rfc에서 UDP를위한 UNSAF 방법 4787

Question

나는 rfc 4787을 통과했으며 저자는 UNSAF 방법에 대해 언급했다. UNSAF 방법이란 무엇입니까?

Answer 1

selbie는 UNSAF가 RFC 3424에 정의되어 있고 일방적 인 자체 주소 고정을 의미한다고합니다.

클라이언트가 NAT 뒤에있는 경우 외부 주소를 알 수 없습니다. 이 RFC에 따르면

As a result of the nature of Network Address Translation (NAT) 
Middleboxes, communicating endpoints that are separated by one or 
more NATs do not know how to refer to themselves using addresses that 
are valid in the addressing realms of their (current and future) 
peers. Various proposals have been made for "UNilateral Self-Address 
Fixing (UNSAF)" processes. These are processes whereby some 
originating endpoint attempts to determine or fix the address (and 
port) by which it is known to another endpoint - e.g. to be able to 
use address data in the protocol exchange, or to advertise a public 
address from which it will receive connections.