I am having a problem allowing a client inside of my network to connect to a remote Server running VPN services. The problem seems to be that the request goes out from this client but when trying to get a reply from the VPN Server it can't get thru my ISA Server. I do have this server setup as a Proxy. I opened ports 1701 UDP, 1723 TCP for L2TP Traffic. I also opened ports 4500 udp, and 500 udp for IPSEC traffic. I also enabled "pptp through ISA firewall".
Any help would be appreciated.