[Openswan Users] Trouble with L2TP and NAT traversal

[Jacco de Leeuw]

Nels Lindquist wrote:

> The "Advanced Networking Pack for Windows XP" is listed in Add/Remove 
> programs, but that isn't it, right?

I don't think so. That description doesn't ring a bell, to be honest.

> I went to Windows Update, but L2TP/IPSEC Update is not listed under 
> recommended updates, and when I do an advanced search in the catalog 
> for article 818043, there are no results.

The update only shows up in the catalog if SP1 is installed. So perhaps
that is the problem?

> What exactly does IPSEC passthrough refer to?  My assumption would be 
> port-forwarding UDP 500 and protocols 50/51 to the NATted device, 
> which is definitely not happening.

No, it's a feature of some NAT devices, before NAT-T existed.
In fact, it is incompatible with NAT-T.

Jacco
-- 
Jacco de Leeuw                         mailto:jacco2 at dds.nl
Zaandam, The Netherlands           http://www.jacco2.dds.nl