WebFaction hosts servers in a number of data-centres all around the world, including in the U.S, Europe and Asia. Several of those data-centres are owned by a US company called SoftLayer.
Starting on the February 1st, 2016. SoftLayer will implement a network-wide blocking of IP addresses that originate from countries that are subject to U.S. trade and economic sanctions. Currently, these countries are Cuba, Iran, North Korea, Sudan, and Syria. This means that Internet users in those countries will not be able to access websites hosted in the SoftLayer data-centres.
If it is important that your websites can be accessed from any of those countries, please let us know. We can tell you if your data-centre is one which is impacted by this block and help migrate your website to a different data-centre.