Hi Adman, Dlabun is right. Now we know more about your setup, it is indeed a private circuit and the UTM may not be necessary. That said, it sounds as though you want to change the topology of the network and break it further down into different subnets? If that is the case, I would place a UTM or router on the right hand side and then use a different subnet to break up the network/collision domain. This would then mean that all traffic after the UTM or router would be on an entirely different subnet and would need configuring as such. The appropriate routing would also have to entered on the Cisco on the left hand side also? Is this what you want? Both sides can still belong to the same domain in AD but they would be in totally different subnets? Please ignore my previous post about natting etc (unless you want the above) as I wasn't sure of your setup and it's becoming more clearer as we speak.
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