = 4194304
net.ipv4.ipfrag_low_thresh = 3145728
net.ipv4.ipfrag_max_dist = 64
net.ipv4.ipfrag_secret_interval = 0
net.ipv4.ipfrag_time = 30
net.ipv4.neigh.default.anycast_delay = 99
net.ipv4.neigh.default.app_solicit = 0
net.ipv4.neigh.default.base_reachable_time_ms = 30000
net.ipv4.neigh.default.delay_first_probe_time = 5
net.ipv4.neigh.default.gc_interval = 30
net.ipv4.neigh.default.gc_stale_time = 60
net.ipv4.neigh.default.gc_thresh1 = 128
net.ipv4.neigh.default.gc_thresh2 = 512
net.ipv4.neigh.default.gc_thresh3 = 1024
net.ipv4.neigh.default.interval_probe_time_ms = 5000
net.ipv4.neigh.default.locktime = 99
net.ipv4.neigh.default.mcast_resolicit = 0
net.ipv4.neigh.default.mcast_solicit = 3
net.ipv4.neigh.default.proxy_delay = 79
net.ipv4.neigh.default.proxy_qlen = 64
net.ipv4.neigh.default.retrans_time_ms = 1000
net.ipv4.neigh.default.ucast_solicit = 3
net.ipv4.neigh.default.unres_qlen = 101
net.ipv4.neigh.default.unres_qlen_bytes = 212992
net.ipv4.neigh.enp2s0.anycast_delay = 99
net.ipv4.neigh.enp2s0.app_solicit = 0
net.ipv4.neigh.enp2s0.base_reachable_time_ms = 30000
net.ipv4.neigh.enp2s0.delay_first_probe_time = 5
net.ipv4.neigh.enp2s0.gc_stale_time = 60
net.ipv4.neigh.enp2s0.interval_probe_time_ms = 5000
net.ipv4.neigh.enp2s0.locktime = 99
net.ipv4.neigh.enp2s0.mcast_resolicit = 0
net.ipv4.neigh.enp2s0.mcast_solicit = 3
net.ipv4.neigh.enp2s0.proxy_delay = 79
net.ipv4.neigh.enp2s0.proxy_qlen = 64
net.ipv4.neigh.enp2s0.retrans_time_ms = 1000
net.ipv4.neigh.enp2s0.ucast_solicit = 3
net.ipv4.neigh.enp2s0.unres_qlen = 101
net.ipv4.neigh.enp2s0.unres_qlen_bytes = 212992
net.ipv4.neigh.lo.anycast_delay = 99
net.ipv4.neigh.lo.app_solicit = 0
net.ipv4.neigh.lo.base_reachable_time_ms = 30000
net.ipv4.neigh.lo.delay_first_probe_time = 5
net.ipv4.neigh.lo.gc_stale_time = 60
net.ipv4.neigh.lo.interval_probe_time_ms = 5000
net.ipv4.neigh.lo.locktime = 99
net.ipv4.neigh.lo.mcast_resolicit = 0
net.ipv4.neigh.lo.mcast_solicit = 3
net.ipv4.neigh.lo.proxy_delay = 79
net.ipv4.neigh.lo.proxy_qlen = 64
net.ipv4.neigh.lo.retrans_time_ms = 1000
net.ipv4.neigh.lo.ucast_solicit = 3
net.ipv4.neigh.lo.unres_qlen = 101
net.ipv4.neigh.lo.unres_qlen_bytes = 212992
net.ipv4.neigh.wlo1.anycast_delay = 99
net.ipv4.neigh.wlo1.app_solicit = 0
net.ipv4.neigh.wlo1.base_reachable_time_ms = 30000
net.ipv4.neigh.wlo1.delay_first_probe_time = 5
net.ipv4.neigh.wlo1.gc_stale_time = 60
net.ipv4.neigh.wlo1.interval_probe_time_ms = 5000
net.ipv4.neigh.wlo1.locktime = 99
net.ipv4.neigh.wlo1.mcast_resolicit = 0
net.ipv4.neigh.wlo1.mcast_solicit = 3
net.ipv4.neigh.wlo1.proxy_delay = 79
net.ipv4.neigh.wlo1.proxy_qlen = 64
net.ipv4.neigh.wlo1.retrans_time_ms = 1000
net.ipv4.neigh.wlo1.ucast_solicit = 3
net.ipv4.neigh.wlo1.unres_qlen = 101
net.ipv4.neigh.wlo1.unres_qlen_bytes = 212992
net.ipv4.nexthop_compat_mode = 1
net.ipv4.ping_group_range = 0 2147483647
net.ipv4.raw_l3mdev_accept = 1
net.ipv4.route.error_burst = 1500
net.ipv4.route.error_cost = 300
net.ipv4.route.gc_elasticity = 8
net.ipv4.route.gc_interval = 60
net.ipv4.route.gc_min_interval = 0
net.ipv4.route.gc_min_interval_ms = 500
net.ipv4.route.gc_thresh = -1
net.ipv4.route.gc_timeout = 300
net.ipv4.route.max_size = 2147483647
net.ipv4.route.min_adv_mss = 256
net.ipv4.route.min_pmtu = 552
net.ipv4.route.mtu_expires = 600
net.ipv4.route.redirect_load = 6
net.ipv4.route.redirect_number = 9
net.ipv4.route.redirect_silence = 6144
net.ipv4.tcp_abort_on_overflow = 0
net.ipv4.tcp_adv_win_scale = 1
net.ipv4.tcp_allowed_congestion_control = reno cubic
net.ipv4.tcp_app_win = 31
net.ipv4.tcp_autocorking = 1
net.ipv4.tcp_available_congestion_control = reno cubic
net.ipv4.tcp_available_ulp = espintcp mptcp
net.ipv4.tcp_base_mss = 1024
net.ipv4.tcp_challenge_ack_limit = 2147483647
net.ipv4.tcp_child_ehash_entries = 0
net.ipv4.tcp_comp_sack_delay_ns = 1000000
net.ipv4.tcp_comp_sack_nr = 44
net.ipv4.tcp_comp_sack_slack_ns = 100000
net.ipv4.tcp_congestion_control = cubic
net.ipv4.tcp_dsack = 1
net.ipv4.tcp_early_demux = 1
net.ipv4.tcp_early_retrans = 3
net.ipv4.tcp_ecn = 2
net.ipv4.tcp_ecn_fallback = 1
net.ipv4.tcp_ehash_entries = 524288
net.ipv4.tcp_fack = 0
net.ipv4.tcp_fastopen = 1
net.ipv4.tcp_fastopen_blackhole_timeout_sec = 0
net.ipv4.tcp_fastopen_key = 00000000-00000000-00000000-00000000
net.ipv4.tcp_fin_timeout = 60
net.ipv4.tcp_frto = 2
net.ipv4.tcp_fwmark_accept = 0
net.ipv4.tcp_invalid_ratelimit = 500
net.ipv4.tcp_keepalive_intvl = 75
net.ipv4.tcp_keepalive_probes = 9
net.ipv4.tcp_keepalive_time = 7200
net.ipv4.tcp_l3mdev_accept = 0
net.ipv4.tcp_limit_output_bytes = 1048576
net.ipv4.tcp_low_latency = 0
net.ipv4.tcp_max_orphans = 262144
net.ipv4.tcp_max_reordering = 300
net.ipv4.tcp_max_syn_backlog = 4096
net.ipv4.tcp_max_tw_buckets = 262144
net.ipv4.tcp_mem = 718803 958405 1437606
net.ipv4.tcp_migrate_req = 0
net.ipv4.tcp_min_rtt_wlen = 300
net.ipv4.tcp_min_snd_mss = 48
net.ipv4.tcp_min_tso_segs = 2
net.ipv4.tcp_moderate_rcvbuf = 1
net.ipv4.tcp_mtu_probe_floor = 48
net.ipv4.tcp_mtu_probing = 0
net.ipv4.tcp_no_metrics_save = 0
net.ipv4.tcp_no_ssthresh_metrics_save = 1
net.ipv4.tcp_notsent_lowat = 4294967295
net.ipv4.tcp_orphan_retries = 0
net.ipv4.tcp_pacing_ca_ratio = 120
net.ipv4.tcp_pacing_ss_ratio = 200
net.ipv4.tcp_plb_cong_thresh = 128
net.ipv4.tcp_plb_enabled = 0
net.ipv4.tcp_plb_idle_rehash_rounds = 3
net.ipv4.tcp_plb_rehash_rounds = 12
net.ipv4.tcp_plb_suspend_rto_sec = 60
net.ipv4.tcp_probe_interval = 600
net.ipv4.tcp_probe_threshold = 8
net.ipv4.tcp_recovery = 1
net.ipv4.tcp_reflect_tos = 0
net.ipv4.tcp_reordering = 3
net.ipv4.tcp_retrans_collapse = 1
net.ipv4.tcp_retries1 = 3
net.ipv4.tcp_retries2 = 15
net.ipv4.tcp_rfc1337 = 0
net.ipv4.tcp_rmem = 4096 131072 6291456
net.ipv4.tcp_sack = 1
net.ipv4.tcp_shrink_window = 0
net.ipv4.tcp_simult_connect = 0
net.ipv4.tcp_slow_start_after_idle = 1
net.ipv4.tcp_stdurg = 0
net.ipv4.tcp_syn_linear_timeouts = 4
net.ipv4.tcp_syn_retries = 6
net.ipv4.tcp_synack_retries = 5
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_thin_linear_timeouts = 0
net.ipv4.tcp_timestamps = 1
net.ipv4.tcp_tso_rtt_log = 9
net.ipv4.tcp_tso_win_divisor = 3
net.ipv4.tcp_tw_reuse = 2
net.ipv4.tcp_window_scaling = 1
net.ipv4.tcp_wmem = 4096 16384 4194304
net.ipv4.tcp_workaround_signed_windows = 0
net.ipv4.udp_child_hash_entries = 0
net.ipv4.udp_early_demux = 1
net.ipv4.udp_hash_entries = 32768
net.ipv4.udp_l3mdev_accept = 0
net.ipv4.udp_mem = 1437606 1916811 2875212
net.ipv4.udp_rmem_min = 4096
net.ipv4.udp_wmem_min = 4096
net.ipv4.xfrm4_gc_thresh = 32768
net.ipv6.anycast_src_echo_reply = 0
net.ipv6.auto_flowlabels = 1
net.ipv6.bindv6only = 0
net.ipv6.calipso_cache_bucket_size = 10
net.ipv6.calipso_cache_enable = 1
net.ipv6.conf.all.accept_dad = 0
net.ipv6.conf.all.accept_ra = 1
net.ipv6.conf.all.accept_ra_defrtr = 1
net.ipv6.conf.all.accept_ra_from_local = 0
net.ipv6.conf.all.accept_ra_min_hop_limit = 1
net.ipv6.conf.all.accept_ra_min_lft = 0
net.ipv6.conf.all.accept_ra_mtu = 1
net.ipv6.conf.all.accept_ra_pinfo = 1
net.ipv6.conf.all.accept_ra_rt_info_max_plen = 0
net.ipv6.conf.all.accept_ra_rt_info_min_plen = 0
net.ipv6.conf.all.accept_ra_rtr_pref = 1
net.ipv6.conf.all.accept_redirects = 1
net.ipv6.conf.all.accept_source_route = 0
net.ipv6.conf.all.accept_untracked_na = 0
net.ipv6.conf.all.addr_gen_mode = 0
net.ipv6.conf.all.autoconf = 1
net.ipv6.conf.all.dad_transmits = 1
net.ipv6.conf.all.disable_ipv6 = 0
net.ipv6.conf.all.disable_policy = 0
net.ipv6.conf.all.drop_unicast_in_l2_multicast = 0
net.ipv6.conf.all.drop_unsolicited_na = 0
net.ipv6.conf.all.enhanced_dad = 1
net.ipv6.conf.all.force_mld_version = 0
net.ipv6.conf.all.force_tllao = 0
net.ipv6.conf.all.forwarding = 0
net.ipv6.conf.all.hop_limit = 64
net.ipv6.conf.all.ignore_routes_with_linkdown = 0
net.ipv6.conf.all.ioam6_enabled = 0
net.ipv6.conf.all.ioam6_id = 65535
net.ipv6.conf.all.ioam6_id_wide = 4294967295
net.ipv6.conf.all.keep_addr_on_down = 0
net.ipv6.conf.all.max_addresses = 16
net.ipv6.conf.all.max_desync_factor = 600
net.ipv6.conf.all.mc_forwarding = 0
net.ipv6.conf.all.mldv1_unsolicited_report_interval = 10000
net.ipv6.conf.all.mldv2_unsolicited_report_interval = 1000
net.ipv6.conf.all.mtu = 1280
net.ipv6.conf.all.ndisc_evict_nocarrier = 1
net.ipv6.conf.all.ndisc_notify = 0
net.ipv6.conf.all.ndisc_tclass = 0
net.ipv6.conf.all.optimistic_dad = 0
net.ipv6.conf.all.proxy_ndp = 0
net.ipv6.conf.all.ra_defrtr_metric = 1024
net.ipv6.conf.all.regen_max_retry = 3
net.ipv6.conf.all.router_probe_interval = 60
net.ipv6.conf.all.router_solicitation_delay = 1
net.ipv6.conf.all.router_solicitation_interval = 4
net.ipv6.conf.all.router_solicitation_max_interval = 3600
net.ipv6.conf.all.router_solicitations = -1
net.ipv6.conf.all.rpl_seg_enabled = 0
net.ipv6.conf.all.seg6_enabled = 0
net.ipv6.conf.all.seg6_require_hmac = 0
net.ipv6.conf.all.suppress_frag_ndisc = 1
net.ipv6.conf.all.temp_prefered_lft = 86400
net.ipv6.conf.all.temp_valid_lft = 604800
net.ipv6.conf.all.use_oif_addrs_only = 0
net.ipv6.conf.all.use_optimistic = 0
net.ipv6.conf.all.use_tempaddr = 0
net.ipv6.conf.default.accept_dad = 1
net.ipv6.conf.default.accept_ra = 1
net.ipv6.conf.default.accept_ra_defrtr = 1
net.ipv6.conf.default.accept_ra_from_local = 0
net.ipv6.conf.default.accept_ra_min_hop_limit = 1
