This has been addressed several times on the list. Here is a link to
another discussion that covers this. The short answer is that it is a
limitation with the GRE protocol and NAT.
> -----Original Message-----
> From: Sandro Kehrlein [mailto:sandro at kehrlein dot de]
> Sent: Thursday, December 22, 2005 10:47 AM
> To: m0n0wall at lists dot m0n0 dot ch
> Subject: [m0n0wall] Problem with VPN
> Hello List,
> i've a m0n0wall at home and often connect me to my office via
> vpn (pptp).
> if i try to connect from one pc at home to connect, no
> problems. if i disconnect this connection and go to another
> pc at home, trying to connect again with my office from this
> different pc, i got the error 721. i can not connect to the
> office until i reboot my m0n0wall. if i did that, i can
> choose a pc to login into office again. then going to another
> pc one more time, i cannot connect.... it's like a circle....
> the reason is: if i like to connect me from another pc, i
> always have to reboot my wall.
> does anybody have the same problem or knows how to "work-around".
> thanks a lot for helping me!!
> bye, sandro