Increase verbosity for PAM / SSH?

jnojr · 05-20-2015, 12:17 PM

There's an authenticated scanning system (not optional) that can no longer connect to my CentOS 6 virtual hosts. I can SSH in just fine. All the logs tell me is:

Failed password for user <username> from <IP address>

I need to know a little more than that. I don't know if this is an sshd issue or a PAM issue, but I need more information about WHY this is failing. The account is not locked or expired.

AlucardZero · 05-20-2015, 12:23 PM

It seems the password being provided by the client is bad.

You can stop sshd, then manually run /usr/sbin/sshd -ddd, then have it try to connect, for a lot of debug info.