Hi All,

I have a problem with my firewall settings.

Currently, tproxy cannot work with with FTP in active mode.

In my firewall settings, I have

                …………

        iptables -A INPUT -m tproxy -j ACCEPT    # Accept all traffic for tproxy??

        #### Default Drop everything in INPUT chain

        iptables -P INPUT DROP                          # NOTE the default DROP policy

        iptables -P OUTPUT ACCEPT

                ………

For Active FTP, my proxy server is listening on behalf of the connected client but somehow the FTP server cannot connect back due to the firewall DROP policy on INPUT.

What I want is to accept all tproxy traffic even with the default DROP policy.

Will “iptables -A INPUT -m tproxy -j ACCEPT” impose any security concerns?

Thanks very much for any help.

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