How to open ports in a Linux firewall?

[Mateo1041]

Greetings,

Our organization recently installed eTrust Antivirus on our Windows NT 4.0 based system. However, it is unable to automatically download new virus signatures due to ports 2021 and 1024 probably not being open on our Linux-based firewall.

I must admit I'm new to ports and firewalls. What would be the easiest and more efficient way to open these two ports on our Linux firewall? I've heard something about an IPTable? I can navigate ok in Linux and know some things, but I'm by no means an expert.

Any nudge in the right direction would be much appreciated. I've scoured the web yesterday and it perhaps made me more confused than I was before.

Please note: I have also posted this in the FreeBSD server forum. However, this forum appears more appropriate perhaps as I'm talking about general port opening under Linux.

- Matt.

 

[sleipnir214]

IPTables is the standard firewall built into the version 2.4.x Linux kernel.

IPTables began life as a project called NetFilter. Go to the NetFilter homepage and poke around in the tutorials section.

Want the best answers? Ask the best questions!

TANSTAAFL!!

 

[hn4810]

Check /etc/services file.
--> add the port you want to open