I have successfully setup a PPTP server on my RB750GL and can connect to it. However, I cannot access any LAN devices and there doesn't seem to be any traffic going out from the RB750 to my PPTP client.
I basically turned on the PPTP server and set up a secret with username and password, using the default-encryption profile, and put in a local and remote address which are on my LAN subnet.
At this point I can connect, but nothing seems to make it back to my client. I can see that my pings are coming through the dynamic pptp interface on the 750, but nothing comes back. It looks like they may be going out the WAN interface instead.
I believe my default drop rule for the forward chain is killing the tunnel. I'm not sure how to properly fix this though. It seems that once the packet comes out of the tunnel it doesn't match against gre so my attempt at a forward rule fails.
Does someone know how to properly allow pptp traffic to get back out to the client?