From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Kaplowitz, David" Subject: multicast forwarding Date: Mon, 1 Dec 2008 14:44:19 -0500 Message-ID: <1228160659.8392.94.camel@irbt-1279> Reply-To: "Kaplowitz, David" Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-2lUvH8OwEVFagL3ti8/C" To: Return-path: Received: from smtp1.irobot.com ([206.83.81.187]:17200 "EHLO smtp1.irobot.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752269AbYLAT7G (ORCPT ); Mon, 1 Dec 2008 14:59:06 -0500 Content-class: urn:content-classes:message Sender: netfilter-devel-owner@vger.kernel.org List-ID: --=-2lUvH8OwEVFagL3ti8/C Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Greetings, I have an interesting difficulty. I want to be able to grab a multicast stream from a machine (192.168.12.13) and forward/rebroadcast/rewrite it, such that the packets seem to come from my DMZ host (192.168.12.12). I have been trying an iptables solution, but that doesn't seem to be working at the moment, and it was recommended to me by =EF=BB=BFj_engelh on= the #iptables channel to ask at this address for further assistance. Thank you for your time and effort on my behalf. -dkap Below is three representative packets: U 192.168.12.13:6970 -> 224.0.1.20:6990 ...@.7..........U`c.|?...^v/9.....?.....E......{.......^../..W....o.Q..;.= .. ....:'.S.~.....fv.......1xe................y...|Q.....3.@.u..........=3D.= .... .^0.........0.B.`.^............{../.....B..UY....Z.....Te....H........^..= .. .'...._..<.!..^b/7.....b..3.s.."....X......B.NL&...*.V..C.../|^o.T@......= O. =3D.7..Nc...R....Vku...X8.`8A$.....]..Qy8......[...)3x./.?.n.......qy. = =20 # U 192.168.12.13:6970 -> 224.0.1.20:6990 ...A.7..........U.S.}..../;......b..........fN.........O.^0.cA..t...b._W.= .. ./.:/......D..X^5.1....^.y'./.$.Z....-*..r.`.<^I...x...+.......-SVa.....N= .. ...;.]...=3D.......lJ..mO.......J.CfZ..1..p= *. 88Z.f.....@ ./'........:.c..0..:E.aO...B.h.....P.....r........T....%..K..= .. @J~...{...`q.q.g9J..PK....4-..kM.b..|..{....._.. GT..|........1y4^.......= .. ./.... = =20 # U 192.168.12.13:6970 -> 224.0.1.20:6990 .`.B.7.u....... ....$. ...h.H...X ........`.....4Z.z....v..Gw...~..|.....= .. T...hc...Q..knj7Y.`....|6%..LpS...wt.....s.|{i.}.....y.P5....(..q.e;.Z.H.= .. 8O..nH.iw...t..I.....<.....&......y6..,b...Tk..k^.Z._.S./.Ny..C}.9cu..0..= .q O.........R.z:.u..-L..}.rPV.6.x.P....O.....?.....?..NO..?'..\...V.:....lp= .! ..W..iar...B.aD.....^.....B.!..KXK...f....u....^:VEa|g.O...apq........~..= %. ...%....d......y....P.Tz.....-..|.3...U@u.@Z...Z...7...y....= .. ..$.$\......e.@.$*.h.{'......EE|.2z.+z.5....x....ul..@.4.$G.....r..N..q.= uD 1..W...I....,^....5.`......z.o.......3.V...r...QEf...v...!..x.x..<4.?.e.1= .] S..IJ...0 ......P.......x..i-....* .a8.A7........R..l2U.......e4t.g......= .p ..aw....e......H.c.....h*...d.}....aK..........P...(...De..V...c.....PF..= .8 ......@y..2'....\..G..~x.F^/fl.0...TY...g.<..)L9.MR...d.S8.QF.%...z.....0= .^ ...........5...............GlYT.^#c.L.._Ur..\\..;r%^.*.M@..5H.T.o.s...2..= T. .g...?..b......?FwR.M....s...NN..h..&~.....".<.F.&.uN..=3D..........pb4U.= .... p..5......&.4.L.p-.C.oB..C...%^].e.`..#......6..z.2......2...<.h0a....E")= .. .v.@.@M..t......0DS.L0.=3DO.}M6$Mf..."....1j..-.#Yi....a.3#...i.>.....}^.= W... .)C.JL...... .q...F....ss..S...1.)L!.C.fh\...V. =20 --=-2lUvH8OwEVFagL3ti8/C Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQBJND6TueMqKH4VzoYRAurxAJ9ANFgUUx1FeVaVxsgSkPs/3xGfNwCgsDgU BD8xs+qkMhLXMtAKbdZeDss= =eO4R -----END PGP SIGNATURE----- --=-2lUvH8OwEVFagL3ti8/C--