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Exchange 2003 ports

I have exchange 2003 sp2 and I need some to type in the ports I need to have open for it.

I found an article from microsoft but really don't understand which ones I need open for my external firewall. So can someone please list the ports.

I am using pop3 connector, activesync(not sure if it is installed I need it though), smtp, outlook via the web.

this is for SBS windows and I am not sure if anyone knows what ports are needing for that too.
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The only ports that you need open to the internet in these circumstances are 80 (http) and 443 (https). If you were not using the POP3 connector but had email delivered directly, then you would also open port 25 (smtp).

If your router is UPNP compatible then SBS will do it all for you.

piperboyAuthor Commented:
what is router is UPNP???

our router controllers all the settings, not sbs
Universal PnP: http://en.wikipedia.org/wiki/Universal_Plug_and_Play

It allows an application, like SBS, to control the configuration of the router automatically.

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