North American Network Operators Group
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Re: GRE packets

  • From: Perry E. Metzger
  • Date: Wed Jun 17 21:36:50 1998 
Sean Donelan writes:
> I tend to view GRE tunnels like any other traffic.  A tunnel to/from any
> of my customers is like any other traffic to/from those customers.  However,
> a tunnel between two end-points, neither of which is on my network, is a
> form of third-party transit traffic and gets blocked when I figure out the
> new way they are doing it.  I know, in theory you can encapsulate anything
> in anything.

Moreover, if IPSEC is in use, you can't even sniff.

.pm