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UNSAF Considerations (RFC3424) What: "UNilateral Self-Address Fixing (UNSAF)" some originating process attempts to determine or fix the address (and port) by which it is known to be able to use address data in the protocol payload to advertise a public address from which it will receive connections. Why: NATs cause discontinuity in address realms originating process may not know about that discontinuity the mapping is locked up in the NAT box |