Dan, We had this issue quite some time ago and one of our guys found a setup that worked. I don't know if it still holds water but it was so difficult to track down we ended up keeping it for future reference. Below is a nutshell of what we've got to work without the FWC installed on our "visitors" computers. The setup below applies to our ISA2000SE so I apologize if it doesn't fit into your 2004 configuration. We have to wait until after April 15 to jerk around with our network (unless something breaks - crossing fingers). If you've got other questions about my settings then just ask and I'll do my best to pass it along. [nd] Protocol Definitions -> Def. Name: IPSec NAT-T Port Number: 4500 Port Type: UDP Direction: Receive Send Def. Name: IPSec IKE Port Number: 500 Port Type: UDP Direction: Send Receive Protocol Rule -> Allowed for the two definitions listed above IP Packet Filters -> Filter Name: ICMP Type 3, Code 4 Filter Type: Custom Filter IP Protocol: ICMP Direction: Both Type: Fixed Type Number: 3 Code: Fixed Code Number: 4 Filter Name: Protocol 50 Filter Type: Custom Filter IP Protocol: Custom Protocol Protocol Number: 50 Direction: Both > Nick Clark, MCSE Kerber, Eck & Braeckel LLP 1000 Myers Building Springfield, IL 62701 Tel: 217-789-0960 x289 Mobile: 217-971-7005 Fax: 217-789-2822 http://www.kebcpa.com-----Original Message----- > From: Ball, Dan [mailto:DBall@xxxxxxxxxxx] > Sent: Tuesday, January 10, 2006 2:26 PM > To: [ISAserver.org Discussion List] > Subject: [isalist] Nortel VPN Client > > http://www.ISAserver.org > > I tried this afternoon to get a computer working on our network that > needs to use the Nortel VPN Client. No success... > > Looks like I'll need to define the protocols in ISA for that client. > I've tried searching Nortel.com, isaserver.org, and Microsoft's > website for a port/protocol listing, but I can't even find the version > of the client they're using! Does anyone know what ports the VPN > client uses? > > Client: Nortel Contivity VPN Client v06_01.014 > OS: Windows XP SP2 > ISA: 2004SE