Hi All, Thank you for your suggestions, I have been trying to get to the bottom of this for the last couple of days without success. The problem is that the ISA server is just a member server and is not running DNS or any other networking services such as DHCP, it is used purely as a VPN server, firewall and web proxy. This problem has only come about in the last week or so, before that it was working fine. I have no problems connecting to the server on the static internal IP address even though the VPN clients get an address in the same range, the server is also used in a router-to-router VPN server configuration which gets its IP address from the DHCP server. The issue that has got me really stumped because it has been working fine with the current configuration for the last year or so, I have actually restored an old configuration file but still no joy. Kind Regards ------------------------------------------------------ Darren Humennyj IT Systems Manager Esprit Soutron Partnership Limited Charlotte House, Wyvern Business Park, Derby, DE21 6BF darren.humennyj@xxxxxxxxxxxxxxxxx www.espritsoutron.com tel: +44 (0)1332 821 800 fax: +44 (0)1332 821 801 Registered in England. No. 2312520