Vanco, Don wrote:
I've got a RHEL 5U1 server I access via SSH (and NoMachine NX over SSH) by IP address over a corp. VPN. It's addressed via DHCP. No firewall, SELinux disabled. I keep getting disconnected with innocuous client-side messages of "network connection" issues. If I try to connect again immediately, I get a warning that the RSA hash has changed and cannot log in (get login prompt, but auth fails). If I wait a few moments before trying to reconnect, I have no issues. I see nothing in any of the logs. The "secure" log shows warnings about reverse look-ups on my client, but that's it. Does this sound like another server stepping on my IP? I see nothing to support that... so I'm wondering if this odd RSA issue has something to do with the NoMachine daemon resetting itself in some fashion... or if it's some kind of SSH bug. TIA Don
NoMachine (when configured to use pam) just uses the underlying sshd to connect. So connecting via ssh and via NoMachine is the same thing. If you are connecting to the server and the RSA hash has changed, then you are being connected to an sshd with a different key. I'd look for load balancers and/or proxy servers between you and the server. You can also capture the different RSA hash and compare it against keys that you have for other machines at your work.
Hugh
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