> I'm trying to set up a PPTP connection between two LEAF:s, it's as a
backup
> for an existing direct router connection between two offices.
> The PPTP connection established between the LEAF:s and ping shows ok, but
> when doing high traffic the timeouts are BIG.
> If I try to do the same PPTP over our existing WAN it's work perfect.
> Could it bee a MTU, MRU problem which results in fragmented packets?
> Ping packets size way under the MTU works, but packet near MTU are dropped
> or times out.

I've not run into these problems personally, but I've seen a lot of folks
have MTU problems on the FreeS/WAN list.  Even though you can't run IPSec,
you might want to browse the list archives for MTU related problems...

IIRC, some things you might want to check:

- Make sure you're allowign ICMP through your firewalls.  While it's OK to
block re-direct messages, if you dump all ICMP, you'll be missing dropped
packet notifications and MTU exceeded messages

- You can sometimes fix things by forcing the MTU on the VPN Gateway.

- Probably several other things I've forgotten, since I haven't run into MTU
problems yet...

Charles Steinkuehler
http://lrp.steinkuehler.net
http://c0wz.steinkuehler.net (lrp.c0wz.com mirror)


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