[tproxy] Can't receive any client packet in the tproxy server

박제호 jhpark at elim.net
Thu Nov 19 03:45:38 CET 2009

Hello everyone and Balazs Scheidler ~

i have one problem,  i recently made up the testbed like below to run the tproxy patched apache proxy,
so i applied all iptables and routing rules with reading the readme file [http://www.balabit.com/downloads/files/tproxy/README.txt]
but  when the client tried to connect the web server,  the packets reached to the box but my tproxy server could not receive any corresponding packet from clients
i want to know why my proxy server can't receive any packet
do i need some DNAT rules ?


[client ] <---------> [tproxy patched apache mod_proxy] <--------> [web server]

    1. OS: linux vanilla kernel
    2. iptables: 1.4.5 , no tproxy patched 
    3. proxy:   tproxy patched [ please refer to the httpd-2.2.9-tproxy.patch ] APACHE 2.2.9
    4. iptables and routing rules

        iptables -t mangle -A PREROUTING -p tcp --dport 80 -j TPROXY --on-port 3128 --tproxy-mark 0x1/0x1

        ip rule add fwmark 1 lookup 100
        ip route add local dev lo table 100

        iptables -t mangle -N DIVERT
        iptables -t mangle -A PREROUTING -p tcp -m socket -j DIVERT
        iptables -t mangle -A DIVERT -j MARK --set-xmark 0x1/0xffffffff
        iptables -t mangle -A DIVERT -j ACCEPT

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