[tproxy] [HELP] Tproxy server Can't receive any client packet

KOVACS Krisztian hidden at balabit.hu
Wed Nov 25 09:30:40 CET 2009


On Mon, 2009-11-23 at 15:51 +0900, 박제호 wrote:
> 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 ?

Would you mind testing the setup with an unpatched upstream kernel, that
has tproxy built-in? (2.6.31, for example)

Also, please download the latest iptables from netfilter.org and try
using that. (No need for patching, tproxy support is in upstream.)

That would help a lot in identifying the source of the issue. Thanks in


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