Subject: Stripping GRE Too Early?
To: None <>
From: Curt Sampson <>
List: tech-net
Date: 01/06/2000 16:38:57
It seems that under NetBSD 1.4.1, at least, when you set up a gre tunnel
between two machines, the `real' interface that the tunnel's packets pass
over is showing de-encapsulated incoming packets to bpf, ipfilter, etc.
(Outgoing are shown encapsulated.) Here's an example:

16:33:38.755359 > icmp: echo request (gre encap)
16:33:38.788769 > icmp: echo reply

What's up with this? Does current still do it?

Curt Sampson  <>   917 532 4208   De gustibus, aut bene aut nihil.
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