On 3 March 2010 13:46, hadi motamedi <motamedi24 at gmail.com> wrote: > > >> >> >> All ports are open, but you really need some service to listen that port. >> >> -- >> Eero >> _______________________________________________ > > Thank you . So why 'telnet 172.16.17.132 4965' cannot get through ? As Eero said, you need to make sure something is listening on that port. Try: netstat -ant and look for: Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 0.0.0.0:4965 0.0.0.0:* LISTEN or pipe it to grep if the server is busy (netstat -ant | grep 4965) Regards, Andrew.