OsmoGGSN/FreeBSD notes FreeBSD support is experimental, please test and report bugs. The FreeBSD port is tested on FreeBSD 4.x, but may also work on 5.x series. 1. Compiling You will need GNU make installed, standard BSD make will not work. Everything should be straight-forward, run ./configure then gmake. 2. Kernel tuning Your kernel needs to include tun driver (GENERIC kernel does), make sure your kernel config file contains the line pseudo-device tun or load the tun kernel module manually by issuing "kldload if_tun" as root. OpenGGSN doesn't try to load the module itself right now. Also make sure your kernel has IP Forwarding enabled (it is not by default). Add the line gateway_enable=yes to your /etc/rc.conf or manually issue "sysctl net.inet.ip.forwarding=1" 3. Known problems After ggsn is started, you have to manually add the route for your address pool: route add 192.168.0.0 -netmask 255.255.255.0 -iface tun0 -- Pavel Andreev