On Fri, 7 Aug 2020 15:25:25 +0200 Abelenda Diego <diego.abele...@gmail.com> wrote:
> Hello, > > I have discovered that I had a multicast issue for years I did not > know about. I use a FreeBSD (opnsense) setup as router for my home > network and have igmpproxy for IPTV. Somehow everything seems to > work, until I realized that my ISP was making a DoS with multicast. > It is pretty much what was described years ago here: > https://forum.netgate.com/topic/62591/igmp-issues-causing-isp-to-perform-multicast-dos-on-my-pfsense/7. > But the solution of not using FreeBSD seem weird. So dug a lot > learning about Multicast IGMPv{2,3} etc in the process. Here is an > abstract of what I found: > > > igmpproxy is performing "correctly" in that it will act upon to > IGMPv2 Join request from the TV box by joining the multicast groups > correctly. When the TV Box sends an IGMPv2 Leave request, igmpproxy > will remove the source IP from the multicast table on the interface > (the code is here > https://github.com/pali/igmpproxy/blob/b7940fc75b36d5bcc3a07654fc1af76f179302a9/src/mcgroup.c#L58-L60 > this same call is used for joining and leaving). > You can drop all this and just forward (bridge) all multicast: http://netlab.dhis.org/wiki/ru:software:freebsd:igmpproxy_on_netgraph https://lists.freebsd.org/pipermail/freebsd-net/2011-December/030643.html _______________________________________________ freebsd-net@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
