On Fri, Nov 18, 2016 at 11:04:48AM -0500, Richard Brooks wrote: > analysis. Does anyone have write ups on what national > firewalls are using to filter traffic? > > There are the obvious DNS names, IP addresses, port numbers > and keywords in the traffic content. > > What other header fields may be inspected?
<https://censorbib.nymity.ch/pdf/Marczak2015a.pdf> <https://censorbib.nymity.ch/pdf/Ensafi2015b.pdf> At least the Great Firewall of China is known to have used TLS headers as distinguishers: <https://trac.torproject.org/projects/tor/ticket/4744> -- Liberationtech is public & archives are searchable on Google. Violations of list guidelines will get you moderated: https://mailman.stanford.edu/mailman/listinfo/liberationtech. Unsubscribe, change to digest, or change password by emailing moderator at compa...@stanford.edu.
