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This target marks packes so that the kernel will log every rule which match
the packets as those traverse the tables, chains, rules.
A logging backend, such as ip(6)t_LOG or nfnetlink_log, must be loaded for this
to be visible.
The packets are logged with the string prefix:
"TRACE: tablename:chainname:type:rulenum " where type can be "rule" for
plain rule, "return" for implicit rule at the end of a user defined chain
and "policy" for the policy of the built in chains.
It can only be used in the