Date: Mon, 10 Aug 2020 08:59:17 +0200 From: Abelenda Diego <diego.abelenda@gmail.com> To: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net> Cc: freebsd-net@freebsd.org Subject: Re: Multicast issue, interface not leaving Mutlicast Group Message-ID: <20200810085855.5b0efccc@debian> In-Reply-To: <BD1DD220-3A77-4187-9C19-33DB53DEFFEE@lists.zabbadoz.net> References: <20200807152525.711d4072@debian> <9c241a38-977b-dcdd-ba5d-e8b2dfa2b17c@selasky.org> <20200808143106.423bd20f@debian> <BD1DD220-3A77-4187-9C19-33DB53DEFFEE@lists.zabbadoz.net>
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--Sig_/5knc4BmNpJf+UFXHrhoZa== Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Sun, 09 Aug 2020 13:55:02 +0000 "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net> wrote: > On 8 Aug 2020, at 12:31, Abelenda Diego wrote: >=20 > > On Sat, 8 Aug 2020 12:54:37 +0200 > > Hans Petter Selasky <hps@selasky.org> wrote: > > =20 > >> On 2020-08-07 15:25, Abelenda Diego wrote: =20 > >>> Hello, > >>> > >>> I have discovered that I had a multicast issue for years I did not=20 > >>> know > >>> about. I use a FreeBSD (opnsense) setup as router for my home=20 > >>> network and > >>> have igmpproxy for IPTV. Somehow everything seems to work, until I=20 > >>> realized > >>> that my ISP was making a DoS with multicast. It is pretty much what=20 > >>> was > >>> described years ago here: > >>> https://forum.netgate.com/topic/62591/igmp-issues-causing-isp-to-perf= orm-multicast-dos-on-my-pfsense/7. > >>> But the solution of not using FreeBSD seem weird. So dug a lot=20 > >>> learning > >>> about Multicast IGMPv{2,3} etc in the process. Here is an abstract=20 > >>> of what > >>> I found: =20 > >> > >> Which version of FreeBSD is this (uname -a) ? > >> > >> There has been some fixes in the multicast area from time to time,=20 > >> and > >> you should make sure you've got all the fixes incorporated in the=20 > >> kernel > >> you are using, typically by testing a kernel based on a -stable or > >> -current branch of FreeBSD. > >> > >> --HPS > >> =20 > > > > Hello, > > > > This is opnsense, so it is not like I can change kernel as I want.=20 > > Moreover the > > kernel used by opnsense has some patches for stf 6rd support for=20 > > example, > > things like that. > > > > Anyway, the kernel I use is: > > > > FreeBSD $hostname 12.1-RELEASE-p7-HBSD FreeBSD 12.1-RELEASE-p7-HBSD #0= =20 > > 427d53bc125(stable/20.7)-dirty: Sun Jul 26 05:51:42 CEST 2020 =20 > > root@sensey64:/usr/obj/usr/src/amd64.amd64/sys/SMP amd64 > > > > But from what you are asking, it seems you suggest my issue is kernel=20 > > related > > and in no way a userspace problem. So I cannot do anything to mitigate= =20 > > the > > issue? > > > > BTW I said reset the interface fixed the issue, but in fact, I need to= =20 > > reboot, > > I found no way to clear the multicast group memberships. =20 >=20 >=20 > Is this related to: >=20 > https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D248512 and the there= =20 > referenced other bugs? >=20 >=20 > /bz Hello, Yes seems to be that, even the address already in use error is present in t= he log of imgpproxy. Thank you for pointing that. I will try to make opnsense include this patch quickly. Best regards, Diego Abelenda --Sig_/5knc4BmNpJf+UFXHrhoZa== Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEEhLBEGh6nN5+aat9KomT4UAfkGfgFAl8w8EUACgkQomT4UAfk GfgwqQ/6AukXl46vo61vSnsW886/sgYFElrs2vXipvPjHp/suL5kN0x0nHMOSu+y BQLljIt9LAb1Tpx2Ups9UDZL6jusjJehFIe6nLMmec+sCWtr5Ol5P/08EbWYX7B6 2tgcsFiGzSzJiFHyaOUd7l6JczGKJ1UKiNKkTlDkisFgFSRiDwc0hhqQnb+gknVd sY178WT8RYA75Jg+TGtmA/+cBFysRdEfN/jigFWh6hnyfSBzm7jhcqFSdoOMirVd i5WEWMbHLytU6XrJfEV0ac+ab3HnXHkY9FfXYMNEcXRFumuAF2T+XsdCt3M3oRb8 XcV15bccAnyMccUrOo0daTaZEyc+vBKPcKWdMCsx4/In6YnW5gDk9+g1d+y0XVDU MDabb1ctrPqQwMePPYrDRwu6Li0V/XFF+/9XY6FBMzW4KaPfkgDfnYZbOQyCB4xM IYf9L2kLY0RkAg9X0npvNtH+d9NzW7rHBAq49hixU4mtClGbEFFxSJ9Gp0fMNpxQ Ep71wBvU1hEfYWeo9gpeP7xh3p26B/hanE9Bggdb6D1NrmPh0ftRo+85V65YBSkC 1B/et9lvSH3fjNLW3WwXNolOmEB/L60j7mIkQv9b1mh8M0+vmCuqRtKWfhJbs5UU BYJEy6nDMHE+GJkSOsgvCprqCMaO0j66e9iDIjDDY8qXMPLcfq4= =3cQy -----END PGP SIGNATURE----- --Sig_/5knc4BmNpJf+UFXHrhoZa==--
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