[email protected] (Andy Ruhl) writes:
>On Tue, Sep 25, 2018 at 8:49 AM David Young <[email protected]> wrote:
>> I added UDP encapsulation to gre(4) in NetBSD specifically to pierce NAT
>> firewalls, however, I don't know if Linux also has a UDP encapsulation
>> for GRE.
I haven't seen a Linux kernel implementation of RFC8086 (GRE in UDP),
but there is the Multi-Path Tunnel project on github that implements
it including the draft multipath extension for it.
>This is off topic, but it was alluded to earlier:
>I think it's possible for a router to forward an IP protocol inward
>via NAT, such as GRE? Or am I mistaken?
NAT sessions are usually only created dynamically for outgoing traffic and
since GRE has no session boundaries it's likely to be timed out then. But
a static NAT rule should be fine.
But then, some NAT routers will just drop GRE.
--
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Michael van Elst
Internet: [email protected]
"A potential Snark may lurk in every tree."
