[Openswan Users] L2TP OS X/Windows problem

Lawrence Manning lawrence.manning at smoothwall.net
Mon Jan 18 06:45:17 EST 2010

On 15 Jan 2010, at 15:37, Lawrence Manning wrote:

> Hi,
> On 15 Jan 2010, at 15:16, Paul Wouters wrote:
>> On Fri, 15 Jan 2010, Lawrence Manning wrote:
>>> We've come into the old rightprotoport problem documented in a few
>>> places.  Basically if we change it too:
>>> rightportoport=1701/0
>>> The OS X client can connect, but the windows user cant.  Apparently
>>> this is fixed in openswan 2.4.10 but even with 2.4.15 we still  
>>> errors
>>> connecting with the windows client:
>> Use rightportoport=1701/%any
>> You might need to grab the _updown.netkey from openswan 2.6 and use
>> that
>> as _updown for 2.4.x. )or just upgrade to 2.6.24)
> Now the ipsec stage completes but I get the following from xl2tpd:
> xl2tpd[11856]: setsockopt recvref: Protocol not available
> xl2tpd[11856]: This binary does not support kernel L2TP.
> xl2tpd[11856]: xl2tpd version xl2tpd-1.1.12 started on
> smoothwall.local PID:11856
> xl2tpd[11856]: Written by Mark Spencer, Copyright (C) 1998, Adtran,  
> Inc.
> xl2tpd[11856]: Forked by Scott Balmos and David Stipp, (C) 2001
> xl2tpd[11856]: Inherited by Jeff McAdams, (C) 2002
> xl2tpd[11856]: Forked again by Xelerance (www.xelerance.com) (C) 2006
> xl2tpd[11856]: Listening on IP address, port 1701
> xl2tpd[11856]: control_finish: Peer requested tunnel 14 twice,
> ignoring second one.
> xl2tpd[11856]: control_finish: Peer requested tunnel 14 twice,
> ignoring second one.
> (etc)
> I get no such problems if I use 17/1701 as rightprotoport - ipsec is
> allowed through and xl2tpd fires up the pppd.  This is all using a
> Windows XP2 client.
> We are still on KLIPS here.  Any ideas what changes we need to make to
> the _updown?  Am really confused!

Bad form to reply to your own post, however...

Running 2.4.15 now (KLIPS) and have figured out what's cuasing the  
issue.  I just can't fix it. :(

When connecting with rightprotoport=17/1701, I get a nice route to my  
client: UGH   0      0         
0 ipsec0

So L2TP traffic travels down ipsec0, which is right.

But with rightprotoport=17/%any I see: UGH   0      0         
0 ipsec0

As this route.  The l2tp traffic travels down the ethernet, which is  
obviously not right.

Does anyone know how to fix this?  It's as if the %any is being turned  
into as the routing network....


Lawrence Manning
Lead Developer

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