tcpdump and ipsec

Bjoern A. Zeeb bzeeb-lists at lists.zabbadoz.net
Mon Apr 17 19:35:11 UTC 2006


On Thu, 13 Apr 2006, Kelly Yancey wrote:

> I'm curious: how are you performing NAT on your tunnelled traffic?

the answer is simple: do not NAT on the ipsec interface though it's
not fully correct because I do even NAT traffic that goes like:

A ---- lan1(ipsec only) --- gw(NAT) --- lan2(ipsec only) ---- B

[ipsec only == esp and ike allowed]

so the better explanation perhaps is:
do not nat on the ipsec interface of the outgoing direction.

-- 
Bjoern A. Zeeb				bzeeb at Zabbadoz dot NeT


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