Static Routing

Question

Trying to connect another network to Sophos UTM. 
 
 Sophos UTM is running DHCP Server 192.168.1.100 giving IP from 192.168.1.101 - 192.168.1.254. 
 I have a router that's connected to Sophos UTM with IP of 192.168.1.142 that's running its own DHCP server of 192.168.2.1. 
 Clients in the router's network can connect to clients in Sophos UTM, however, clients in Sophos UTM network can't connect to clients in the router's network. 
 After searching through the forum, I have a static route configured as follow, Gateway Route -> Network (192.168.2.0/24) -> Gateway(192.168.1.142). But its still not working, am I missing something? 
 
 Firewall setting is as follows, Internal -> any -> any 
 NAT Masquerading setting is as follows, Internal -> Uplink Interfaces. 
 No NAT rule.

apijnappels · Answer

Then it's most likely something in the other router that prevents "outside" traffic to enter inside. 
 If this is just an ordinary router most people use at home then it is by design that it is natting inside traffic to the outside, so it will most likely NAT 192.168.2.0/24 to 192.168.1.0/24 and by default it will block all outside (192.168.1.0) traffic. 
 Maybe you can set this router up to really route between the 2 subnet's otherwise you'll need to create either a DMZ-host, Port-forwarding or other NAT rules inside this router to allow the traffic from 192.168.1.0 to 192.168.2.0.

BAlfson · Answer

The standard way to use a wireless router if it can't be put into bridge mode or masquerading disabled is to turn it into a wireless switch. Disable DHCP in the Sagemcom, tape the WAN port over and plug the connection with the UTM into one of the LAN ports. Now, no routing will be necessary. 
 Cheers - Bob