BLOCKING TECHNIQUES

  IP blocking DNS tampering Blockpage Keyword
Azerbaijan X   X  
Bahrain   X X  
China X     X
Ethiopia X      
India X X    
Iran     X X
Jordan X      
Libya X      
Myanmar     X  
Oman     X  
Pakistan X X    
Saudi Arabia     X  
Singapore     X  
South Korea X X X  
Sudan     X  
Syria     X  
Thailand     X  
Tunisia     X  
United Arab Emirates     X  
Uzbekistan[*]     X  
Vietnam   X X  
Yemen     X X
Blocking behavior included in this table may include international gateway level filtering, and filtering techniques used by different ISPs.
[*]In Uzbekistan, the blockpage does not clearly indicate that filtering is occurring but rather redirects users to a third-party Web site.