[Openswan Users] NAT-T

Oliver Tomkins oliver.tomkins at alliedvehicles.co.uk
Fri Mar 24 16:27:26 CET 2006

> I assumed you were talking about running tcpdump on your vpn server, not on
> your router.

so I'm less confused now!

>> Also I see this in /var/log/secure
>> ERROR: asynchronous network error report on eth0 (sport=500) for message to
>> (client IP) port 4500, complainant (gateway): Connection refused [errno 111,
>> origin ICMP type 3 code 3 (not authenticated)]
> Seems there is some confusion about ports. Are you forwarding both port 500 and
> 4500? Does the IPsec SA Estbalished message show a NATD= entry with a port?

I'm a little unsure of what you mean by forwarding both ports?

NATD is as follows:

pluto[2132]: "note"[1] XX.XXX.XXX.XX #6: STATE_QUICK_R2: IPsec SA 
established {ESP=>0x60b11015 <0xeb54ec4a xfrm=



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