net.ipv6.conf.default.accept_ra_min_lft = 0
net.ipv6.conf.default.accept_ra_mtu = 1
net.ipv6.conf.default.accept_ra_pinfo = 1
net.ipv6.conf.default.accept_ra_rt_info_max_plen = 0
net.ipv6.conf.default.accept_ra_rt_info_min_plen = 0
net.ipv6.conf.default.accept_ra_rtr_pref = 1
net.ipv6.conf.default.accept_redirects = 1
net.ipv6.conf.default.accept_source_route = 0
net.ipv6.conf.default.accept_untracked_na = 0
net.ipv6.conf.default.addr_gen_mode = 0
net.ipv6.conf.default.autoconf = 1
net.ipv6.conf.default.dad_transmits = 1
net.ipv6.conf.default.disable_ipv6 = 0
net.ipv6.conf.default.disable_policy = 0
net.ipv6.conf.default.drop_unicast_in_l2_multicast = 0
net.ipv6.conf.default.drop_unsolicited_na = 0
net.ipv6.conf.default.enhanced_dad = 1
net.ipv6.conf.default.force_mld_version = 0
net.ipv6.conf.default.force_tllao = 0
net.ipv6.conf.default.forwarding = 0
net.ipv6.conf.default.hop_limit = 64
net.ipv6.conf.default.ignore_routes_with_linkdown = 0
net.ipv6.conf.default.ioam6_enabled = 0
net.ipv6.conf.default.ioam6_id = 65535
net.ipv6.conf.default.ioam6_id_wide = 4294967295
net.ipv6.conf.default.keep_addr_on_down = 0
net.ipv6.conf.default.max_addresses = 16
net.ipv6.conf.default.max_desync_factor = 600
net.ipv6.conf.default.mc_forwarding = 0
net.ipv6.conf.default.mldv1_unsolicited_report_interval = 10000
net.ipv6.conf.default.mldv2_unsolicited_report_interval = 1000
net.ipv6.conf.default.mtu = 1280
net.ipv6.conf.default.ndisc_evict_nocarrier = 1
net.ipv6.conf.default.ndisc_notify = 0
net.ipv6.conf.default.ndisc_tclass = 0
net.ipv6.conf.default.optimistic_dad = 0
net.ipv6.conf.default.proxy_ndp = 0
net.ipv6.conf.default.ra_defrtr_metric = 1024
net.ipv6.conf.default.regen_max_retry = 3
net.ipv6.conf.default.router_probe_interval = 60
net.ipv6.conf.default.router_solicitation_delay = 1
net.ipv6.conf.default.router_solicitation_interval = 4
net.ipv6.conf.default.router_solicitation_max_interval = 3600
net.ipv6.conf.default.router_solicitations = -1
net.ipv6.conf.default.rpl_seg_enabled = 0
net.ipv6.conf.default.seg6_enabled = 0
net.ipv6.conf.default.seg6_require_hmac = 0
net.ipv6.conf.default.suppress_frag_ndisc = 1
net.ipv6.conf.default.temp_prefered_lft = 86400
net.ipv6.conf.default.temp_valid_lft = 604800
net.ipv6.conf.default.use_oif_addrs_only = 0
net.ipv6.conf.default.use_optimistic = 0
net.ipv6.conf.default.use_tempaddr = 0
net.ipv6.conf.enp2s0.accept_dad = 1
net.ipv6.conf.enp2s0.accept_ra = 0
net.ipv6.conf.enp2s0.accept_ra_defrtr = 1
net.ipv6.conf.enp2s0.accept_ra_from_local = 0
net.ipv6.conf.enp2s0.accept_ra_min_hop_limit = 1
net.ipv6.conf.enp2s0.accept_ra_min_lft = 0
net.ipv6.conf.enp2s0.accept_ra_mtu = 1
net.ipv6.conf.enp2s0.accept_ra_pinfo = 1
net.ipv6.conf.enp2s0.accept_ra_rt_info_max_plen = 0
net.ipv6.conf.enp2s0.accept_ra_rt_info_min_plen = 0
net.ipv6.conf.enp2s0.accept_ra_rtr_pref = 1
net.ipv6.conf.enp2s0.accept_redirects = 1
net.ipv6.conf.enp2s0.accept_source_route = 0
net.ipv6.conf.enp2s0.accept_untracked_na = 0
net.ipv6.conf.enp2s0.addr_gen_mode = 1
net.ipv6.conf.enp2s0.autoconf = 1
net.ipv6.conf.enp2s0.dad_transmits = 1
net.ipv6.conf.enp2s0.disable_ipv6 = 0
net.ipv6.conf.enp2s0.disable_policy = 0
net.ipv6.conf.enp2s0.drop_unicast_in_l2_multicast = 0
net.ipv6.conf.enp2s0.drop_unsolicited_na = 0
net.ipv6.conf.enp2s0.enhanced_dad = 1
net.ipv6.conf.enp2s0.force_mld_version = 0
net.ipv6.conf.enp2s0.force_tllao = 0
net.ipv6.conf.enp2s0.forwarding = 0
net.ipv6.conf.enp2s0.hop_limit = 64
net.ipv6.conf.enp2s0.ignore_routes_with_linkdown = 0
net.ipv6.conf.enp2s0.ioam6_enabled = 0
net.ipv6.conf.enp2s0.ioam6_id = 65535
net.ipv6.conf.enp2s0.ioam6_id_wide = 4294967295
net.ipv6.conf.enp2s0.keep_addr_on_down = 0
net.ipv6.conf.enp2s0.max_addresses = 16
net.ipv6.conf.enp2s0.max_desync_factor = 600
net.ipv6.conf.enp2s0.mc_forwarding = 0
net.ipv6.conf.enp2s0.mldv1_unsolicited_report_interval = 10000
net.ipv6.conf.enp2s0.mldv2_unsolicited_report_interval = 1000
net.ipv6.conf.enp2s0.mtu = 1500
net.ipv6.conf.enp2s0.ndisc_evict_nocarrier = 1
net.ipv6.conf.enp2s0.ndisc_notify = 0
net.ipv6.conf.enp2s0.ndisc_tclass = 0
net.ipv6.conf.enp2s0.optimistic_dad = 0
net.ipv6.conf.enp2s0.proxy_ndp = 0
net.ipv6.conf.enp2s0.ra_defrtr_metric = 1024
net.ipv6.conf.enp2s0.regen_max_retry = 3
net.ipv6.conf.enp2s0.router_probe_interval = 60
net.ipv6.conf.enp2s0.router_solicitation_delay = 1
net.ipv6.conf.enp2s0.router_solicitation_interval = 4
net.ipv6.conf.enp2s0.router_solicitation_max_interval = 3600
net.ipv6.conf.enp2s0.router_solicitations = -1
net.ipv6.conf.enp2s0.rpl_seg_enabled = 0
net.ipv6.conf.enp2s0.seg6_enabled = 0
net.ipv6.conf.enp2s0.seg6_require_hmac = 0
net.ipv6.conf.enp2s0.suppress_frag_ndisc = 1
net.ipv6.conf.enp2s0.temp_prefered_lft = 86400
net.ipv6.conf.enp2s0.temp_valid_lft = 604800
net.ipv6.conf.enp2s0.use_oif_addrs_only = 0
net.ipv6.conf.enp2s0.use_optimistic = 0
net.ipv6.conf.enp2s0.use_tempaddr = 0
net.ipv6.conf.lo.accept_dad = -1
net.ipv6.conf.lo.accept_ra = 1
net.ipv6.conf.lo.accept_ra_defrtr = 1
net.ipv6.conf.lo.accept_ra_from_local = 0
net.ipv6.conf.lo.accept_ra_min_hop_limit = 1
net.ipv6.conf.lo.accept_ra_min_lft = 0
net.ipv6.conf.lo.accept_ra_mtu = 1
net.ipv6.conf.lo.accept_ra_pinfo = 1
net.ipv6.conf.lo.accept_ra_rt_info_max_plen = 0
net.ipv6.conf.lo.accept_ra_rt_info_min_plen = 0
net.ipv6.conf.lo.accept_ra_rtr_pref = 1
net.ipv6.conf.lo.accept_redirects = 1
net.ipv6.conf.lo.accept_source_route = 0
net.ipv6.conf.lo.accept_untracked_na = 0
net.ipv6.conf.lo.addr_gen_mode = 0
net.ipv6.conf.lo.autoconf = 1
net.ipv6.conf.lo.dad_transmits = 1
net.ipv6.conf.lo.disable_ipv6 = 0
net.ipv6.conf.lo.disable_policy = 0
net.ipv6.conf.lo.drop_unicast_in_l2_multicast = 0
net.ipv6.conf.lo.drop_unsolicited_na = 0
net.ipv6.conf.lo.enhanced_dad = 1
net.ipv6.conf.lo.force_mld_version = 0
net.ipv6.conf.lo.force_tllao = 0
net.ipv6.conf.lo.forwarding = 0
net.ipv6.conf.lo.hop_limit = 64
net.ipv6.conf.lo.ignore_routes_with_linkdown = 0
net.ipv6.conf.lo.ioam6_enabled = 0
net.ipv6.conf.lo.ioam6_id = 65535
net.ipv6.conf.lo.ioam6_id_wide = 4294967295
net.ipv6.conf.lo.keep_addr_on_down = 0
net.ipv6.conf.lo.max_addresses = 16
net.ipv6.conf.lo.max_desync_factor = 600
net.ipv6.conf.lo.mc_forwarding = 0
net.ipv6.conf.lo.mldv1_unsolicited_report_interval = 10000
net.ipv6.conf.lo.mldv2_unsolicited_report_interval = 1000
net.ipv6.conf.lo.mtu = 65536
net.ipv6.conf.lo.ndisc_evict_nocarrier = 1
net.ipv6.conf.lo.ndisc_notify = 0
net.ipv6.conf.lo.ndisc_tclass = 0
net.ipv6.conf.lo.optimistic_dad = 0
net.ipv6.conf.lo.proxy_ndp = 0
net.ipv6.conf.lo.ra_defrtr_metric = 1024
net.ipv6.conf.lo.regen_max_retry = 3
net.ipv6.conf.lo.router_probe_interval = 60
net.ipv6.conf.lo.router_solicitation_delay = 1
net.ipv6.conf.lo.router_solicitation_interval = 4
net.ipv6.conf.lo.router_solicitation_max_interval = 3600
net.ipv6.conf.lo.router_solicitations = -1
net.ipv6.conf.lo.rpl_seg_enabled = 0
net.ipv6.conf.lo.seg6_enabled = 0
net.ipv6.conf.lo.seg6_require_hmac = 0
net.ipv6.conf.lo.suppress_frag_ndisc = 1
net.ipv6.conf.lo.temp_prefered_lft = 86400
net.ipv6.conf.lo.temp_valid_lft = 604800
net.ipv6.conf.lo.use_oif_addrs_only = 0
net.ipv6.conf.lo.use_optimistic = 0
net.ipv6.conf.lo.use_tempaddr = -1
net.ipv6.conf.wlo1.accept_dad = 1
net.ipv6.conf.wlo1.accept_ra = 0
net.ipv6.conf.wlo1.accept_ra_defrtr = 1
net.ipv6.conf.wlo1.accept_ra_from_local = 0
net.ipv6.conf.wlo1.accept_ra_min_hop_limit = 1
net.ipv6.conf.wlo1.accept_ra_min_lft = 0
net.ipv6.conf.wlo1.accept_ra_mtu = 1
net.ipv6.conf.wlo1.accept_ra_pinfo = 1
net.ipv6.conf.wlo1.accept_ra_rt_info_max_plen = 0
net.ipv6.conf.wlo1.accept_ra_rt_info_min_plen = 0
net.ipv6.conf.wlo1.accept_ra_rtr_pref = 1
net.ipv6.conf.wlo1.accept_redirects = 1
net.ipv6.conf.wlo1.accept_source_route = 0
net.ipv6.conf.wlo1.accept_untracked_na = 0
net.ipv6.conf.wlo1.addr_gen_mode = 1
net.ipv6.conf.wlo1.autoconf = 1
net.ipv6.conf.wlo1.dad_transmits = 1
net.ipv6.conf.wlo1.disable_ipv6 = 0
net.ipv6.conf.wlo1.disable_policy = 0
net.ipv6.conf.wlo1.drop_unicast_in_l2_multicast = 0
net.ipv6.conf.wlo1.drop_unsolicited_na = 0
net.ipv6.conf.wlo1.enhanced_dad = 1
net.ipv6.conf.wlo1.force_mld_version = 0
net.ipv6.conf.wlo1.force_tllao = 0
net.ipv6.conf.wlo1.forwarding = 0
net.ipv6.conf.wlo1.hop_limit = 64
net.ipv6.conf.wlo1.ignore_routes_with_linkdown = 0
net.ipv6.conf.wlo1.ioam6_enabled = 0
net.ipv6.conf.wlo1.ioam6_id = 65535
net.ipv6.conf.wlo1.ioam6_id_wide = 4294967295
net.ipv6.conf.wlo1.keep_addr_on_down = 0
net.ipv6.conf.wlo1.max_addresses = 16
net.ipv6.conf.wlo1.max_desync_factor = 600
net.ipv6.conf.wlo1.mc_forwarding = 0
net.ipv6.conf.wlo1.mldv1_unsolicited_report_interval = 10000
net.ipv6.conf.wlo1.mldv2_unsolicited_report_interval = 1000
net.ipv6.conf.wlo1.mtu = 1500
net.ipv6.conf.wlo1.ndisc_evict_nocarrier = 1
net.ipv6.conf.wlo1.ndisc_notify = 0
net.ipv6.conf.wlo1.ndisc_tclass = 0
net.ipv6.conf.wlo1.optimistic_dad = 0
net.ipv6.conf.wlo1.proxy_ndp = 0
net.ipv6.conf.wlo1.ra_defrtr_metric = 1024
net.ipv6.conf.wlo1.regen_max_retry = 3
net.ipv6.conf.wlo1.router_probe_interval = 60
net.ipv6.conf.wlo1.router_solicitation_delay = 1
net.ipv6.conf.wlo1.router_solicitation_interval = 4
net.ipv6.conf.wlo1.router_solicitation_max_interval = 3600
net.ipv6.conf.wlo1.router_solicitations = -1
net.ipv6.conf.wlo1.rpl_seg_enabled = 0
