VPN site to Site on the same subnet of addresses LAN - cannot communicate

Hello

I have the VPN tunnel between Site A and B which are both on the same local network.

Site A has a lan from 192.168.0.0/24 Interior and a demilitarized zone of 10.0.0.0/24

Site B has a lan from 192.168.0.0/24 Interior

I have the Setup vpn to communcaite the Site A DMZ with Site B on the inside.

The two tunnels are in place but I can't ping the other view and vice versa. Also in the DMZ when I ping the 192.168.0.0/24 range timesout ping, I guess that's because the ping is sent inside the line of A site. Also the DMZ is a secuity level 50 and inside the site lan security level 0.

Is it possible to make this work?

Thank you

John,

This could be a solution.

If they NAT their network to their Outside IP address this work, but a little bit different from a regular tunnel.

If they NAT their 192.168.0.0/24 entiner network IP address outside the box of Juniper, then get implemented and they will be able to send traffic and access to your network without problem. However, you will be able to send traffic (start) on their side, because their internal network behind the external IP address. If such translation is called PAT.

If you need full two-way communication through the tunnel you should ask them to translate their network in a one to one translation database so that they can get to you and you can view.

The other solution is to translate their network into your ASA. You can do the following:

192.168.200.0 static (outdoors, DMZ) 192.168.0.0 netmask 255.255.255.0

With these lines in place, the configuration of the tunnel will remain the same, no change is required. But when you need to access their network you must point the traffic to the 192.168.200.0/24, not the original 192.168.0.0/24 address.

So, in case you need to access their 192.168.0.10 your DMZ host, you should actually try to access the 192.168.200.10.

Why don't you give it a shot and let me know the results?

Tags: Cisco Security

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