[expert] Cannot Telnet

[LINK WORLD]

Dear Support,

 I cannot telnet to my system. I have a rtl100a Compex card which seems to work fine
(because I can telnet to another system on the network). If I try to telnet to this
system from anywhere on the lan (including this system itself) I get "CONNECTION
CLOSED BY FOREIGN  HOST".

Please help
SUNIL GUPTA