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Which ports need to be opened to allow Outlook / Entourage through firewall?

C

Cooky

Golden Member
We recently implemented an ACL to protect our datacenter against certain less secure VLAN's from remote sites.
Sure enough that broke users' Exchange access.

Anyone know exactly which ports I need to open to restore the service from Outlook and Entourage?

This site has a list of the ports used by Exchange 2003.

However, Microsoft site says the ports are randomly selected...

This site also has a different list of the ports used.

So now I'm not sure which ones I need to open...
 
Screw them all and use RPC over HTTP to gain access to Exchange from outside the secure zone. Now known as Outlook Anywhere in Exchange 2007.
 
As drebo notes, it'd be simplest to just set all the Outlook clients to use "RPC over HTTPS" (now called Outlook Anywhere).

I don't have any Entourage clients now, but this discussion might be a good starting point. Historically, I believe that Entourage used HTTPS / WebDAV to talk to the Exchange server across an internal network.

Eriq Neale "wrote the book" on using Macintoshes in a Server 2003 environment:
Eriq Neale's comments

"Entourage uses HTTPS and WebDAV to communicate with the Exchange server, so port 443 is the only port you need open to allow an external Entourage box to connect with the SBS Exchange server."
 
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