I have an Exchange 2003 (SP1) single server that I have configured for RFC or HTTP. It works great if we are inside the firewall, but outside, it never
connects. I know it is a firewall issue because we turned the firewall off
for the IP of the server.
My question is: what ports are required to be open for RFC over HTTP?
I had the following ports open: 110, 995, 25, 143, 993, 80, 21, 443, 691,
389, 3268, 88, and 135.
We actually run SurfControl on the server, so it is listening on port 25
while Exchange is set to listen on port 26. Do I need to open port 26? Is
there anything I am missing?
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