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Ç¥ÁعøÈ£ | TTAE.IF-RFC3142 | ±¸Ç¥ÁعøÈ£ | |
---|---|---|---|
Á¦°³Á¤ÀÏ | 2005-12-21 | ÃÑÆäÀÌÁö | 22 |
ÇѱÛÇ¥Áظí | IPv6¿Í IPv4 °£ÀÇ Æ®·£½ºÆ÷Æ® ¸±·¹ÀÌ Àüȯ±â¹ý | ||
¿µ¹®Ç¥Áظí | An IPv6-to-IPv4 Transport Relay Translator | ||
Çѱ۳»¿ë¿ä¾à | IPv6 ¸¸ÀÌ Á¸ÀçÇÏ´Â ³×Æ®¿öÅ©¸¦ º¸±ÞÇÏ°íÀÚ ÇÒ ¶§, ¿ì¸®´Â ¿ÜºÎ¿¡ À§Ä¡ÇÑ IPv4 ¸¸À» °¡Áö°í ÀÖ´Â IPv4-only À¥ ¼¹ö¿Í °°Àº ³×Æ®¿öÅ© ÀÚ¿øµé¿¡ Á¢±ÙÇϱ⸦ ¿øÇÑ´Ù. ÀÌ¿Í °°Àº ¹®Á¦¸¦ ÇØ°áÇϱâ À§ÇØ, º» Ç¥ÁØÀº Æ®·£½ºÆ÷Æ® ¸±·¹ÀÌ ±â¼ú±â¹ÝÀÇ º¯È¯±â¹ýÀ» ±â¼úÇÑ´Ù. ÀÌ¿Í °°Àº º¯È¯±â¹ýÀ» ¾àÀÚ·Î "TRT" (transport relay translator)¶ó°í ºÎ¸£±â·Î ÇÑ´Ù.TRT ½Ã½ºÅÛÀº IPv6 ½ºÅø¸ žÀçÇÑ È£½ºÆ®µé°ú IPv4¸¸ žÀçÇÑ È£½ºÆ®µé »çÀÌ¿¡ À§Ä¡ÇÏ¿©,{TCP, UDP}/IPv6¿Í {TCP, UDP}/IPv4 °£¿¡ º¯È¯ÇÏ´Â ¿ªÇÒÀ» ¼öÇàÇÑ´Ù.IPv4¿Í IPv4 °£ÀÇ Æ®·£½ºÆ÷Æ® ¸±·¹À̸¦ À§ÇØ, TCP¿Í UDP ¸±·¹ÀÌ°¡ »ç¿ëµÈ´Ù. TCP ¸±·¹ÀÌ ½Ã½ºÅÛÀº ¹æȺ®°ú ¿¬°üµÈ Á¦Ç°µé°ú ÇÔ²² »ç¿ëµÇ¾î ¿Ô´Ù. UDP ¸±·¹ÀÌ ½Ã½ºÅÛÀº Àιٿîµå¿Í ¾Æ¿ô¹Ù¿îµå Æ®·¡ÇÈÀÇ ½ÖÀ» ÀνÄÇÒ ¼ö¸¸ ÀÖ´Ù¸é TCP ¸±·¹ÀÌ¿Í À¯»çÇÑ ¹æ¹ýÀ¸·Î ±¸ÇöÇÒ ¼ö ÀÖ´Ù. ±¸Çö ¹æ½ÄÀº ¸ÕÀú NAT ½Ã½ºÅÛÀÇ µ¿ÀÛó·³ UDP Æ®·¡ÇÈÀ» ÀνÄÇÑ ÈÄ¿¡, Å×ÀÌºí¿¡ ÁÖ¼Ò¿Í Æ÷Æ® ½ÖÀ¸·Î ÀúÀåÇÏ°í ÀÏÁ¤ÇÑ Å¸ÀӾƿô °ªÀ» ¼³Á¤ÇØ ³õ´Â´Ù. IPv6¿Í IPv4 °£ÀÇ Æ®·£½ºÆ÷Æ® ¸±·¹ÀÌ º¯È¯±â¹ýÀÇ °æ¿ì, ¿ì¸®´Â IPv6¿Í IPv4 ÇÁ·ÎÅäÄÝ º¯È¯À» À§ÇØ TRT¸¦ »ç¿ëÇÑ´Ù. ¿¹·Î, TCP¸¦ À§ÇÑ TRT ÁÖ¼Ò ¸ÅÇÎÀ» À§ÇØ, IPv6 ÇÁ¸®ÇȽº´Â C6::/64¸¦ »ç¿ëÇÑ´Ù. C6::/64´Â ƯÁ¤ »çÀÌÆ®¿¡ ÇÒ´çµÈ IPv6 À¯´Ïij½ºÆ® ÁÖ¼Ò °ø°£ÀÇ ÀϺΠÀÌ´Ù. ¶ÇÇÑ ¶ó¿ìÆà Á¤º¸°¡ ¼³Á¤µÇ¾î¾ß Çϸç, C6::/64·Î º¸³½ ÆÐŶµéÀº TRT ½Ã½ºÅÛ ÂÊÀ¸·Î ¶ó¿ìÆÃµÉ °ÍÀÌ´Ù. TCP¸¦ À§ÇÑ TRTó·³, UDP¸¦ À§ÇÑ TRTµµ À¯»çÇÑ ¹æ¹ýÀ¸·Î ±¸ÇöµÉ ¼ö ÀÖ´Ù. | ||
¿µ¹®³»¿ë¿ä¾à | When you deploy an IPv6-only network, you still want to gain access to IPv4-only network resources outside, such as IPv4-only web servers. To solve this problem, this standard describes a translator based on the transport relay technique. We call this kind of translator "TRT" (transport relay translator). A TRT system locates between IPv6-only hosts and IPv4 hosts and translates {TCP, UDP}/IPv6 to {TCP,UDP}/IPv4, vice versa. For IPv4-to-IPv4 transport relay, TCP and UDP relay are used. TCP relay systems have been used in firewall-related products. These products are designed to achieve the following goals: (1) disallow forwarding of IP packets across a system, and (2) allow {TCP,UDP} traffic to go through the system indirectly. On the other hand, if you can recognize UDP inbound and outbound traffic pair in some way, UDP relay can be implemented in similar manner as TCP relay. An implementation can recognize UDP traffic pair like NAT systems does, by recording address/port pairs onto an table and managing table entries with timeouts. For IPv6-to-IPv4 transport relay translator, we propose a transport relay translator for IPv6-to-IPv4 protocol translation, TRT. For address mapping in TRT for TCP, we reserve an IPv6 prefix referred to by C6::/64. C6::/64 should be a part of IPv6 unicast address space assigned to the site. Routing information must be configured so that packets to C6::/64 are routed toward the TRT system. Like TRT for TCP, TRT for UDP can be implemented in similar manner. | ||
±¹Á¦Ç¥ÁØ | IETF RFC 3142 | ||
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