I have a vpn sitting on a Win2k3 R2 server behind a Cisco 1841 router to a T1. I’m using a pptp setup. I can connect fine until I put filters in place. Then, after 5 minutes, I can no longer connect to the vpn from the outside. If I reboot the server or disable/enable the wan adapter, I can one again connect for 5 minutes. The filters are on incoming packets only:
For all filters
Src Addr: Any
Src Mask: Any
Dst Addr: WAN adapter IP
Dst MasK: 255.255.255.255
For TCP:
Src: Any
Dst: 1723
For GRE (Prot 47):
Src: Any
Dst: Any
For TCPest:
Src: 1723
Dst: Any
This setup worked fine and is still working on a DSL line. It seems like I must be missing a protocol or something associated with the T1.
Any help would be greatly appreciated.
