The term "sssr" does not appear to be a widely recognized acronym or term in the context of VPN services. It may be a typo or a miscommunication. If you are referring to a specific VPN service or feature, it would be best to clarify the context or check for a different term that accurately describes the service. If "sssr" is intended to be part of a specific community or forum, you might need to ask for clarification to understand its meaning in that context. In any case, it's crucial to ensure that any terms or abbreviations used are clear and widely recognized to avoid confusion.