I thought perhaps you might beable to help with a problem
here that seems to have all the "guru's" I have consulted stumped.
Here''s the layout:
Linux darkstar 2.0.23 #3 Fri Jun 6 20:52:07 CDT 1997 i586 I have the linux machine here, darkstar.sysinfo.com on 22.214.171.124 ppp0, with a 3com 509b card <called blackhole.sysinfo.com 192.168.80.1 eth0. The inside net has a win 3.11 and a win95 machine, 192.168.80.10 and 192.168.80.20, both set with 192.168.80.1 <blackhole> as their gateway. I can watch all the packets on 192.168.80.0/255 with various net tools, incuding tcpdump. the win machines can play togeth fine. but, blackhole will not recognize their packets, and they seem to not see those of blackhole. So, there at this point is nothing getting masqueraded out. All policies for ipfw are accept, to make it as open as possible now. <damn, the buffered space here is hardly adequate to give a proper rundown of what is really being observed over ehre, sorry>