Hi all. I have a question about allowing routing protocols to go thru the
firewall. Specifically, someone asked me about GRE, the Generic Routing
Encapsulation protocol. Apparently this is used to encapsulate one
protocol into another.
To me, this could lead to allowing data types thru the firewall where we
wouldn't normally allow.
Also, it has been stated that unless we allow this GRE thru the firewall,
we would have to allow only one port thru the firewall. Otherwise, a
whole number of ports would have to be opened.
Thanks,
Dave
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