[Openswan Users] XL2TPD/Double NAT issue

Gerald Vogt vogt at spamcop.net
Thu Oct 11 04:16:56 EDT 2007

Paul Wouters wrote:
>> Could this be an MTU issue? It is kind of weird that xl2tpd gets a
>> read-ready in select() on a socket but the next recv reports it would
>> still block. Or is this a kernel issue?
> It could be. Did you try setting the ethX mtu to  1472?

I think I am doomed. This box gives me a lot of headache. When try to 
change the MTU with

ifconfig eth0 mtu 1472

I always get an error:

localhost kernel: eth0: Ilegal MTU value 1472,  rounding MTU to:

It does not matter what I set it will only accept 1500.

> Did you also ensure the firewal was off, just in case?

On the server the firewall is not even compiled into the kernel. 
Everywhere else it is off.


More information about the Users mailing list