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

[Silver_1]

Gurus,

Which option of netstat will help us to know this ?

Tx.

[Ivan Ferreira · Accepted solution]

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]

Thanks Ivan

[dirk dierickx]

and lsof is also able to list ports.

[David I Whitehouse]

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

[Thomas Callahan]

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