Thanks Steffan, I will refer the document. Very helpful. Regards, Raj Periyasamy Systems Administrator MCSE(Messaging), CCNA -----Original Message----- From: Stefaan Pouseele [mailto:stefaan.pouseele@xxxxxxx] Sent: Thursday, April 28, 2005 11:46 AM To: [ISAserver.org Discussion List] Subject: [isalist] RE: Nortel VPN clients behind ISA 2000 http://www.ISAserver.org Hi Raj, Check out http://www.isaserver.org/articles/IPSec_Passthrough.html. HTH, Stefaan -----Original Message----- From: Periyasamy, Raj [mailto:Raj.Periyasamy@xxxxxxxxxxxx] Sent: donderdag 28 april 2005 17:36 To: [ISAserver.org Discussion List] Subject: [isalist] Nortel VPN clients behind ISA 2000 http://www.ISAserver.org Hi List, Has any one successfully got to work Nortel VPN clients behind an ISA 2000 server? Is there any known problems. I have some third party visitors who need access to their VPN servers through our ISA server. I have enabled them as SecureNAT clients, and enabled IP 50 (ESP), UDP 500, and UDP 42000 as requested by them. Our ISA server is behind another corporate Checkpoint firewall. I can see the first request passes through ISA on UDP 500, and reaches the Checkpoint firewall. The second request passes through the ISA on UDP 500 and gets dropped in Checkpoint firewall. Is it possible to get it working with this configuration ? Thanks a lot. Regards, Raj Periyasamy Systems Administrator MCSE(Messaging), CCNA ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=isalist ISA Server Newsletter: http://www.isaserver.org/pages/newsletter.asp ISA Server FAQ: http://www.isaserver.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Other Internet Software Marketing Sites: World of Windows Networking: http://www.windowsnetworking.com Leading Network Software Directory: http://www.serverfiles.com No.1 Exchange Server Resource Site: http://www.msexchange.org Windows Security Resource Site: http://www.windowsecurity.com/ Network Security Library: http://www.secinf.net/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ You are currently subscribed to this ISAserver.org Discussion List as: stefaan.pouseele@xxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=isalist Report abuse to listadmin@xxxxxxxxxxxxx ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=isalist ISA Server Newsletter: http://www.isaserver.org/pages/newsletter.asp ISA Server FAQ: http://www.isaserver.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Other Internet Software Marketing Sites: World of Windows Networking: http://www.windowsnetworking.com Leading Network Software Directory: http://www.serverfiles.com No.1 Exchange Server Resource Site: http://www.msexchange.org Windows Security Resource Site: http://www.windowsecurity.com/ Network Security Library: http://www.secinf.net/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ You are currently subscribed to this ISAserver.org Discussion List as: raj.periyasamy@xxxxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=isalist Report abuse to listadmin@xxxxxxxxxxxxx