Dear all: I have install freebsd 4.x,and have two netcards. I want it as getway. I have config gateway_enable=3DYES in rc.conf,and then reboot. [a pc]--------[freebsd]-------[b pc] After reboot , I try to use a pc to ping b pc ,it`s not work ,but a pc = and b pc can ping freebsd successful,why? Please give me a hand. Thanks!! LILY