packet-filter

NPF: packet filter with stateful inspection, NAT, IP sets, etc.

The first and only publicly available Minecraft XDP Filter, protecting your server from layer 7 DDoS attacks

UTM Firewall on OpenBSD

Software networking with isolation for Tart

A simple packet filtering firewall for Linux

PF Firewall on OpenBSD

A network security policy compiler. Netspoc is targeted at environments with a large number of firewalls and admins. Firewall rules are derived from a single rule set. Supported are Cisco IOS, ASA, Palo-Alto, VMware NSX gateway firewalls and IPTables.

PF (Packet Filter)

This program allow you to extract some features from pcap files.

Add-ons for the OpenBSD web server

🐡 ⚙️ Personal config files, handbook and more.

Packet Filter Rule Editor for OpenBSD/pf

Distributed XDP/eBPF firewall with wire-speed packet filtering and a central management controller.

Advanced library for packet processing. Includes NetVM, NetPDL, and NetPFL.

macOS / Windows 10 Telemetry filter

OpenBSD daemon primarily used to build and maintain dynamic firewall blocklists

Packet filter written in Rust

Experimental NFQUEUE-based TCP connection pacing daemon with pluggable cooldown algorithms.

A small Python script used to help network administrators to generate PF (Packet Filter) rules to block a bunch of hosts

Kill switch for macOS that works with any VPN app (WireGuard, OpenVPN, IKEv2…): the Mac reaches the internet only on networks you trust, through a VPN tunnel, or not at all. Uses the built-in pf firewall, a small Go daemon and a menu bar app. Install with Homebrew.