Torblog has a recent (Sep 2015) write up on how the great firewall detects and kills Tor connections/bridges hence the need for using Obfsproxy4 as a pluggable

Torblog has a recent (Sep 2015) write up on how the great firewall detects and kills Tor connections/bridges hence the need for using Obfsproxy4 as a pluggable transport https://blog.torproject.org/blog/learning-more-about-gfws-active-probing-system https://blog.torproject.org/blog/learning-more-about-gfws-ac...