Allow access to router when guest network isolation is enabled?

[dawt]

I have a script running on the router that's listening to a specific port (eg. 8080). Is there a way to allow access to it from a guest network while maintaining intranet isolation? In other words, if I'm connected to a guest network, I don't want to be able to connect to any other computers on my network, but I want to be able to connect to the router. So far I've tried using guest network 1 and connecting via 192.168.101.1, and guest network 2 and connecting via 10.0.0.1, but neither of them work.