Date: Sun, 24 Nov 2019 19:34:51 +0700 From: Victor Sudakov <vas@sibptus.ru> To: freebsd-net@freebsd.org Subject: Several hosts behind a caching resolver Message-ID: <20191124123451.GA6593@admin.sibptus.ru>
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--FL5UXtIhxfXey3p5 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Dear Colleagues, Several hosts of the local network use a FreeBSD server with BIND or local-unbound as a caching resolver. Let's call it "Resolver A." Resolver A forwards all queries to another resolver, e.g. 8.8.8.8 or some other, let's call it "Resolver B." Can the operator of Resolver B figure out how many clients there are behind Resolver A, or obtain any other information about the hosts on the said local network (like their operating system etc)? In other words, does Resolver A effectively anonymize the queries, or is some information about the internal network leaking? --=20 Victor Sudakov, VAS4-RIPE, VAS47-RIPN 2:5005/49@fidonet http://vas.tomsk.ru/ --FL5UXtIhxfXey3p5 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEcBAEBAgAGBQJd2njqAAoJEA2k8lmbXsY0BO8IALqWilw8iv2Xkg7JKXIzjyRg 9qfDHgXAMyZ7U8FzkUN0/Hb8O270KL6rllYSJLL53Jshj4dqHeG5I1xuN1WSWZBn 0u+LcJsnbM6OGTSU5qL3gS6sXYiT1dTI6bhqzRquOtyQ9GFFjf5TwN4o3wBl0xty ARP53EoMytGEB2B967LrVO+2/Cm7/sI9iiE5oXP7o6nWmKaXLmPLaILIoYmDDTiO zJK/z3rZ65s0zrvo6jLeG5kTY/pv3C8XjnYspB3bI1v4sT0KVtme/k6cH+BSU+X6 CqjHLyXitV5H6nNm8Bpy1wo1KAsu6UkeJrKtaQueo4QkPWPS43Ru/bvrqw8Vwac= =feQx -----END PGP SIGNATURE----- --FL5UXtIhxfXey3p5--
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