Concentrator 3005 ports for router

Unanswered Question
Sep 18th, 2007

Hello to ALL,

Something got screwed up here. I need to know which ports should be open on a router that is in front of the concentrator ? ? ?

UDP 4500

TCP 10000

Are these right ?

Please help, thank you

I have this problem too.
0 votes
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
Loading.
fembsen Thu, 09/20/2007 - 02:27

Hi,

IPSec uses the ESP IP protocol (not port) and UDP port 500 (isakmp) and might use the AH IP protocol.

If you use Nat-T then you need UDP port 500 (isakmp) and UDP port 4500 (originally UDP port 10000). With Nat-T there is no need for the ESP and AH protocols.

Regards, Frank

Actions

This Discussion