RHEL3 server with RHEL4 client problem

5555collier · 03-30-2009, 11:52 AM

I had to rebuild a machine that was authenticating through a RHEL3 server. The machine was previously running a RHEL3 client but I upgraded it to RHEL4 and kept the same ip. I can log on to a local account and ssh out of the rebuilt machine but when I try to ssh into it, I get a "no route to host port 22" error. It will also not authenticate through the server even though I configured it for the domain just like before. Is there any trick to using RHEL4 client?, or am I just missing something really simple (again).
thanks

miedward · 03-30-2009, 12:06 PM

Define "authenticating through". LDAP, Active Directory, shared passwd files?

5555collier · 03-30-2009, 12:10 PM

Through NIS

miedward · 03-30-2009, 12:20 PM

It seems you have two problems

1) You can't ssh to the RHEL4 box.

-Turn off/open ssh port in the firewall?
-Check /etc/hosts (and/or DNS settings) on both machines and make sure they know about the other.

2) Can't authenticate through NIS.

-Try running "authconfig" on the command line and check your NIS settings.
-Check your /etc/nsswitch.conf file for the correct settings.

5555collier · 03-30-2009, 01:09 PM

I don't have firewall enabled and /etc/hosts and DNS settings are all correct. NIS is enabled with the correct domainname. I can even ypcat passwd and all the info is there. nsswitch.conf is also correct.

5555collier · 03-30-2009, 02:45 PM

Solved the logon authentication problem. I had the ip address and it was looking for the hostname of the server. Still have the "can't ssh into the machine" problem though, port 22 no route to host.

5555collier · 03-31-2009, 09:30 AM

I found out the problem. Even though when I installed RHEL4 and did not select the firewall, somehow it was running. I turned it off and ssh is now happy. Thanks to miedward for the suggestions, it pointed me back in the right direction!!

miedward · 03-31-2009, 11:00 AM

Glad to hear you figured it out!