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Accepted
Cerber
Asked: 2015-08-07 00:39:35 +0800 CST

How to get/dump ssh client effective configuration without connecting

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Question

Is there an equivalent for ssh to sshd -T (or, for those who know, something like maven's mvn help:effective-pom) ?

I'd like to be able to see the effective configuration that will be applied to an ssh command without having to / being able to connect to the remote host

Context

I've got batches with command line arguments, user local ~/.ssh/config and global /etc/ssh/ssh_config that bring nightmare config extrapolation problems.

Eg. command is failing because global config is forcing the remote port to the wrong ssh daemon / changed the remote username / changed the remote hostname /

ssh

1 Answers

  1. Best Answer

    In versions prior openssh-6.8 there is no way except -Q option, which is available only for [-Q cipher | cipher-auth | mac | kex | key]. You can get only some basic information about parsing ssh config during login with -v switch.

    In openssh-6.8 and newer, there is switch for ssh, -G, which does the same as -T for sshd.

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