You still didn't answer. You said you have two interfaces on the same subnet and concluded that the kernel nagged about it.
My question was what exactly you want to do. As you might know, the multicast client issues an igmp join (usually received by the first multicast router) and after that it can receive the multicast packets if the rest of the multicast has been set up properly. AFAIK, the concept 'NAT' cannot be applied to this kind of communication. If your linux box is being considered as an mrouter then on one side it would receive that igmp and on the other side it would forward that multicast session and of course the multicast routing information to your upstream mrouter. But beside all these, you said that kernel says something... again, what is the exact setup and what do you want to do? If your concern is only forwarding that multicast session, then you have to ACCEPT that in one of your FORWARD rules... Do you know which multicast address is being used? Ramin On Sat, Apr 06, 2002 at 08:15:00PM +0200, Fabio Vendramin. wrote: > I want to enable the client of the protected interface to use multicast > with the other network (like streaming). > > The firewall doen not use NAT. > > Thx. > > Il sab, 2002-04-06 alle 19:50, Ramin Alidousti ha scritto: > > What exactly do you want to do, and on which of these two interfaces? > > > > Ramin > > > > On Sat, Apr 06, 2002 at 07:03:56PM +0200, Fabio Vendramin. wrote: > > > > > Hi to all! > > > I have a firewall with Debian GNU/LINUX and kernel 2.4.18 with iptables > > > 1.2.5 > > > > > > The firewall have 2 ethetnet devices with 2 static ip address in the > > > same network (example. 157.154.0.1 & 157.154.0.100) and use proxy arp. > > > > > > Attached with one device there is a cisco router that support MULTICAST > > > protocol. > > > > > > In the kernel I have enabled all option to support multicast but i have > > > no results. > > > > > > All the multicast traffic stops when arrive at the firewall on both the > > > side of the device. > > > > > > I have tried to install mrouted but when I start it, tell me that there > > > is a problem because both the etharnet device is in the same network. > > > > > > I have configured iptables to enable all the traffic in all the chains. > > > > > > I have read all the howto but nothing. > > > Any idea? > > > > > > > > > Thanks. > > > > > > > > > > > > > > > > > > > > >