net.ipv6.conf.wlo1.seg6_enabled = 0
net.ipv6.conf.wlo1.seg6_require_hmac = 0
net.ipv6.conf.wlo1.suppress_frag_ndisc = 1
net.ipv6.conf.wlo1.temp_prefered_lft = 86400
net.ipv6.conf.wlo1.temp_valid_lft = 604800
net.ipv6.conf.wlo1.use_oif_addrs_only = 0
net.ipv6.conf.wlo1.use_optimistic = 0
net.ipv6.conf.wlo1.use_tempaddr = 0
net.ipv6.fib_multipath_hash_fields = 7
net.ipv6.fib_multipath_hash_policy = 0
net.ipv6.fib_notify_on_flag_change = 0
net.ipv6.flowlabel_consistency = 1
net.ipv6.flowlabel_reflect = 0
net.ipv6.flowlabel_state_ranges = 0
net.ipv6.fwmark_reflect = 0
net.ipv6.icmp.echo_ignore_all = 0
net.ipv6.icmp.echo_ignore_anycast = 0
net.ipv6.icmp.echo_ignore_multicast = 0
net.ipv6.icmp.error_anycast_as_unicast = 0
net.ipv6.icmp.ratelimit = 1000
net.ipv6.icmp.ratemask = 0-1,3-127
net.ipv6.idgen_delay = 1
net.ipv6.idgen_retries = 3
net.ipv6.ioam6_id = 16777215
net.ipv6.ioam6_id_wide = 72057594037927935
net.ipv6.ip6frag_high_thresh = 4194304
net.ipv6.ip6frag_low_thresh = 3145728
net.ipv6.ip6frag_secret_interval = 0
net.ipv6.ip6frag_time = 60
net.ipv6.ip_nonlocal_bind = 0
net.ipv6.max_dst_opts_length = 2147483647
net.ipv6.max_dst_opts_number = 8
net.ipv6.max_hbh_length = 2147483647
net.ipv6.max_hbh_opts_number = 8
net.ipv6.mld_max_msf = 64
net.ipv6.mld_qrv = 2
net.ipv6.neigh.default.anycast_delay = 99
net.ipv6.neigh.default.app_solicit = 0
net.ipv6.neigh.default.base_reachable_time_ms = 30000
net.ipv6.neigh.default.delay_first_probe_time = 5
net.ipv6.neigh.default.gc_interval = 30
net.ipv6.neigh.default.gc_stale_time = 60
net.ipv6.neigh.default.gc_thresh1 = 128
net.ipv6.neigh.default.gc_thresh2 = 512
net.ipv6.neigh.default.gc_thresh3 = 1024
net.ipv6.neigh.default.interval_probe_time_ms = 5000
net.ipv6.neigh.default.locktime = 0
net.ipv6.neigh.default.mcast_resolicit = 0
net.ipv6.neigh.default.mcast_solicit = 3
net.ipv6.neigh.default.proxy_delay = 79
net.ipv6.neigh.default.proxy_qlen = 64
net.ipv6.neigh.default.retrans_time_ms = 1000
net.ipv6.neigh.default.ucast_solicit = 3
net.ipv6.neigh.default.unres_qlen = 101
net.ipv6.neigh.default.unres_qlen_bytes = 212992
net.ipv6.neigh.enp2s0.anycast_delay = 99
net.ipv6.neigh.enp2s0.app_solicit = 0
net.ipv6.neigh.enp2s0.base_reachable_time_ms = 30000
net.ipv6.neigh.enp2s0.delay_first_probe_time = 5
net.ipv6.neigh.enp2s0.gc_stale_time = 60
net.ipv6.neigh.enp2s0.interval_probe_time_ms = 5000
net.ipv6.neigh.enp2s0.locktime = 0
net.ipv6.neigh.enp2s0.mcast_resolicit = 0
net.ipv6.neigh.enp2s0.mcast_solicit = 3
net.ipv6.neigh.enp2s0.proxy_delay = 79
net.ipv6.neigh.enp2s0.proxy_qlen = 64
net.ipv6.neigh.enp2s0.retrans_time_ms = 1000
net.ipv6.neigh.enp2s0.ucast_solicit = 3
net.ipv6.neigh.enp2s0.unres_qlen = 101
net.ipv6.neigh.enp2s0.unres_qlen_bytes = 212992
net.ipv6.neigh.lo.anycast_delay = 99
net.ipv6.neigh.lo.app_solicit = 0
net.ipv6.neigh.lo.base_reachable_time_ms = 30000
net.ipv6.neigh.lo.delay_first_probe_time = 5
net.ipv6.neigh.lo.gc_stale_time = 60
net.ipv6.neigh.lo.interval_probe_time_ms = 5000
net.ipv6.neigh.lo.locktime = 0
net.ipv6.neigh.lo.mcast_resolicit = 0
net.ipv6.neigh.lo.mcast_solicit = 3
net.ipv6.neigh.lo.proxy_delay = 79
net.ipv6.neigh.lo.proxy_qlen = 64
net.ipv6.neigh.lo.retrans_time_ms = 1000
net.ipv6.neigh.lo.ucast_solicit = 3
net.ipv6.neigh.lo.unres_qlen = 101
net.ipv6.neigh.lo.unres_qlen_bytes = 212992
net.ipv6.neigh.wlo1.anycast_delay = 99
net.ipv6.neigh.wlo1.app_solicit = 0
net.ipv6.neigh.wlo1.base_reachable_time_ms = 30000
net.ipv6.neigh.wlo1.delay_first_probe_time = 5
net.ipv6.neigh.wlo1.gc_stale_time = 60
net.ipv6.neigh.wlo1.interval_probe_time_ms = 5000
net.ipv6.neigh.wlo1.locktime = 0
net.ipv6.neigh.wlo1.mcast_resolicit = 0
net.ipv6.neigh.wlo1.mcast_solicit = 3
net.ipv6.neigh.wlo1.proxy_delay = 79
net.ipv6.neigh.wlo1.proxy_qlen = 64
net.ipv6.neigh.wlo1.retrans_time_ms = 1000
net.ipv6.neigh.wlo1.ucast_solicit = 3
net.ipv6.neigh.wlo1.unres_qlen = 101
net.ipv6.neigh.wlo1.unres_qlen_bytes = 212992
net.ipv6.route.gc_elasticity = 9
net.ipv6.route.gc_interval = 30
net.ipv6.route.gc_min_interval = 0
net.ipv6.route.gc_min_interval_ms = 500
net.ipv6.route.gc_thresh = 1024
net.ipv6.route.gc_timeout = 60
net.ipv6.route.max_size = 2147483647
net.ipv6.route.min_adv_mss = 1220
net.ipv6.route.mtu_expires = 600
net.ipv6.route.skip_notify_on_dev_down = 0
net.ipv6.seg6_flowlabel = 0
net.ipv6.xfrm6_gc_thresh = 32768
net.mptcp.add_addr_timeout = 120
net.mptcp.allow_join_initial_addr_port = 1
net.mptcp.checksum_enabled = 0
net.mptcp.enabled = 1
net.mptcp.pm_type = 0
net.mptcp.stale_loss_cnt = 4
net.netfilter.nf_conntrack_acct = 0
net.netfilter.nf_conntrack_buckets = 262144
net.netfilter.nf_conntrack_checksum = 1
net.netfilter.nf_conntrack_count = 12
net.netfilter.nf_conntrack_dccp_loose = 1
net.netfilter.nf_conntrack_dccp_timeout_closereq = 64
net.netfilter.nf_conntrack_dccp_timeout_closing = 64
net.netfilter.nf_conntrack_dccp_timeout_open = 43200
net.netfilter.nf_conntrack_dccp_timeout_partopen = 480
net.netfilter.nf_conntrack_dccp_timeout_request = 240
net.netfilter.nf_conntrack_dccp_timeout_respond = 480
net.netfilter.nf_conntrack_dccp_timeout_timewait = 240
net.netfilter.nf_conntrack_events = 2
net.netfilter.nf_conntrack_expect_max = 4096
net.netfilter.nf_conntrack_frag6_high_thresh = 4194304
net.netfilter.nf_conntrack_frag6_low_thresh = 3145728
net.netfilter.nf_conntrack_frag6_timeout = 60
net.netfilter.nf_conntrack_generic_timeout = 600
net.netfilter.nf_conntrack_gre_timeout = 30
net.netfilter.nf_conntrack_gre_timeout_stream = 180
net.netfilter.nf_conntrack_icmp_timeout = 30
net.netfilter.nf_conntrack_icmpv6_timeout = 30
net.netfilter.nf_conntrack_log_invalid = 0
net.netfilter.nf_conntrack_max = 262144
net.netfilter.nf_conntrack_sctp_timeout_closed = 10
net.netfilter.nf_conntrack_sctp_timeout_cookie_echoed = 3
net.netfilter.nf_conntrack_sctp_timeout_cookie_wait = 3
net.netfilter.nf_conntrack_sctp_timeout_established = 210
net.netfilter.nf_conntrack_sctp_timeout_heartbeat_sent = 30
net.netfilter.nf_conntrack_sctp_timeout_shutdown_ack_sent = 3
net.netfilter.nf_conntrack_sctp_timeout_shutdown_recd = 3
net.netfilter.nf_conntrack_sctp_timeout_shutdown_sent = 3
net.netfilter.nf_conntrack_tcp_be_liberal = 0
net.netfilter.nf_conntrack_tcp_ignore_invalid_rst = 0
net.netfilter.nf_conntrack_tcp_loose = 1
net.netfilter.nf_conntrack_tcp_max_retrans = 3
net.netfilter.nf_conntrack_tcp_timeout_close = 10
net.netfilter.nf_conntrack_tcp_timeout_close_wait = 60
net.netfilter.nf_conntrack_tcp_timeout_established = 432000
net.netfilter.nf_conntrack_tcp_timeout_fin_wait = 120
net.netfilter.nf_conntrack_tcp_timeout_last_ack = 30
net.netfilter.nf_conntrack_tcp_timeout_max_retrans = 300
net.netfilter.nf_conntrack_tcp_timeout_syn_recv = 60
net.netfilter.nf_conntrack_tcp_timeout_syn_sent = 120
net.netfilter.nf_conntrack_tcp_timeout_time_wait = 120
net.netfilter.nf_conntrack_tcp_timeout_unacknowledged = 300
net.netfilter.nf_conntrack_timestamp = 0
net.netfilter.nf_conntrack_udp_timeout = 30
net.netfilter.nf_conntrack_udp_timeout_stream = 120
net.netfilter.nf_flowtable_tcp_timeout = 30
net.netfilter.nf_flowtable_udp_timeout = 30
net.netfilter.nf_hooks_lwtunnel = 0
net.netfilter.nf_log.0 = NONE
net.netfilter.nf_log.1 = NONE
net.netfilter.nf_log.10 = NONE
net.netfilter.nf_log.2 = NONE
net.netfilter.nf_log.3 = NONE
net.netfilter.nf_log.4 = NONE
net.netfilter.nf_log.5 = NONE
net.netfilter.nf_log.6 = NONE
net.netfilter.nf_log.7 = NONE
net.netfilter.nf_log.8 = NONE
net.netfilter.nf_log.9 = NONE
net.netfilter.nf_log_all_netns = 0
net.nf_conntrack_max = 262144
net.unix.max_dgram_qlen = 512
user.max_cgroup_namespaces = 240346
user.max_fanotify_groups = 128
user.max_fanotify_marks = 468787
user.max_inotify_instances = 1024
user.max_inotify_watches = 524288
user.max_ipc_namespaces = 240346
user.max_mnt_namespaces = 240346
user.max_net_namespaces = 240346
user.max_pid_namespaces = 240346
user.max_time_namespaces = 240346
user.max_user_namespaces = 240346
user.max_uts_namespaces = 240346
vm.admin_reserve_kbytes = 8192
vm.compact_unevictable_allowed = 1
vm.compaction_proactiveness = 20
vm.dirty_background_bytes = 0
vm.dirty_background_ratio = 10
vm.dirty_bytes = 0
vm.dirty_expire_centisecs = 3000
vm.dirty_ratio = 20
vm.dirty_writeback_centisecs = 500
vm.dirtytime_expire_seconds = 43200
vm.extfrag_threshold = 500
vm.hugetlb_optimize_vmemmap = 0
vm.hugetlb_shm_group = 0
vm.laptop_mode = 0
vm.legacy_va_layout = 0
vm.lowmem_reserve_ratio = 256 256 32 0 0
vm.max_map_count = 65530
vm.memfd_noexec = 0
vm.memory_failure_early_kill = 0
vm.memory_failure_recovery = 1
vm.min_free_kbytes = 67584
vm.min_slab_ratio = 5
vm.min_unmapped_ratio = 1
vm.mmap_min_addr = 65536
vm.mmap_rnd_bits = 32
vm.mmap_rnd_compat_bits = 16
vm.nr_hugepages = 0
vm.nr_hugepages_mempolicy = 0
vm.nr_overcommit_hugepages = 0
vm.numa_stat = 1
vm.numa_zonelist_order = Node
vm.oom_dump_tasks = 1
vm.oom_kill_allocating_task = 0
vm.overcommit_kbytes = 0
vm.overcommit_memory = 0
vm.overcommit_ratio = 50
vm.page-cluster = 3
vm.page_lock_unfairness = 5
vm.panic_on_oom = 0
vm.percpu_pagelist_high_fraction = 0
vm.stat_interval = 1
vm.swappiness = 60
vm.user_reserve_kbytes = 131072
vm.vfs_cache_pressure = 100
vm.watermark_boost_factor = 15000
vm.watermark_scale_factor = 10
vm.zone_reclaim_mode = 0

