topic Re: How can i find which are the ports open on Redhat. in Operating System - Linux

How can i find which are the ports open on Redhat.

Silver_1 — Wed, 12 Jul 2006 12:45:44 GMT

Gurus,

Which option of netstat will help us to know this ?

Tx.

Ivan Ferreira — Wed, 12 Jul 2006 13:12:13 GMT

You can use netstat -an, you will see the tcp ports in the LISTEN state and the udp ports open.

You can also use nmap to check open ports remotelly.

Silver_1 — Wed, 12 Jul 2006 13:25:56 GMT

Thanks Ivan

dirk dierickx — Thu, 13 Jul 2006 02:50:05 GMT

and lsof is also able to list ports.

David I Whitehouse — Thu, 13 Jul 2006 03:07:59 GMT

You could also port scan the server from the network with something like NESSUS http://www.nessus.org/

Thomas Callahan — Thu, 13 Jul 2006 08:17:59 GMT

use `netstat --listening` for local, and nmap for remote.