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 From:  Falcor <falcor at netassassin dot com>
 To:  Martin Holst <mail at martinh dot dk>
 Cc:  m0n0wall at lists dot m0n0 dot ch
 Subject:  Re: PPTP MTU problem!
 Date:  Thu, 22 Jan 2004 07:11:33 -0600
Just to make sure:  Is your PPTP IP range (the range it issues PPTP 
clients) part of the same range you use for your LAN network(s)?

E.g. LAN =

Can your PPTP from the WAN access LAN computers/servers?
(sounds likt this probably isn't your problem, but just making sure.)

If this is an MTU issue.. then ewww, i dunno how to change it.  ;)   
 Can you test your PPTP from a digital connection to check?  

Martin Holst wrote:

>Probably a simple question, but I haven't been able to find anything in the
>PPTP-guide or on the lists.
>m0n0wall has two inside NICs: LAN for server/wired clients and DMZ for
>For security reasons access from DMZ to LAN is restricted to PPTP - this is
>working flawlessly.
>WAN access through the PPTP is a another issue however :o(
>The routing is fine - the problem is MTU related.
>WAN is routed Ethernet with MTU 1500 - but PPTP is PPP with MTU 1396.
>I have set m0n0wall to log anything coming through PPTP-interface, and I can
>see that 1400byte-packets are coming in on the PPTP-interface from the web
>servers I try to access.
>m0n0wall sends an "icmp unreach/needfrag" back - to no avail.
>Does anyone know a way around this?
>...IPSec is probably better, but PPTP was SO easy to setup on win2003 ;o)