linux ssh, putty problems
 

I recently changed the IP addresses of my linux computers. I can ping the computers no problem. I can ssh and putty into some of the computers by using the IP address. I can't ssh or putty into any of them by using the name. Some of the computers I can't ssh or putty into at all using the IP or the name. All of the computers are working fine if your actually sitting there and using them. If you do a ping scan you can see the IP's and there names. Any suggestions??

You changed the IP addresses. Did you change any naming service (DNS, NIS, /etc/hosts) on the affected client nodes?

There's nothing simple like bad iptables on the target nodes? sshd is running? Is there anything in the affected target nodes log files?

the dns server was changed over as well. Like I said if you do a ping sweep you can see the name of the computer along with the IP. Yes ssh is running on all computers. Which log files are you referring to??

What is the error message that you get when you try? Are you refused access? You just say you can't but what actually happens?

I either get unknown host when i go by hostname or host is unreachable when i go by IP

Sounds like a iptables sending you a REJECT result. Look in /var/log/messages and use the command dmesg.

On the server, check iptables:

# iptables -nL