Re: iptables, ipsec, and host2host

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On Tuesday 2009-02-17 19:23, Patrick McHardy wrote:
> Joe Pruett wrote:
>> trying this again on the -devel list.  the basic question i'm trying to answer
>> is if there really isn't a way to filter esp/ah packets after
>> decryption/decapsulation in host2host mode.  i've looked at what i think is
>> the current linus kernel and don't see any changes to esp/ah handling to
>> address this.  is tunnel mode the only way i can do filtering on the packets
>> after ah/esp have done their work?
>
> Packets in both tunnel and transport mode traverse the netfilter hooks
> after decapsulation and before encapsulation. From a users POV there
> should be nothing special about it.

Precisely, see http://jengelh.medozas.de/images/nf-packet-flow.png .
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