TV box saying no signal on channel when put behind firewall/router

maxandersen

I got a unifi Dream Machine (awesome router) and all devices now works through that and all is great EXCEPT the tv box.

It keeps saying there are no signal on the channels - it only starts working when I route it directly through the ADSL router - I assume there are some ports or other setup that needs opening up in the router or something.

Anyone know what they are?

JoelV

Hello @maxandersen

Thank you for your contribution. 🙂

I asked an expert, but unfortunately we can't help you out. Maybe @Tux0ne can?

Best regards
IvanH

maxandersen

Since I posted I figured out it is only the live TV that there are issues with - I can switch to "watch from beginning" and it streams just fine.

so i'm curious to know what "magic" the swisscom box does that isn't happening when traffic is sent via a router.

Tux0ne

The magic is called multicast. You need an igmp proxy:

https://community.swisscom.ch/t5/Router-Hardware/Swisscombox-Plus-nur-als-Modem-vor-Ubiquiti-USG-benutzen/td-p/493264

long story short (tl;dr)

The udm currently doesn't have an igmp proxy on board...

https://community.ui.com/questions/UDM-IGMP-Proxy/d16ab046-9556-4c17-8426-c32398621138

maxandersen

dammit;/

so no way around that? are there switches with igmp proxy on them or do i really need to add another router?

maxandersen

can swisscoms adsl boxes not do a direct pass through or would putting the router in DMZ be enough?

goemon

@maxandersen

you don't need another router, it's just a configuration you need to do on your dream machine.

maxandersen

but the dream machine doen't support the multicast proxy so i need to look for alternatives.

for now my alternative is to just use zattoo and which I might just stay with and save the 50 chf per month 🙂