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Sophos UTM-to-UTM RED Tunnel Not Passing Traffic Through Firewall

Hi all.

A slightly odd one here. 

I have two offices, each with a Sophos UTM. The Server UTM (192.168.1.251) is the gateway, DHCP, DNS etc for its office. The Client UTM (192.168.2.251) is not doing any of the DHCP, DNS etc for its office, this is being done by another router at present, 192.168.2.254. 

I have connected the two Sophos UTMs with a RED tunnel (the virtual interface IPs are 192.168.100.1 for the server and 100.2 for the client) using this standard guide (https://www.sophos.com/support/knowledgebase/120157.aspx). The tunnel is up and running and I can access the web interface of one UTM from a computer in the other office, as well as ping it. 

However, I cannot access or ping any of the other devices (such as the web interface of the remote office router) in the remote office via the client UTM. Traceroute etc from the server UTM shows me the packets going into the virtual interface of the client UTM and not going any further. Firewall logs show me the data coming from my terminal in the Server office and passing through the firewall in the Client office, but I don't see any data coming back the other way, despite having set the firewalls in both offices to basically allow all traffic via those networks. 

Any ideas / anyone keen to remote in and sort this out for me, let me know your rates.



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  • Hi, Martin, and welcome to the UTM Community!

    If you are not seeing any dropped packets in the firewall log, this must be a routing problem.  Please click on 'Use rich formatting' and insert pictures of your static routes, stating in which UTM each is.

    Cheers - Bob

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