VPN

Hello All,

I am using m0n0wall 1.23 generic pc on CF with the MPD patch installed. My PPTP client is Windows XP. I'm establishing the PPTP tunnel over a CDMA broadband connection. The MTU for the PPPD device on my XP client is set to 1200. I can connect via PPTP and establish an RDP session fine and I can ping the RDP server with a 1200 byte packet using the command ping -ln 1200 10.10.44.27. If I log off and try to log on to a new RDP sesssion over PPTP, I get a blank screen. If I ping the RDP server with an 1100 or 1125 byte packet, I get a reply. If I ping the RDP server with a 1150 byte packet, I do not get a reply. If I reboot the m0n0wall I get back in fine, but the problem starts again after the first connection. Resetting the firewall state does not help. I'm at a loss here, so any recommendations would be appreciated.

Thanks,

Chris

I had a similar problem with connectivity over VPN.
I've resolved the Issue after I allowd fragmented packets from the pptp interface to the lan segment.

I would say heldopsokken is accurate on what he says. The standard MTU is 1500 and it sounds like your firewall is dropping the fragmented packets once the connection is established. Try checking the allow fragment packets option.

Thanks for the tip guys, I'll give that a try and report back.