Hey All,
Recently did an upgrade at our office and our PPTP tunnels broke. We are just using it for basic ingress from remote computers and nothing fancy - its been working for years.
I did an upgrade after a long time to 6.4x.x and my links broke. I opened a connection to an office running 6.35.4 and it worked no problem. I found MTU settings were different in both offices and was able to get it to work on the 6.4x office if I lowered the MTU to about 1300. I put it back to 1450/1450 and downgraded the config to 6.38.x - same issue. I downgraded further to 6.35.4 and it worked again.
Unless something is really wrong, I think there is a bug in the PPTP servers on newer bulilds bridging to the local network?