[Openswan Users] RDP connection slow

[Paul Wouters]

On Wed, 1 Feb 2006, Andreas Lüdtke wrote:

> > Trying setting the MTU on your ADSL interface to 1400 in the
> > ifcfg-ethx file.
> >
> > MTU=1400
> >
> > We had a similar problem when two IPSEC networks, hooked
> > together via ADSL (on each end), had odd MTU's.
>
> I tried this: I set "ifconfig ppp0 mtu 1400" but that didn't help. I also tried a mtu of
> 1100...

Did you try setting the *other* ends mtu to 1400 or 1100?

> Any other idea? Is it possible to set the mtu for the ipsec tunnel?

For KLIPS you can use overridemtu=1400. For NETKEY you will need to set the
physical interface's mtu, or do some advanced routing hacks
(I believe something like: ip route add src foo dest bar mtu xxx)

Paul