How annoying. I've discovered Endian Firewall and have a spare PC so setup it up to act as one. Set it up for testing. Firewall connected to my switch and the other NIC connected to the router. My PC was connected to the switch.
So firewall (in the RED zone) 1st NIC connected to the router with 10.0.0.2 and the router 10.0.0.1
The other NIC on the firewall is 10.0.1.1 (in the GREEN zone) and connected to the switch.
Once the firewall was booted and connected, my PC could connect to the Internet. Disable the firewall and sure enough can't get to the Internet.
Was able to get on the firewall console via a browser going to
https://10.0.1.1 as my PC is 10.0.1.2 (in the GREEN zone)
So decided to migrate it out of test and into my network. Now I can't get access to the console at all. Moved it back to my test area and can't get access to the console there now either. Reset to factory settings which sets it to 10.0.0.13 and I've set my PC back to 10.0.0.2 and I can get on the console and set everything up again. Once back to 10.0.1.1 and my PC back to 10.0.1.2 yet again I can't access the console.
I'm confused as it worked fine before.
Pic shows setup