Mohsen Borhani, a law professor at Tehran University who has openly supported protests, says he has been "suspended" from his position.
Borhani said on September 25 that he is no longer allowed to teach as the new academic year began on September 23.
He also said that he is facing legal action from multiple security agencies over his comments on the government's handling of nationwide protests and the execution of demonstrators.
The authorities are increasing their crackdown on dissent following last year’s anti-establishment protests, a movement that posed the biggest threat to the country's leaders since the revolution in 1979.
Security forces killed more than 500 people in their clampdown on protests and more than 18,000 were unlawfully detained, including many students.
In recent months, many professors who have been critical of the government or have supported protesting students have been dismissed or suspended from their positions.
Borhani had been teaching at the university for 19 years.
In August, he disclosed that he was facing legal action from the Judicial Intelligence Protection Center, the IRGC Intelligence Organization, the Police Intelligence Protection Center and a Guardian Council member.
He said that the "prosecution phase" had concluded and the case was now awaiting trial.