On Sat, 27 Aug 2011 19:46:12 -0400 Sam Varshavchik <mr...@courier-mta.com> wrote:
> I forwarded a port, using system-config-firewall. > > The destination machine, not surprisingly, shows the IP address of > the firewall as the source of the connection. The goal is obtaining > the connection's real source IP. However, on the firewall the > forwarded connection isn't reported anywhere by netstat or ss. This is a DNAT forward? it should show the IP of whatever machine is sending the request, not the firewall box in the middle. > After poking around, I found what I was looking for in > /proc/net/nf_conntrack. The forwarded connection was listed there, > showing the connection's real source IP. > > But grepping through /proc/net/nf_conntrack seems to be rather > quaint. Neither netstat's nor ss's man page hint at any option that > would report on /proc/net/nf_conntrack in some user-friendly fashion. > Is there some other admin utility that does? conntrack-tools has a 'conntrack' command line tool. kevin
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