I have blocked port 53 forward and redirect. On my ISP's router (which I am forced to use), you can't block port 53 on the gateway itself. I don't want to add

I have blocked port 53 forward and redirect. On my ISP's router (which I am forced to use), you can't block port 53 on the gateway itself. I don't want to add an extra router because that would add unnecessary latency. The above is not an unusual setup at all.