Sergey V. Dyatko: > use `sockstat -l4 -p783` instead. It show you what user-command-pid > listen that port USER COMMAND PID FD PROTO LOCAL ADDRESS FOREIGN ADDRESS root perl 1404 5 tcp4 127.0.0.1:783 *:* root perl 1403 5 tcp4 127.0.0.1:783 *:* root perl 1402 5 tcp4 127.0.0.1:783 *:* Is this Perl itself or is this a program that uses Perl for this port? wbr, Jos