KCONFIG:
[r@station ~]$ zgrep FTRACE /proc/config.gz
CONFIG_KPROBES_ON_FTRACE=y
CONFIG_HAVE_KPROBES_ON_FTRACE=y
CONFIG_STM_SOURCE_FTRACE=m
# CONFIG_PSTORE_FTRACE is not set
CONFIG_HAVE_DYNAMIC_FTRACE=y
CONFIG_HAVE_DYNAMIC_FTRACE_WITH_REGS=y
CONFIG_HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS=y
CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS=y
CONFIG_HAVE_DYNAMIC_FTRACE_NO_PATCHABLE=y
CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
CONFIG_FTRACE=y
CONFIG_DYNAMIC_FTRACE=y
CONFIG_DYNAMIC_FTRACE_WITH_REGS=y
CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS=y
CONFIG_DYNAMIC_FTRACE_WITH_ARGS=y
CONFIG_FTRACE_SYSCALLS=y
CONFIG_FTRACE_MCOUNT_RECORD=y
CONFIG_FTRACE_MCOUNT_USE_CC=y
# CONFIG_FTRACE_RECORD_RECURSION is not set
# CONFIG_FTRACE_STARTUP_TEST is not set
# CONFIG_FTRACE_SORT_STARTUP_TEST is not set
CONFIG_HAVE_SAMPLE_FTRACE_DIRECT=y
CONFIG_HAVE_SAMPLE_FTRACE_DIRECT_MULTI=y

