SILS is a part of Serval Infrastructure. SILS allows mesh subscribers to register their Internet addresses so that they can be reached via Internet (eg, using Serval Internet Routing Service (SIRS)) from any other Mesh network that has access to the same SILS service.

• Maps Serval Identity (SID) → IP address + port number (sockaddr_in)
• Keeps a SIR (Subscriber Internet Registry)
• Accepts registrations (signed)
• Responds to location requests