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Ç¥ÁعøÈ£ TTAE.IF-RFC3581 ±¸Ç¥ÁعøÈ£
Á¦°³Á¤ÀÏ 2004-12-23 ÃÑÆäÀÌÁö 20
ÇѱÛÇ¥ÁØ¸í ´ëĪÀû ÀÀ´ä °æ·Î ¹èÁ¤À» À§ÇÑ SIP È®Àå
¿µ¹®Ç¥Áظí An Extension to the Session Initiation Protocol (SIP) for Symmetric Response Routing
Çѱ۳»¿ë¿ä¾à SIP ÇÁ·ÎÅäÄÝÀÌ UDP»ó¿¡¼­ »ç¿ëµÉ °æ¿ì, ÀÀ´ä ¸Þ½ÃÁö´Â ¿äû ¸Þ½ÃÁöÀÇ ÃÖ»óÀ§ Via Çì´õ¿¡ ÀûÈù À§Ä¡·Î Àü¼ÛÀÌ µÈ´Ù. ÀÌ·¯ÇÑ µ¿ÀÛÀº »ç¿ëÀÚ ¿¡ÀÌÀüÆ® Ŭ¶óÀ̾ðÆ®(UAC)°¡ NAT ȯ°æ¿¡ ÀÖÀ» °æ¿ì¿¡´Â ¹Ù¶÷Á÷ÇÏÁö ¾Ê´Ù. º» Ç¥ÁØÀº ÀÀ´ä ¸Þ½ÃÁö°¡ ¿äû ¸Þ½ÃÁö¸¦ Àü¼Û ¹ÞÀº Æ÷Æ®¸¦ ÅëÇØ Àü´ÞµÉ ¼ö ÀÖµµ·Ï Via Çì´õ¿¡¼­ »ç¿ëÇÏ´Â ¡°rport¡± ÆĶó¸ÞÅ͸¦ Á¤ÀÇÇÑ´Ù.
¿µ¹®³»¿ë¿ä¾à When used with UDP, an SIP response to an request is delivered to the source address written into the topmost Via header field value of the request. This behavior is not desirable in many cases, most notably, when the client is behind a NAT. This standard defines a new parameter for the Via header field, called ¡°rport¡±, that allows a client to request that the server send the response back to the source IP address and port from which the request originated.
±¹Á¦Ç¥ÁØ IETF RFC 3581
°ü·ÃÆÄÀÏ TTAE_IF-RFC3581.zip TTAE_IF-RFC3581.zip            

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