While trying to connect to FTP server the following error message is shown:

If you run proftpd –configtest and the following errors will shown:

It will shows :-

proftpd[16708]: warning: unable to determine IP address of ‘hostname.com’
proftpd[16708]: error: no valid servers configured
proftpd[16708]: Fatal: error processing configuration file ‘/etc/proftpd.conf’

Reason:-  Your Server hostname in ‘/etc/hosts’ file was not configured properly.

Sol:-
Set your hostname correctly as mentioned below :-

127.0.0.1               localhost.localdomain localhost
5.77.37.51              hostname.com  hostname

Then again run :-

[root@server src]# proftpd –configtes
Checking syntax of configuration file

Restart your “xinetd service” thats all 🙂