[Openswan Users] XL2TPD/Double NAT issue

Paul Wouters paul at xelerance.com
Thu Oct 11 09:28:52 EDT 2007

On Thu, 11 Oct 2007, Gerald Vogt wrote:

> > 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:
>   1500

That's odd. It is perfectly legal. Odd also, is that "ilegal" is speled wrong...
The only place google finds that misspelling is on the Openwrt site:

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

That's not a normal kernel/driver then. Contact whoever made that kernel/driver?

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

You compiled the kernel yourself? Perhaps you missed out on something
that is causing this?


More information about the Users mailing list