[4.10-R]Getting A Particular BRIDGE Setup Working

[The Jetman]

I've made a nbr of BRIDGE boxes w/ various revs of FBSD, but I always 
get stuck w/ one configuration.  Currently, I have a firewall/gateway 
box (also FBSD) which connects to the 'Net via a DSL modem.  If I place 
my BRIDGE on the exterior leg (bet the gateway and the DSL modem), it 
works perfectly.  That is, traffic passes thru the BRIDGE as expected.  
Unfortunately, I can't get detailed traffic stats, since the internal 
workstations'traffic have been NAT'd into a single traffic stream by 
the firewall.  FWIW, I use two IP-less Ethernet cards for the BRIDGE 
itself and another Ethernet w/ an IP, plugged into my switch, to control 
the BRIDGE box itself and to look at the traffic stats.  BTW, the traffic 
stats app (NTOP) works perfectly, under this arrangement.

The problem manifests itself if I connect the BRIDGE box to the 
interior Ethernet leg of the firewall/gateway, thereby connecting it 
to the switch, along w/ the BRIDGE's control port.  The BRIDGE fails and 
I always get spurious error messages from ARP, indicating one of my 
IP-less Ethernet cards is using the IP address of my control port.  If I 
lose the control port (disconnect it), the BRIDGE works fine, but I can't 
see any traffic stats, the principal purpose of the BRIDGE.

Is there a SYSCTL variable to control this behavior or perhaps something 
else I'm not aware of ?  TIA.  Later....Jet



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