On Sat, 2003-07-05 at 16:10, Trevor Talbot wrote: > On Saturday, Jul 5, 2003, at 06:45 US/Pacific, Jason Dixon wrote: > > > Unfortunately, traffic destined for the broadcast address > > (192.168.0.255) is not being translated on $int_if and passed on. It > > simply disappears. I've dumped the traffic on enc0, $int_if, and the > > target server on the wired segment to confirm this. I've tried to NAT > > and filter on enc0, but I'm not seeing any improvement. I'm mildly > > The kernel won't forward broadcast packets. I encountered this a > few months ago in the "L2 broadcast and NAT state" thread. In my > case, ethernet broadcast was the concern, so I modified > sys/net/if_ethersubr.c ether_input() to drop the broadcast flag > before passing it up to IP: > > case ETHERTYPE_IP: > m->m_flags &= ~M_BCAST; > schednetisr(NETISR_IP); > > That just takes care of ethernet; what pf translates the dest IP > to (if anything) will determine if it gets remarked as a broadcast > at IP level.
Thank you Trevor, that makes sense. I'd also like to thank Mathieu for reminding me that I should be using WINS support for Samba, rather than trying to route broadcast. His reply, for the archives... -----Forwarded Message----- From: Mathieu Sauve-Frankel To: Jason Dixon Subject: Re: Sending broadcast traffic (continued) Date: 06 Jul 2003 08:06:17 -0400 You cannot route broadcast packets. You should strongly consider the use of a WINS server for all NetBIOS setups that involve routed or multi-subnet environments. Samba also has the functionality to act as WINS server/WINS forwarder.
