A number of reactions are out there via blogs and Twitter.
Blogger Arman Dekami writes to Iranian Supreme Leader Ayatollah Khamenei:
A young Iranian activist, Vahid online, writes on Twitter: "Are you so afraid of your people's awareness and knowledge that you filtered Wikipedia? You filter an online dictionary so no one doubts your dictatorship?"
Blogger Mamoli says: "Wikipedia is not Balatarin (editor's note: a popular Persian community web portal), which you can block and say counterrevolutionaries were involved in it. It's a blow to your reputation. Of course your reputation has been damaged since last year -- for the past thirty years -- when I saw Wikipedia has been filtered I felt sick."
Mamoli later adds, though, that the block on Wikipedia content appears to have been removed.
Iran is one of the world's toughest Internet censors.
-- Golnaz Esfandiari