[r@station ~]$ zgrep KPROBE /proc/config.gz
CONFIG_KPROBES=y
CONFIG_KPROBES_ON_FTRACE=y
CONFIG_HAVE_KPROBES=y
CONFIG_HAVE_KPROBES_ON_FTRACE=y
CONFIG_KPROBE_EVENTS=y
# CONFIG_KPROBE_EVENTS_ON_NOTRACE is not set
# CONFIG_BPF_KPROBE_OVERRIDE is not set
# CONFIG_KPROBE_EVENT_GEN_TEST is not set

[r@station ~]$ zgrep UPROBE /proc/config.gz
CONFIG_ARCH_SUPPORTS_UPROBES=y
CONFIG_UPROBES=y
CONFIG_UPROBE_EVENTS=y

[r@station ~]$ zgrep SYSCALL /proc/config.gz
CONFIG_HAVE_ARCH_AUDITSYSCALL=y
CONFIG_AUDITSYSCALL=y
CONFIG_GENERIC_TIME_VSYSCALL=y
CONFIG_BPF_SYSCALL=y
CONFIG_SGETMASK_SYSCALL=y
# CONFIG_SYSFS_SYSCALL is not set
CONFIG_ADVISE_SYSCALLS=y
CONFIG_CACHESTAT_SYSCALL=y
CONFIG_X86_VSYSCALL_EMULATION=y
# CONFIG_LEGACY_VSYSCALL_XONLY is not set
CONFIG_LEGACY_VSYSCALL_NONE=y
# CONFIG_MODIFY_LDT_SYSCALL is not set
CONFIG_ARCH_HAS_SYSCALL_WRAPPER=y
CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
CONFIG_FTRACE_SYSCALLS=y

