Date: Thu, 27 Feb 1997 06:04:34 -0800 From: David Greenman <dg@root.com> To: Christoph Kukulies <kuku@gilberto.physik.RWTH-Aachen.DE> Cc: dwhite@resnet.uoregon.edu, kmitch@weenix.guru.org, questions@freebsd.org Subject: Re: forwarding broadcast packets between interfaces Message-ID: <199702271404.GAA04752@root.com> In-Reply-To: Your message of "Thu, 27 Feb 1997 10:23:44 %2B0100." <199702270923.KAA17835@gil.physik.rwth-aachen.de>
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>> On Wed, 26 Feb 1997, Keith Mitchell wrote: >> >> > Is there any way to forward broadcast packets between interfaces?? >> > >> > I would like to be able to browse the windows machines on the other side >> > of the gateway with a windows machine behind the gateway. The problem is >> > the windows machine doesn't get the broadcasts so it doesn't know they are >> > there. Otherwise, it can connect to them fine. It is using Netbios over >> > TCPIP (NetBT). >> > >> > Also, it would be nice if I could echo the rwho packets to the local subnet >> > as well. >> >> Perhaps; try setting gateway=YES in /etd/sysconfig then add the proper >> routes. > >No, this won't work. broadcasts are UDP packets which are not routed by >a gateway (normally). There may be a way to tell the kernel (with an option) >to do UDP routing. I remember that Garrett (or David Greenman) once gave me >that tip. Broadcasts have nothing to do with UDP packets other than a UDP packet, like any other IP packet, may or may not be sent to a broadcast address. It is true that packets sent to the broadcast address are not routed through the gateway, and aside from creative mis-configuration, there isn't any way you can get the gateway to pass them through, either. -DG David Greenman Core-team/Principal Architect, The FreeBSD Project
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