Iran have been in the headlines over the last few months from putting up fences to their Internet access, creating a type of intranet. Popular websites like YouTube and Facebook can only be accessed through VPN, which bypasses Iran's filter.
From now on, this might prove to be an issue as Iran is stopping this "illegal" VPN access. Ramezanali Sobhani-Fard, Iran's head of information and communications technology committee has said "Within the last few days illegal VPN ports in the country have been blocked. Only legal and registered VPNs can from now on be used." Typical workarounds to this will not work, but registered and legal VPN access is still a way to get around it, for now.