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IPSec tunnel - trafic not going through

I have UTM with private addresses on both interfaces. There is a router in front of the UTM. I have setup IPSec vpn tunnel between UTM (my side A) and another device about 10 days ago. It has been working until two days ago when traffic stopped going throug tunnel. The tunnel on UTM is green (operational), but traffic can't pass through tunnel anymore. I tried tracert from my internal network, it reaches UTM internal interfaces and no information after that. The same with tracert from UTM. 
In order to test IPsec , I setup ipsec tunnel between my utm A and UTM B. It won't establish until I setup VPN ID optional (I inserted ip address (private) of external interface of my UTM A. After that the tunnel established properly, and every traffic can pass through tunnel. So the tunnel with UTM is working properly. 
I checked routes and see there is a route for second tunnel (which is operational and working) that goes through ipsec tunnel.
But I can't see any route related to first tunnel (I have problem with)....

Has anyone some idea about that?


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Parents
  • Please provide a simple diagram that shows representative IPs.

    Cheers - Bob
     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
Reply
  • Please provide a simple diagram that shows representative IPs.

    Cheers - Bob
     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
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