Tarun Khanna <tkhanna@xxxxxxxxxx> wrote:
I have an application that acts as a transparent proxy for tcp flows. I need
to get packet and byte counters for these tcp flows on both sides of the
proxy application. I looked at pulling the counters from the kernel using
libnetfilter_conntrack. However I noticed that the conntrack library only
shows one entry for flows that are terminated transparently. This is an
issue, as I am not able to see byte and packet counters for the two sides of
the flow separately. Is there a way to get the separate counters for flows
that are transparently terminated?
If the flow is terminated but not transparently, I do get two separate
entries from libnetfilter_conntrack, and the counters are as I would expect
them to be.
In transparent case conntrack cannot tell the two connections apart as
they use the same addresses.
You could try to place one side into another conntrack zone using
'-j CT --zone $x' in the raw table.
Thank you. That sounds promising. I'll give it a shot.
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