* iptables and 2.5.* ipsec
@ 2003-05-14 9:53 Andreas Jellinghaus
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From: Andreas Jellinghaus @ 2003-05-14 9:53 UTC (permalink / raw)
To: netfilter
Hi,
How does 2.5.* ipsec and netfilter interact?
I guess this way, but I'm not sure:
(encrypted) network card -> routing -> INPUT -> decrypt
(decrypted) ipsec -> routing -> INPUT/FORWARD
A normal packet is processed this way:
ipsec -> routing -> INPUT/FORWARD
The first is easy to see: proto 50 or 51 (or udp port 500 for ike).
But how can I see whether an unencrypted packet came in unencrypted
or came in encrypted via ipsec?
with freeswan I could match -i ipsec0, but with kernel 2.5.* there
is no ipsec0 device. What shall I use instead? fwmark?
Thanks for your help.
Regards, Andreas
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