How to configure VPN remote access to use a specific Interface and the road
I add a second external connection to an existing system on a 5510 ASA ASA V8.2 with 6.4 AMPS
I added the new WAN using another interface (newwan).
The intention is to bring more internet traffic on the new road/interface (newwan), but keep our existing VPN using the old interface (outside).
I used the ASDM GUI to make changes and most of it works.
That is to say. The default route goes via (newwan)
Coming out of a VPN using a site to character the way previous (out) as they now have static routes to achieve this.
The only problem is that remote incomming VPN access Anyconnect do not work.
I put the default static route to use the new interface (newwan) and the default tunnel road be (outside), but that's the point is will not...
I can either ping external IP address from an external location.
It seems that the external interface doesn't send traffic to the - external interface (or at least that's where I think the problem lies). How can I force responses to remote VPN entering IPS unknown traffic to go back on the external interface?
The only change I have to do to make it work again on the external interface is to make the default static route to use external interface. Calling all internet traffic to the (external connection) original
Pointers appreciated.
William
William,
As it is right now that you will not use the same interface you have road to terminate remote access unless you know their IP addresses by default.
In one of the designs that I saw that we did something like that.
(ISP cloud) - edge router - ASA.
The edge router, you can make PAT within the interface for incoming traffic on port udp/500 and UDP/4500 (you may need to add exceptions to your L2L static) of the router. It's dirty, I would not say, it is recommended, but apparently it worked.
On routers, this kind of situation is easily solved using VRF-lite with crypto.
M.
Tags: Cisco Security
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