From: Jerome Petazzoni <skaya@enix.org>
To: lartc@vger.kernel.org
Subject: Re: [LARTC] Help!! Cisco --> Linux Tunneling via NOS Encapsula
Date: Wed, 09 Jan 2002 10:34:24 +0000 [thread overview]
Message-ID: <marc-lartc-101057251713164@msgid-missing> (raw)
In-Reply-To: <marc-lartc-101051384924316@msgid-missing>
> I've searched the net for a little while and to me it seems like NOS is
> a normal ipip tunnel but using ipprotocol 94 instead of 4
[...]
> So if you change the value of IPPROTO_IPIP to 94 and recompile your kernel
> it should work.
it could be nice to have a iptables mangle target allowing arbitrary
modification of packets ... I believe the protocol field is at a fixed
offset, so that might work, or am I wrong ? it might also be possible
to tweak UDP packets to TCP packets and reversely, to bypass dumb firewalls
blocking UDP packets (but not doing stateful filtering). if that sounds
technically ok, I might write the iptables target to do that ... it should
be easy, anyway.
Jerome Petazzoni <skaya at enix dot org>
--
'I don't like to ask them questions.'
'Why not?'
'They might give me answers. And then what would I do?'
(Lords and Ladies)
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next prev parent reply other threads:[~2002-01-09 10:34 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-01-08 18:16 [LARTC] Help!! Cisco --> Linux Tunneling via NOS Encapsulation Juda Barnes
2002-01-08 19:01 ` Martin Josefsson
2002-01-09 10:34 ` Jerome Petazzoni [this message]
2002-01-12 23:10 ` [LARTC] Help!! Cisco --> Linux Tunneling via NOS Encapsula Juda Barnes
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