If I read your response correctly, you have a problem with the router and one with Anveo. Well, for the router, if the firewall is creating a problem, you can fix the IP address of the Obi and setup a port forwarding rule with the firewall. Make sure the IP address you pick is outside the DHCP range of the router.
You shouldn't need to do this but you effectively bypass the router's protections which is not needed for the Obi.