I have a Ubuntu 12.04 server with a hostnames 'example.org' and 'sub.domain.com', and some IP x.x.x.x, and with
On one client computer, I can SSH into my server at email@example.com, firstname.lastname@example.org, and email@example.com. On another client however, I cannot SSH into firstname.lastname@example.org.
Furthermore, upon digging into the server
/var/log/ files, there are no logs for the second client attempting to log in via email@example.com. This is also evident in that
fail2ban does not ban the second client upon multiple failed password attempts at firstname.lastname@example.org.
ssh -vvv email@example.com on the second client, the last debug message just says that the client is talking to the server - and then is denied.
Is there any way for me to further debug the issue on the server, or something that I'm missing?
Edit: I should also note that the hostname is resolving properly on all machines -
wget all appear to work correctly when attempting to resolve example.org.