Major problem with FTP/Telnet

[SCHCSteve]

I have 2 RS6000's running AIX 5. Everything worked fine until Monday. Now, users cannot FTP or Telnet into the servers. I can ping both servers just fine. I can telnet to them, but it takes about 3 minutes to get a login prompt from the time I press enter on the telnet command.

If I am trying to connect to them from a host on the same subnet as the servers, it works fine. I originally thought it was a routing issue, but everything seems to work, such as ping, etc.

When I netstat -r on the servers, it takes literally 30 minutes to display the routing table. It will scroll one route and then about 5 minutes later, it will scroll another one, and so on and so forth.

Any help would be greatly appreciated. If someone can help me with some diagnostic commands, that would be great.

I know little about AIX. We are running a Cisco 3600 switch that does the routing. Other RS6000's on that switch are not experiencing the problem, just 2 of them.

The servers are on a 172.20.8.x range. The client range is on 10.1.x.x range. No routing has been modified on the servers or the switches.

 

[AlbertAguirre]

This happened to me and I later discovered that the dns entries in my /etc/resolv.conf files were wrong.

i made the correction and we are back up to speed.

 

[spamly]

I agree with Albert. I think you'll discover it's a name resolution issue either with your DNS servers or your /etc/resolv.conf.

 

[jslee]

If you want avoid dns resolving delay(about 1 min)
1. change /etc/inetd.conf file.
like "telnet -ac "
2. refresh inetd.
refresh -s inetd

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