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d535c8a69c
Currently DNS resolvers that send both A and AAAA queries from same source port can trigger stream mode prematurely, which results in non-early-evictable conntrack entry for three minutes, even though DNS requests are done in a few milliseconds. Add a two second grace period where we continue to use the ordinary 30-second default timeout. Its enough for DNS request/response traffic, even if two request/reply packets are involved. ASSURED is still set, else conntrack (and thus a possible NAT mapping ...) gets zapped too in case conntrack table runs full. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.