Where does linux kernel ipsec hook in

Where does linux kernel ipsec hook in

[Johannes Kleimola]

Hi!

This may have been asked before, but could somebody tell me where does

  1) linux 2.6 kernel ipsec (encrypt and decrypt) and
  2) linux packet sniffers (tcpdump, ethereal)

hook in all the diagrams of page:

http://www.faqs.org/docs/iptables/traversingoftables.html

Thank you very much for help!

  >> Johannes <<

Re: Where does linux kernel ipsec hook in

[Aleksandar Milivojevic]

Johannes Kleimola wrote:
>   1) linux 2.6 kernel ipsec (encrypt and decrypt) and

I remember seeing answer to this one on the list a while ago, check the 
list archives.  Vaugly remeber that it goes through the Netrilter twice 
(encrypted, and than unencrypted).  But don't remember if it was for 
*swan, linux native implementation, or both.

>   2) linux packet sniffers (tcpdump, ethereal)

Packet sniffers always give you packets as they arrive from the wire, 
and as they leave to the wire, since they work by opening device 
directly.  So, in table 3-1 it would be part of step 2, in table 3-2 
part of step 8, and in table 3-3 part of steps 2 and 10.

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Aleksandar Milivojevic <amilivojevic@pbl.ca>    Pollard Banknote Limited
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