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Description
openedon Nov 1, 2024
Connecting to an agentless node with ssh can fail due to to capitalization in hostnames not being respected. However, teleport join openssh automatically sets the hostname to $(hostname) even if it includes capitalized letters.
> tsh ls
Node Name Address Labels
------------------- ---------------- --------------------------------------------------------------------
Brians-MBP-2 local.openssh:22 env=dev
> ssh -v Brians-MBP-2.root.example.com
OpenSSH_9.8p1, LibreSSL 3.3.6
debug1: Reading configuration data /Users/bjoerger/.ssh/config
debug1: /Users/bjoerger/.ssh/config line 19: Applying options for *.root.example.com
debug1: /Users/bjoerger/.ssh/config line 26: Applying options for *.root.example.com
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 21: include /etc/ssh/ssh_config.d/* matched no files
debug1: /etc/ssh/ssh_config line 54: Applying options for *
debug1: /etc/ssh/ssh_config line 58: Applying options for *
debug1: Authenticator provider $SSH_SK_PROVIDER did not resolve; disabling
debug1: Executing proxy command: exec "/Users/bjoerger/src/gravitational/teleport/build/tsh" proxy ssh --cluster=root.example.com --proxy=root.example.com:3080 bjoerger@brians-mbp-2.root.example.com:3022
debug1: identity file /Users/bjoerger/.tsh/keys/root.example.com/dev type 0
debug1: certificate file /Users/bjoerger/.tsh/keys/root.example.com/dev-ssh/root.example.com-cert.pub type 4
debug1: Local version string SSH-2.0-OpenSSH_9.8
ERROR: failed connecting to host brians-mbp-2:3022: failed to receive cluster details response
failed to dial target host
direct dialing to nodes not found in inventory is not supported
kex_exchange_identification: Connection closed by remote host
Connection closed by UNKNOWN port 65535
I have to manually tctl edit nodes/Brians-MBP-2 to change the name to lower case and fix it, or use another join method.
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