Hi all, I used this shell command to enable the rp_filter functionality on my router: for f in /proc/sys/net/ipv4/conf/*/rp_filter; do echo 1 > $f done There're two devices while one is ppp0 and the other routes all packets straight into the LAN. Is this required or recommended to activate rp_filter on all devices or should only eth1 or ppp0 be filtered to avoid spoofing ? -- Best Regards, Mark