Hello All, If this has been covered I apologize. I haven't found this issue on isaserver.org. I'm trying to run IPSec/VPN client connection through a D-Link DSL/cable router. The connections have been verified with PPTP. L2TP has been verified with a direct connection to the ISA external I/F but after adding the D-Link NAT router the connection barfs with err 791, L2TP failed because the security policy was not found. Config 1. Works for both L2TP and PPTP workstation -> ISA -> LAN Config 2. PPTP but no L2TP WS -> NAT-Router -> ISA -> LAN I only know a thimble full about IPSec, so my first question is are there any recommendations for a reference that is somewhere between the RFC and the dummies books? Also if anyone can shortcut me to the direct answer, that would be appreciated as well. Thanks, Brian