Date: Fri, 7 Nov 2014 03:20:17 -0500 From: grarpamp <grarpamp@gmail.com> To: tor-relays@lists.torproject.org Cc: freebsd-net@freebsd.org Subject: Re: [tor-relays] FreeBSD's global IP ID (was: Platform diversity in Tor network) Message-ID: <CAD2Ti2-eKzbU3trE0qiTDdK73hsxNGuRy7VJee52%2BWmNC5H%2BmA@mail.gmail.com> In-Reply-To: <20141106135228.GE3824@nymity.ch> References: <CAD2Ti28BFsedyPC7VBR-Rz8c2_4CAQDnBFopnRHEX45sgqmjtA@mail.gmail.com> <20141106135228.GE3824@nymity.ch>
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On Thu, Nov 6, 2014 at 8:52 AM, Philipp Winter <phw@nymity.ch> wrote: > On Wed, Nov 05, 2014 at 04:04:41AM -0500, grarpamp wrote: >> 173 FreeBSD > > FreeBSD still seems to use globally incrementing IP IDs by default. > That's an issue as it leaks fine-grained information about how many > packets a relay's networking stack processes. (However, nobody > investigated the exact impact on Tor relays so far, which makes this a > FUD-heavy topic.) It looks like approximately 50 out of the 131 FreeBSD > relays I tested (38%) use global IP IDs. > > There's a sysctl variable called "net.inet.ip.random_id" which makes a > FreeBSD's IP ID behaviour random. FreeBSD relay operators should set > this to "1". > > Note that this issue was already discussed earlier this year in a thread > called "Lots of tor relays send out sequential IP IDs; please fix > that!". It's been default off since before it was a sysctl over a decade ago. Anyone know what the deal is with that? Some objection, or forgotten flag day, or oversight that really should be set to 1? https://svnweb.freebsd.org/base?view=revision&revision=133720 _______________________________________________ tor-relays mailing list tor-relays@lists.torproject.org https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-relays
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