Media Server not visible on network

I have a NAS with built in Media Server and one fine day my media server (Twonky) just disappeared from my network. My TV/IPad/Google TV/Apple TV won't find it any longer.

I was able to access my media server through a web browser with the proper port, so I knew it was my router that's preventing it from being discovered.

After 4 months, I figured out the issue. " IGMP Proxy" was enabled on my Verizon Fios Router ( I guess by auto firmware update). Once Disabled, my Twonky Media Server appeared on all devices.

To disable IGMP Proxy, go to your router home page ( usually by typing the default IP Address 192.168.1.1)

1. Click on Advanced Tab/Button
2. Locate IGMP Proxy, 
3. Disable it.