サラトガIT日記｜getRemoteAddrã§IPv4ã¨IPv6 - ã‚µãƒ©ãƒˆã‚¬ç‰§å ´ -Java ã® HttpServletRequest#getRemoteAddr() ã§ã€ãƒªãƒ¢ãƒ¼ãƒˆã® IP アドレスãŒå–å¾—ã§ãã‚‹ã®ã§ã™ãŒã€ã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆã® OS 環境ã«ã‚ˆã£ã¦ã¯ IPv6 ã®ã‚¢ãƒ‰ãƒ¬ã‚¹ãŒè¿”ã•ã‚Œã¾ã™ã€‚ ループãƒãƒƒã‚¯ã‚¢ãƒ‰ãƒ¬ã‚¹ã‚’例ã«ã™ã‚‹ã¨ä¸‹è¨˜ã®ã‚ˆã†ãªé•ã„ã§ã™ã€‚ [IPv4] 127.0.0.1 [IPv6] 0:0:0:0:0:0:0:1 Tomcat 環境ã§ã¯ IPv6 ã®ã‚¢ãƒ‰ãƒ¬ã‚¹ã‚’優先的ã«è¿”ã™ã®ã§ã€ ã“れを IPv4 ã®ã‚¢ãƒ‰ãƒ¬ã‚¹ã‚’優先ã«ã™ã‚‹ã«ã¯ Java 起動時㮠オプションã«ä¸‹è¨˜ã‚’è¿½åŠ ã—ã¾ã™ã€‚ -Djava.net.preferIPv4Stack=true Linux ã 㨠catalina.shã€Windows ã 㨠catalina.bat 㫠記述ã—ã¦ãŠãã¨ã„ã„ã®ã§ã—ょã†ã‹ã€‚ [ドã‚ュメント] ※JDK1.5 http://java.sun.c
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