[r@station ~]$ zgrep BPF /proc/config.gz
CONFIG_BPF=y
CONFIG_HAVE_EBPF_JIT=y
CONFIG_ARCH_WANT_DEFAULT_BPF_JIT=y
# BPF subsystem
CONFIG_BPF_SYSCALL=y
CONFIG_BPF_JIT=y
CONFIG_BPF_JIT_ALWAYS_ON=y
CONFIG_BPF_JIT_DEFAULT_ON=y
CONFIG_BPF_UNPRIV_DEFAULT_OFF=y
# CONFIG_BPF_PRELOAD is not set
CONFIG_BPF_LSM=y
# end of BPF subsystem
CONFIG_CGROUP_BPF=y
CONFIG_IPV6_SEG6_BPF=y
CONFIG_NETFILTER_BPF_LINK=y
CONFIG_NETFILTER_XT_MATCH_BPF=m
# CONFIG_BPFILTER is not set
CONFIG_NET_CLS_BPF=m
CONFIG_NET_ACT_BPF=m
CONFIG_BPF_STREAM_PARSER=y
CONFIG_LWTUNNEL_BPF=y
# HID-BPF support
CONFIG_HID_BPF=y
# end of HID-BPF support
CONFIG_BPF_EVENTS=y
# CONFIG_BPF_KPROBE_OVERRIDE is not set
# CONFIG_TEST_BPF is not set

