SSH agent forwarding on debian squeeze

Posted by nfvindaloo on Server Fault See other posts from Server Fault or by nfvindaloo
Published on 2012-11-25T21:52:08Z Indexed on 2012/11/25 23:08 UTC
Read the original article Hit count: 231

Filed under:

linux

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ssh

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ssh-agent

Im trying to set up SSH forwarding like this

osx > debianA > debianB

I can connect to debianA fine, using ssh -A and it has the following env vars when i do:

SSH_AGENT_PID=1543
SSH_AUTH_SOCK=/tmp/ssh-giwdYY1542/agent.1542
SSH_CLIENT='92.233.199.x 38954 22'
SSH_CONNECTION='92.233.199.x 38954 108.171.179.x 22'
SSH_TTY=/dev/pts/0

When i try to connect to debianB, the agent is not used!

ssh -v output ends with:

debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: publickey
debug1: Trying private key: /home/nic/.ssh/id_rsa
debug1: Trying private key: /home/nic/.ssh/id_dsa
debug1: Next authentication method: password

Then im asked for a password.

I have not set any ForwardAgent no directives in ssh_config and dont have a .ssh/config at all. sshd_config has not got AllowAgentForwarding in it. I have tried all of these directives as yes also.

debianA and debianB both have identical ssh_config and sshd_config (verified with diff) so the really weird thing is connecting OSX > debianB > debianA works fine!!

Im totally out of ideas! Has anyone come across this before?

Cheers! NFV

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