Access to the Internet in Iran is presently subject to official censorship,
although the precise scope and scale of the filtering is unclear.As part of
its ongoing research into Internet censorship and surveillance worldwide,
including in Iran, the ONI connected to remote computers in Iran and tested
the RSF list and the blacklist obtained by stop.censoring.us. We found that
Iran is indeed engaged in extensive Internet content filtering beyond just
pornography, including many political, religious, social, and blogging
websites. However, we cautiion that the case presented here provides an
instructive lesson concerning the type of limited conclusions that can and
should be drawn about both the extent and character of Internet censorship in
any country.
The full bulletin is available here: http://opennetinitiative.net/bulletins/004/