Thank you for your repy. Sorry to bother you again. Right now i'm working on VPN connection. Firewall Specification: W3k with ISA2004 Install, Firewall is a member server of Domain Controller. I have configured ISA2004 VPN Server but didnt able to make a connection from external network. (Note:- Refer to your docs "ISA2004 config guide") Erro on external client machine is " Error: 718 -Connection was terminated because remote computer didnot respond in timely manner". I have also created group for VPN client on my domain controller which has got WINS,DHCP,IAS installed & Configured (Note:- Refer to your docs "ISA2004 config guide"). The only thing i wonder is "control access through Remote Access Policy" option in Dail-in tab on my VPN roaming user's is not highlighted. How can i select this option to give permission for VPN client to dail-in. Any suggestion will be highly appreciated. Thank you in advance. With REgards, Jaweed.