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Cisco VPN client through the ISA server - 28.Oct.2002 7:39:00 PM

zubin

Posts: 3
Joined: 25.Jul.2001
Status: offline

Is there a Tutorial for configuring Cisco VPN client through the ISA server? What ports do I need to open on the ISA server and where do ip open them?

Thanks in advanced.

-Zubin

Post #: 1

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RE: Cisco VPN client through the ISA server - 28.Oct.2002 9:43:00 PM

spouseele

Posts: 12782
Joined: 1.Jun.2001
From: Belgium
Status: offline

Hi Zubin,

Have you already read the post http://forums.isaserver.org/ultimatebb.cgi?ubb=get_topic;f=13;t=001043 and done a search in the forums on the keyword Cisco?

As you can read in the above post, you usual need to enable two protocols in order to pass IPSec through ISA, unless the IPSec implementation already supports the very latest drafts with the NAT auto detection feature. In the latter case only the predefined IKE protocol definition (UDP port 500 send/receive) is needed. So, the first thing you should do is find out which ports must be opened besides the standaard IKE UDP port 500.

BTW --- the most Cisco implementations I heard of uses UDP port 10000 send/receive for the UDP encapsulated ESP packets.

HTH,
Stefaan

(in reply to zubin)