нашёл:
Feb 08 2017 17:14:10 <CryptoSiD> Hi guys, is tunnelbroker blocking
rt.com?!
Feb 08 2017 17:14:20 <CryptoSiD> since ~2 weeks or so
Feb 08 2017 17:16:34 <CryptoSiD> as soon as i disable ipv6 im able to go on the site without issue
Feb 08 2017 17:20:28 <CryptoSiD> yes im able to ping it, i suspect an MSS/MTU problem