HDHomeRun Dual firewall issue

Hello,

I have a HdHomeRun Dual, and am having firewall issues between it and Fedora 18. When I run hdhomerun_config discover with iptables enabled with it's default settings from a fresh F18 installation, it says no device found. but if I restart iptables, which clears everything and sets everything to open hdhomerun_config discover is able to find the HdHomeRun Dual with no problem. How do I allow access to the HdHomeRun Dual using iptables?

Thank you