Multicast traffic

[dcol]

What is generally the best practice for IGMP Multicast traffic. Allow or block on the internal networks?
I do see occasional hits from a WiFi router, which are now blocked with a default deny rule.

[dcol]

Bump, anyone.....

[elektroinside]

Allow on the local net It's actually a tool to improve network traffic in some cases.

[dcol]

That's what I thought. I will create a floating rule including all my internal interfaces, but not to WAN, to allow IGMP.
Thanks

[elektroinside]

You're welcome. Go ahead, although, just as a side note, in very secured setups, all (except the very minimum) TCP/IP processed stuff are disabled, including IGMP. And also worth mentioning that older OSs are vulnerable (regarding IGMP) but patches are available

[mimugmail]

It only works in the local LAN if you don't use multicast routing (which is currently unsupported), so you can either create a rule for allowing or a rule for dropping with logging disabled.