I have a fairly vanilla home LAN with an Internet provider-supplied router providing DHCP. The router uses many of its default settings unmodified. The home network is 192.168.1.0/24 and the router itself is known internally as 192.168.1.1.
I need to configure several similar routers to change their default settings. One of my computers (running FreeBSD) has a spare Ethernet interface (
bce0) and I connected one of these additional routers to it. As expected, this router also uses 192.168.1.1. The machine now has two "configured" interfaces:
bce1-- 192.168.1.8, which is connected to the "real" router, connecting it to the Internet and the rest of the home LAN
bce0-- 192.168.1.5, which is connected to the second router, which I need to change to use different network settings
How can I reach this second router without breaking the machine's connectivity with the LAN and the Internet? Simply trying to reach 192.168.1.1 goes through
bce1 and reaches my normal router...
ipfw(8) somehow force certain packets to go out using
bce0 instead of
bce1? Preferably, without the use of "fib", because adding one requires a reboot...