Re: port-based filtering of ESP packets with in-kernel IPsec?

[Dax Kelson <dax@xxxxxxxxxxxx>]

On Wed, 2003-07-30 at 14:37, Dax Kelson wrote:
> On Wed, 2003-07-30 at 08:51, Andreas Jellinghaus wrote:
> > [netfilter]
> > incoming encrypted packets are seen as ESP/AH in INPUT
> > and then as decrypted packet in INPUT or FORWARD.
> 
> Just to clarify, the packets will travel INPUT *twice* (once as ESP and
> then in the clear)?

If this is the case, then I see a problem.

If you have an explicit drop/reject all the bottom (or have a DROP
policy) of INPUT then no IPSEC traffic would be allowed.

I supposed you could add a rule that allowed all ESP traffic before the
the explicit drop.

Dax