12-03-2008 02:40 PM - edited 03-11-2019 07:20 AM
I have the following setup:
private IP ((non-routable) IP on the outside Interface that goes into a Router with the public (routable) IP Address) <-> ASA <-> IP DMZ (internal Interface with routable IP)
What i want to achieve is to be able to establish vpn tunnels (road warrior, not site-to-site) to the inside Interface (routable IP) and not the outside interface (non-routable IP).
Is this even possible ?
let me elaborate a bit:
the idea is that the outside interface of the ASA has a private IP Address. This means that this address is not routable, so i cannot use it to connect the vpn clients to it. What i want to achieve is to be able to use the IP Address of the same ASA that resides on the DMZ Interface (which is a public/routable IP Address).
The problem is that even if i enable management-access on that interface, i have no idea if i would be able to connect to it. And since this is part of a larger ASA Production Setup, i cannot really play around with the IP Addresses (the simple way would be to subnet my dmz further and assign a small subnet on the outside interface of the asa to the border routers).
Anyway, anybody, please let me know if i can terminate vpn tunnels on the inside interface of an ASA.
12-05-2008 07:59 AM
You will still have to connect to a public routeable IP address. You can do what you want to do - you just enable the ISAKMP/IPSEC termination on the DMZ interface. You will have to have a static NAT entry to allow this to happen - as I do not think you can perform PAT for IPSEC.
HTH>
01-12-2009 06:13 PM
Hi Andrew:
I'm trying to do the same thing as the original poster. My OUTSIDE interface has an non-routable private IP address and the INSIDE interface has static public IP address.
I want to terminate my VPNs on the INSIDE interface, but that's not working with a fresh ASA configuration with everything enabled.
Regards,
Jorge
01-13-2009 01:40 AM
Jorge,
Sorry I am confused - your "outside" ip address is one of the:-
10/8
172.16/31
192.168/16
addresses ranges?
And the Inside has an Internet IP address?? Errrrmmmm I would personaly reverse it, have the internet address on the outside and the internal on the inside = the normal firewall setup and configuration.
HTH>
01-16-2009 08:54 AM
Hi Andrew:
Thank you for your comments. This is a special requirement, and as of now is working.
My question is if there is a special configuration required to accept VPNs in the INSIDE interface.
Regards,
Jorge
01-17-2009 01:07 AM
Jorge,
NO not really - the only config change that you need to make is:-
Instead of - crypto isakmp enable outside
you configure
crypto isakmp enable inside
This will allow VPN's to create/terminate on the inside interface.
HTH>
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