How to Check the Open Ports in a remote Linux Server
 

Hi All,

I need to check whether a given list of ports are open in a remote linux server. Currently I am using telnet command from windows command prompt. Since I need to check for quite a lot of ports in various servers, I would like to know is there any way that we can do it quickly, something like a shell script or batch program.

Advance thanks!!

Regards,
S. Kumaran

nmap is a great tool for scanning network ports. Note that "open" can mean a fair few different things though. a port isn't open until somethign is actually listening on that port, AND iptables allows the external connection through to it.