Bridge not forwarding multicast traffic to the tap interface

Guus Sliepen guus at
Fri May 13 19:24:35 CEST 2016

On Sat, May 14, 2016 at 12:06:51AM +0800, Terry T wrote:

> I have a Debian 8 64-bit machine set up as a server and apt-got the tinc
> package. I configured tinc as a bridge and everything seems normal except
> that the tunnel does not forward multicast traffic.

Did you enable forwarding (echo 1 >/proc/sys/net/ipv4/ip_forward) and
allow forwarding in your iptables rules?

Met vriendelijke groet / with kind regards,
     Guus Sliepen <guus at>
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