Ports used by Exchange Server

[mourikise]

Hi,

I want to set up a firewall (Linux 2.2.14 - ipchains). I need to know what ports to leave open so that the Exchange server can communicate with my LAN. NetBIOS is working (I can browse the mail server through Network Neighbourhood), but when I open Outlook I wait about 1 min to receive a message that Outlook cannot communicate with Exchange server (when I drop firewall everything is working fine). I 've read somewhere that there is a key in the registry that sets the port that Exchange use but I don't want to mess with registry (especially on a server). Any links?

[kent]

This one has an answer that depends. You will probably need at least 111 (RPC portmapper). Then the netbios 135, 137,139 ports. If you're using POP3, then you'll need 110. If you're using the public folders, you'll need 119. If you're using IMAP4, you'll need 143.

Check to make sure the connection problem isn't that your Exchange box is firewalled, too. A lot of sites put their Exchange boxes behind mail relays and actually fw off the Exchange box because of MS security level.

Good luck!

[mourikise]

Thanks kent,

That was more helpful than I could expect! I haven't tried it yet (I was too buisy writing exams) but I think that's all I need it to make my firewall working. Thanks again!