Vishal Vasu's Tech Talk » CISCO VPN http://www.vishalvasu.com Opening Doors to Windows Technology Wed, 02 Jun 2010 12:49:32 +0000 http://wordpress.org/?v=2.9.2 en hourly 1 Allowing CISCO VPN Client Traffic in ISA Server http://www.vishalvasu.com/allowing-cisco-vpn-client-traffic-in-isa-server/ http://www.vishalvasu.com/allowing-cisco-vpn-client-traffic-in-isa-server/#comments Fri, 01 May 2009 15:33:57 +0000 Vishal Vasu http://www.vishalvasu.com/?p=166 I thought that this might be easy since all that may be required would be allow the IPSec and IKE Client traffic through a rule in ISA. But no it did not work.

To allow a CISCO client via IPSec/UDP to connect through an ISA 2006 firewall, I had to create custom protocol as under:

Port Number: 500
Protocol Type: UDP
Direction: Send Receive

Port Number: 4500
Protocol Type: UDP
Direction: Send Receive

Port Number: 10000
Protocol Type: UDP
Direction: Send Recieve

I added all the ports in one custom protocol defination without Secondary Connections and then added an Access Rule to allow traffic from Internal to External for the above created custom protocol. Problem solved and the connections were now possible.

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