Recently I noticed an issue with my FiOS router no longer allowing my DLNA Clients to connect to my PS3 and MiniDLNA Server when connecting over wireless. My wired clients were unaffected by this issue.

Firmware Version: 20.19.8
Model Name: MI424WR-GEN2
Hardware Version: E

After some tinkering I discovered that IGMP Proxy settings was causing my problem. Armed with this knowledge I disabled it by doing the following: Login to the router, Advanced -> Yes -> IPMG Proxy – Set IGMP Proxy (Enable/Disable): to Disable and save

Problem Solved!