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Route Rendezvous between networks
Authored by: etrepum on Jul 24, '03 05:25:48PM
On our network, which uses an OpenBSD 3.3 box with a whole lot of ethernet ports, I use the following pf rules to bridge rendezvous between the wireless and wired LANs:
pass in on $if_trusted dup-to $if_wlan inet proto udp from any to 224.0.0.25
1 port = 5353
pass in on $if_wlan dup-to $if_trusted inet proto udp from any to 224.0.0.25
1 port = 5353
Note that this only works if $if_trusted and $if_wlan are in promiscuous mode.. which unfortunately ifconfig won't do for you, but snort, tcpdump, or a program like this one can do that for you.

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