My neighbours are stealing my wireless internet access. I could encrypt it or alternately I could have fun. Split the network I'm starting here by splitting the network into two parts, the trusted half and the untrusted half. The trusted half has one netblock, the untrusted a different netblock. We use the DHCP server to identify mac addresses to give out the relevant addresses. /etc/dhcpd.conf ddns-updates off; ddns-update-style interim; authoritative; shared-network local { subnet *.*.*.* netm...