SourceForge has project settings to help you comply with regulations governing distribution of software to persons from certain countries (aka Export Controls).
If you are not sure how your project aligns in relation to the laws, we recommend that you consider consulting the Software Freedom Law center. In addition, the relevant regulations from the U.S. Government can be found at: http://www.bis.doc.gov/ and http://www.treas.gov/offices/enforcement/ofac/.
By default, software downloads initiated by visitors from Sudan, North Korea, Syria, Iran and Cuba are blocked.
A project administrator may disable this blocking if they conclude that their project is not subject to US export-related regulations or any prohibitions of applicable jurisdictions: