What to tell other firewall admins re. VPN ports?
- From: Mike Anderson <manderson@xxxxxxxxxxxxxxxxxxx>
- To: "'isalist@xxxxxxxxxxxxx'" <isalist@xxxxxxxxxxxxx>
- Date: Thu, 7 Mar 2002 09:53:08 -0700
Hey everyone -
I have an external department that needs to access an application on my
network. I have had great success setting up VPNs (Thanks to Tom and Debra
for the great book) with my ISA server from home, DSL's, etc. My problem
with this account is that they are behind a firewall of their own. I do not
know what kind of firewall and it is not one that I administer, but they
need to open up ports to allow VPN access to my server. The question is
what do I tell them to open?
Do I need them to open IP Protocol 47 (GRE) and TCP port 1723? Inbound and
outbound? I don't want to look like an idiot and tell them to open something
they don't need, but I also need to make sure it will work.
Thanks in advance,
Michael Anderson, MCSE
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