@nicktibb,

My recommendation would be to look into how to setup up a VLAN for your other network devices using an Ethernet Switch, I believe this would effectively let you operate two separate networks on the same IP from your ISP; one routing through a VPN, and the other using the default DNS and connection settings. I will look more into this, and see if I can find alternatives for your configuration.

  @nicktibb,

I am sure that there are some routers out there that can establish a VLAN, however, the easiest, most cost-effective way to configure this is to purchase a MANAGED ethernet switch that offers VLAN functionality. We offer a few models in our store that do this by designating the last four ethernet ports as a 'separate' network