Thanks for your answer. As soon as receiving your reply, I tried those and results are below. OS version : linux-2.6.12.6 with cttproxy-2.6.10-2.0.1.tar.gz test status ======================================================== bridging - on (not working) bridging - off (not working) using TPROXY rule instead of REDIRECT (not working, halting system) REDIRECT Rule without Bridging : iptables -t nat -A PREROUTING -i eth1 -d 192.168.0.107 -p tcp --dport 9999 -j REDIRECT --to-port 9216 TPROXY target Rule : iptables -m physdev -t tproxy -A PREROUTING --physdev-in eth1 -d A.B.C.D tcp --dport 80 -j TPROXY --on-port 2101 My poor daemon couldn't read any data in any contditions. )-;