Sai - Google+ - I have pretty definitive proof that Iran is doing…

Filtering is being done by eg This hop is after my source's ISP. The filtering IPs are owned by ITC, Iran's central telco. It's http://bgp.he.net/AS12880 (h/t to Tor team for that).

Filtering targets all google.com IPs, some but not all torproject.org IPs, probably more. Haven't attempted a broad scan. It's a simple connection drop; filtered connections just time out.

It is not based on SSL handshake signature; testing SSL on nonstandard ports worked successfully, and testing non-SSL on :443 of target IPs was blocked.

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