[r@station r]$ zgrep DEBUGFS /proc/config.gz
# CONFIG_GENERIC_IRQ_DEBUGFS is not set
# CONFIG_ACPI_EC_DEBUGFS is not set
CONFIG_MODULE_DEBUGFS=y
# CONFIG_CMA_DEBUGFS is not set
# CONFIG_L2TP_DEBUGFS is not set
# CONFIG_6LOWPAN_DEBUGFS is not set
# CONFIG_BT_DEBUGFS is not set
# CONFIG_CFG80211_DEBUGFS is not set
# CONFIG_MAC80211_DEBUGFS is not set
# CONFIG_ATH9K_DEBUGFS is not set
# CONFIG_ATH9K_HTC_DEBUGFS is not set
# CONFIG_WIL6210_DEBUGFS is not set
# CONFIG_ATH10K_DEBUGFS is not set
# CONFIG_WCN36XX_DEBUGFS is not set
# CONFIG_RTW88_DEBUGFS is not set
# CONFIG_RTW89_DEBUGFS is not set
# CONFIG_RSI_DEBUGFS is not set
# CONFIG_IEEE802154_CA8210_DEBUGFS is not set
CONFIG_WWAN_DEBUGFS=y
# CONFIG_SMS_SIANO_DEBUGFS is not set
CONFIG_CROS_EC_DEBUGFS=m
CONFIG_WILCO_EC_DEBUGFS=m
# CONFIG_IOMMU_DEBUGFS is not set
# CONFIG_USB4_DEBUGFS_WRITE is not set
# CONFIG_CRYPTO_DEV_CCP_DEBUGFS is not set
# CONFIG_PTDUMP_DEBUGFS is not set

