NAT行為確認note 基於RFC5780所記載對於NAT的行為確認Determining NAT Mapping NAT背後的client希望確定當前NAT 映射的類型,使用OTHER-ADDRESS屬性執行測試,這些測試將綁定請求到STUN被服務器的備用地址和port,已確定映射行為 Determining NAT Filtering Binding Lifetime Discovery Diagnosing NAT Hairpinning Determining Fragment Handling Detecting a Generic Application Level Gateway (ALG)