by Rex Wockner
A study by the OpenNet Initiative has found 25 countries that block access to Web sites based on political or social reasons.
Gay sites are censored in Iran, Oman, Saudi Arabia, Sudan, Tunisia, the United Arab Emirates and Yemen, along with porn and gambling sites, the study found.
Countries that target political sites include China, Iran, Myanmar, Syria, Tunisia and Vietnam. South Korea only blocks information about North Korea.
Blocking usually can be circumvented by savvy Net users using proxy servers or special software.
The research was carried out via volunteers in the nations being tested.