Sophos Home UTM Advice

You need at least two ethernet ports for UTM to utilize filtering and appropriate setup.  USB if I remember right, can be used since (I think) version 9.1, but it was a very short list of what actually worked, and be warned - it will be a major bottleneck for your speed.

It might be better if you just bought a new NIC with two ports that can fit in your Dell box, and a lot less hassle.  Intel-based NICs are good, stay away from Realtek.

Thanks for all your help im just gonna have to look into an alternative desktop supporting 2 network cards

If you want low power small boxes, try looking at Jetway products.  I used to run an Atom-based processor on a Jetway board years ago and it worked out really well until my upgrade to a 4-post rack mount system in my basement.

It is small and low power.  If your set up is just for you or two of you, it would work out well if your ISP speed is 'average'.  If you have a decent speed and need it for streaming, gaming, you will want something beefier to handle the IPS load and such anyways.

If you want low power small boxes, try looking at Jetway products.  I used to run an Atom-based processor on a Jetway board years ago and it worked out really well until my upgrade to a 4-post rack mount system in my basement.

It is small and low power.  If your set up is just for you or two of you, it would work out well if your ISP speed is 'average'.  If you have a decent speed and need it for streaming, gaming, you will want something beefier to handle the IPS load and such anyways.