Telnet server slow
 

Hi all..


Here at the company that I work we have a telnets erver, to with connects linux machines via netterm and linux machines too, when we change the linux version of the server, we start to have this strange problem: some machines, that includes linux and windows, when I try to connect to the telnet server, it stops for 15-30 seconds, and them connect. Others machines when you try to connect It connects in less than 1 second.

Does someone knows what is happening???

This happens because telnet does a reverse DNS lookup for the client that tries to connect. So it takes time if the IP cannot be resolved. You can either put the names of the "slow" machines in your DNS server, or in the /etc/hosts file of your server.