Hello everyone ~ i have a problem in my transparent proxy test, i recently made up the testbed as below to run the tproxy patched apache proxy [mod_proxy], and i applied all iptables and routing rules with referencing the readme file [http://www.balabit.com/downloads/files/tproxy/README.txt, http://www.mjmwired.net/kernel/Documentation/networking/tproxy.txt] the proxy server listening the port 3128 and i checked there were no problem. but when the client tried to connect the web server, the packets reached to the box and i found the usage counts of filter rules in the mangle table incresed but my tproxy server could not receive any corresponding packet from the socket I want to know why my proxy server can't receive any packet through the socket, Do i need some more DNAT rules ? ---------------- testbed --------------- [client ] <-----> [tproxy patched apache mod_proxy] <-----> [web server] --------------------------------------------------- proxybox [Environment of the tproxy server] 1. kernel kernel 2.6.24 + tproxy-kernel-2.6.24-20080602-165651-1212418611.tar.bz2 [http://www.balabit.com/downloads/files/tproxy/tproxy-kernel-2.6.24-20080602-...] 2. iptables iptables 4.0 + tproxy-iptables-1.4.0-20080521-113954-1211362794.patch [http://www.balabit.com/downloads/files/tproxy/tproxy-iptables-1.4.0-20080521...] 3. apache apache 2.2.9 + httpd-2.2.9-tproxy.patch [i got this patch from google and ported it to this version ] 4. iptables and routing rules #!/bin/sh IPTABLES=/usr/local/sbin/iptables ${IPTABLES} -t nat -A PREROUTING -p tcp --dport 80 -j DNAT --to 127.0.0.1:3128 ${IPTABLES} -t mangle -N DIVERT ${IPTABLES} -t mangle -A DIVERT -j MARK --set-mark 1 ${IPTABLES} -t mangle -A DIVERT -j ACCEPT ${IPTABLES} -t mangle -A PREROUTING -p tcp -m socket -j DIVERT ${IPTABLES} -t mangle -A PREROUTING -p tcp --dport 80 -j TPROXY --tproxy-mark 0x1/0x1 --on-port 3128 ip rule add fwmark 0x1/0x1 lookup 100 ip route add local 0.0.0.0/0 dev lo table 100 sysctl net.ipv4.ip_nonlocal_bind=1 sysctl net.ipv4.ip_forward=1 here are the config files of the kernel and apache proxy previously thanks~