Well, here goes: iptables -t nat -I PREROUTING -d 192.168.10.100 -j DNAT --to 192.168.10.245 iptables: Target problem At least, now the error message changed and the only difference from before is the -I instead of -A. So, with -A, I get Invalid Argument, and with -I, I get Target Problem. Both cases don't work and the rule doesn't get added. Can anybody give me a clue? Cheers, -- Herman Oosthuysen B.Eng(E), MIEEE Aerospace Software Ltd. Ph: 1.403.241-8773, Cell: 1.403.852-5545, Fx: 1.403.241-8841 Herman@xxxxxxxxxxxxxxxxxxxxx, http://www.AerospaceSoftware.com