Improve company productivity with a Business Account.Sign Up

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 807
  • Last Modified:

IPSec Tunnel Tru. ISA or Microsoft Forefront Threat Management Gateway

I have ISA2006 server installed on my office network and all the pc on the network are  using SNAT. some of the users on the network  have nortel vpn client to connect to corporate head office. Through ISA2006/TMG SNAT nortel vpn client fails to establish a tunnel.
The policy for ISA is set to allow all traffice from inside(internal network) to external and no other restriction is added in the policy.
nortel client version is v04_87
0
Manojc3
Asked:
Manojc3
  • 2
1 Solution
 
pwindellCommented:
It is failing due to NAT-T  (NAT Traversal)

IPSec is not capable of running over NAT.  If the Nortel Client was using PPTP it would be working fine.  To overcome the IPSec's failure of NAT requires NAT Traversal.  

Make sure the Nortel Client is configured to use NAT-T

These links may help:
http://www.isaserver.org/articles/IPSec_Passthrough.html
http://forums.isaserver.org/m_2002012471/tm.htm
0
 
Manojc3Author Commented:
Yes I downloaded the new notel vpn client 6.0 which has NATT support. It working now. Thank you.
0
 
pwindellCommented:
Very good.  Glad it worked out for you.
 
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

Get expert help—faster!

Need expert help—fast? Use the Help Bell for personalized assistance getting answers to your important questions.

  • 2
Tackle projects and never again get stuck behind a technical roadblock.
Join Now