Hi all, I've got a question about setting up a Server to Server VPN. I followed the example in the back of Tom's book to set up a VPN between to different Servers(both with ISA), and everything seems to work OK. Well it works OK when I use PPTP as the Authentication protocol. If I try to use IPSEC it fails to Authenticate. I've read somewhere in Tom's book about an IPSEC driver that needs to be installed, but I've also seen that you can't do IPSEC if you are doing NAT, which ISA does right? So what is the answer here. Thanks in advance, Nick. ____________________ Nicholas Palmer KCI Computing, Inc. (nick@xxxxxxxxxxx)