Asa VPN transport Mode

Unanswered Question
sushilmenon Tue, 12/11/2007 - 07:05

hi first of all vpn is not supported on asa in tranparent mode.

unless it is configured for managing the box

or the vpn traffic is terminating on a another device behind the asa where it can pass-through the ipsec traffic.

but u cannot terminate ipsec vpn on the asa in tranparent mode for protecting traffic.



ggilbert Tue, 12/11/2007 - 07:16


Can you please explain further as to what you mean by VPN in transport mode.

ASA does support L2TP which should be configured for transport mode on the transform set. Is this what you want to know?



Well, this is the scenario i have.


We have a gre tunnel between both routers, but in the middle of them we have tha ASA running 7.2(3) version making a L2L in transport mode.

Un router is connected behind inside interface of the ASA and the other router is on Internet.

If we configured all in tunnel mode, the vpn is established, but at one of the sides the packets are not decrypted.

If we configured


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