[r@station r]$ zgrep DEBUG_FS /proc/config.gz
# CONFIG_XEN_DEBUG_FS is not set
CONFIG_BLK_DEBUG_FS=y
CONFIG_BLK_DEBUG_FS_ZONED=y
# CONFIG_SCSI_SNIC_DEBUG_FS is not set
# CONFIG_SCSI_LPFC_DEBUG_FS is not set
# CONFIG_OCFS2_DEBUG_FS is not set
CONFIG_DEBUG_FS=y
# CONFIG_DEBUG_FS_ALLOW_ALL is not set
# CONFIG_DEBUG_FS_DISALLOW_MOUNT is not set
CONFIG_DEBUG_FS_ALLOW_NONE=y

BOOT OPTIONS (systemd-boot)
[r@station ~]$ cat /boot/loader/entries/arch.conf
title archlinux
linux /vmlinuz-linux-hardened
initrd /amd-ucode.img
initrd /initramfs-linux-hardened.img
options cryptdevice=UUID=XXX:roote root=/dev/mapper/root rw iommu=force nosmt=force mitigations=auto,nosmt

DEBUGFS
[r@station ~]$ sudo dmesg | grep debugfs
[ 4.368928] pinctrl core: failed to create debugfs directory
[ 4.625699] zsmalloc: debugfs not available, stat dir not created
[ 4.633071] pinctrl core: failed to create debugfs directory for AMDI0030:00
[ 4.718985] zswap: debugfs initialization failed
[ 5.289343] cec: Failed to create debugfs cec dir
[ 36.701912] request_module fs-debugfs succeeded, but still no fs?

[tjbbjt]

Removing lockdown=confidentiality from grub boot parameters fixed eBPF disabling for me.

[gustavo-iniguez-goya]

hi @moisesmsf ,

I've got an Arch installation with a hardened kernel as well, where this error pop-ups. As far as I can tell, we (gobpf+opensnitch) depend on 2 options to configure the kprobes/tracepoints: DEBUGFS and TRACEFS.

DEBUGFS is usually mounted under /sys/kernel/debug, and TRACEFS under /sys/kernel/debug/tracing

On this Arch installation, I can mount TRACEFS under any directory (i.e.: tracefs mount option is available):

~ # mkdir x
~ # mount -t tracefs none x/
~ # ls x/
README                      dyn_ftrace_total_info     instances        saved_cmdlines         set_ftrace_notrace_pid  synthetic_events  trace_stat
available_events            dynamic_events            kprobe_events    saved_cmdlines_size    set_ftrace_pid          timestamp_mode    tracing_cpumask
(...)

I think that this should be enough to configure the hook points.

however! if I try to mount DEBUGFS, it fails:

~ # mount -t debugfs none /sys/kernel/debug
mount: /home/ga/x: unknown filesystem type 'debugfs'

Apparently this behaviour is governed by the kernel config option DEBUG_FS_ALLOW_NONE:
https://github.com/torvalds/linux/blob/56567a20b22bdbf85c3e55eee3bf2bd23fa2f108/lib/Kconfig.debug#L666C8-L671

Access is off. Clients get -PERM when trying to create nodes in
debugfs tree and debugfs is not registered as a filesystem.
Client can then back-off or continue without debugfs access.

So:

• Even if debugfs is configured in these hardened kernels, AFAICT it can't be used to mount the directory /sys/kernel/debug
• As we can't mount /sys/kernel/debug, we can't mount either /sys/kernel/debug/tracing/ (mkdir can't be used here)
• And finally, the paths to debugfs and tracefs are hardcoded in gobpf, so we can't configure them from opensnitch :/
  https://github.com/iovisor/gobpf/blob/16120a1bf4d4abc1f9cf37fecfb86009a1631b9f/elf/module.go#L248

[atomGit]

@moisesmsf - when you post that much content, consider using <details> tags...

<details>
<summary>SOME_TITLE</summary>
CONTENT_GOES_HERE
</details>

[atomGit]

@gustavo-iniguez-goya

$ grep FTRACE /boot/config-$(uname -r) <-- this doesn't work on Manjaro

also for Manjaro, the build file needs to be edited - an example path is /usr/lib/modules/6.9.0-1-MANJARO, so...

KDIR="/usr/lib/modules/$(uname -r)/build"

might be good to add this stuff to the wiki???