US law prohibits us from providing our software to specific countries; given that a portion of our products are open source, this restriction is enforced during the activation process. This Wikipedia link lists the countries that are on the US embargo list: https://en.wikipedia.org/wiki/United_States_embargoes
If your country is not listed but specific persons in your country are, and the rules indicate we must block access unless we know otherwise - something that is difficult to do. You're still free to use the open source Metasploit Framework, which doesn't require registration, but the commercial interface will not be available. Sorry for the inconvenience.