{"id":17012,"date":"2025-04-18T23:27:54","date_gmt":"2025-04-18T15:27:54","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/17012.html"},"modified":"2025-04-18T23:27:54","modified_gmt":"2025-04-18T15:27:54","slug":"%e6%9c%8d%e5%8a%a1%e5%99%a8%e7%bb%91%e5%ae%9a-127-0-0-1-%e5%92%8c-0-0-0-0-%e7%9a%84%e5%8c%ba%e5%88%ab","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/17012.html","title":{"rendered":"\u670d\u52a1\u5668\u7ed1\u5b9a 127.0.0.1 \u548c 0.0.0.0 \u7684\u533a\u522b"},"content":{"rendered":"

\u524d\u8a00<\/h2>\n

IP \u5730\u5740\u5b9e\u9645\u4e0a\u5e76\u4e0d\u662f\u5206\u914d\u7ed9\u8ba1\u7b97\u673a\u7684，\u800c\u662f\u5206\u914d\u7ed9\u7f51\u5361\u7684，\u56e0\u6b64\u5f53\u8ba1\u7b97\u673a\u4e0a\u5b58\u5728\u591a\u5757\u7f51\u5361\u65f6，\u6bcf\u4e00\u5757\u7f51\u5361\u90fd\u4f1a\u6709\u81ea\u5df1\u7684 IP \u5730\u5740\u3002<\/p>\n

\u7ed1\u5b9a 127.0.0.1 \u662f\u7ed1\u5b9a\u5230 lookback \u8fd9\u4e2a\u865a\u62df\u7684\u672c\u5730\u56de\u73af\u63a5\u53e3，\u8be5\u63a5\u53e3\u53ea\u5904\u7406\u672c\u673a\u4e0a\u7684\u6570\u636e，\u5982\u679c\u670d\u52a1\u5668\u7ed1\u5b9a 127.0.0.1 \u5916\u90e8\u662f\u65e0\u6cd5\u8bbf\u95ee\u7684\u3002<\/p>\n

\u7ed1\u5b9a 0.0.0.0 \u662f\u7ed1\u5b9a\u5230\u6240\u6709\u53ef\u7528\u7684\u7f51\u7edc\u63a5\u53e3，\u4e5f\u5c31\u662f\u8bf4，\u6b64\u65f6\u53ef\u4ee5\u63a5\u53d7\u6765\u81ea\u4efb\u4f55\u7f51\u7edc\u63a5\u53e3\u7684\u8fde\u63a5\u8bf7\u6c42，\u5916\u90e8\u662f\u53ef\u4ee5\u6b63\u5e38\u8bbf\u95ee\u7684\u3002<\/p>\n

\u5728 ubuntu \u7cfb\u7edf\u53ef\u4ee5\u7528 ifconfig \u547d\u4ee4\u67e5\u770b\u7f51\u7edc\u63a5\u53e3\u4fe1\u606f，Win \u7cfb\u7edf\u7528 ipconfig \u547d\u4ee4\u67e5\u770b\u3002<\/p>\n

$ ifconfig<\/span>
\neth0: flags<\/span>=<\/span>416<\/span>3<\/span><<\/span>UP,BROADCAST,RUNNING,MULTICAST><\/span> mtu 1500<\/span>
\n inet 172.30<\/span>.36.166 netmask 255.255<\/span>.240.0 broadcast 172.30<\/span>.47.255<\/p>\n

lo: flags<\/span>=<\/span>7<\/span>3<\/span><<\/span>UP,LOOPBACK,RUNNING><\/span> mtu 65536<\/span>
\n inet 127.0<\/span>.0.1 netmask 255.0<\/span>.0.0<\/p>\n

\u4e0b\u9762\u7528\u4ee3\u7801\u6765\u6f14\u793a\u4e24\u79cd\u60c5\u51b5\u7684\u533a\u522b\u3002<\/p>\n

\u7ed1\u5b9a 127.0.0.1<\/h2>\n

\u4ee5\u4e0b\u4ee3\u7801\u7531 \u901a\u4e49\u5343\u95ee 2.5 \u751f\u6210：<\/p>\n

func<\/span> handleConnection<\/span>(<\/span>conn net.<\/span>Conn)<\/span> {<\/span>
\ndefer<\/span> conn.<\/span>Close<\/span>(<\/span>)<\/span>
\nscanner :=<\/span> bufio.<\/span>NewScanner<\/span>(<\/span>conn)<\/span>
\nfor<\/span> scanner.<\/span>Scan<\/span>(<\/span>)<\/span> {<\/span>
\ntext :=<\/span> scanner.<\/span>Text<\/span>(<\/span>)<\/span>
\nfmt.<\/span>Println<\/span>(<\/span>"Received:"<\/span>,<\/span> text)<\/span>
\n_<\/span>,<\/span> err :=<\/span> conn.<\/span>Write<\/span>(<\/span>[<\/span>]<\/span>byte<\/span>(<\/span>text +<\/span> "\\\\n"<\/span>)<\/span>)<\/span>
\nif<\/span> err !=<\/span> nil<\/span> {<\/span>
\nfmt.<\/span>Println<\/span>(<\/span>"Error writing to socket:"<\/span>,<\/span> err)<\/span>
\nbreak<\/span>
\n}<\/span>
\n}<\/span><\/p>\n

if<\/span> err :=<\/span> scanner.<\/span>Err<\/span>(<\/span>)<\/span>;<\/span> err !=<\/span> nil<\/span> {<\/span>
\nfmt.<\/span>Println<\/span>(<\/span>"Error reading from socket:"<\/span>,<\/span> err)<\/span>
\n}<\/span>
\n}<\/span><\/p>\n

func<\/span> main<\/span>(<\/span>)<\/span> {<\/span>
\nport :=<\/span> "8080"<\/span>
\nlistener,<\/span> err :=<\/span> net.<\/span>Listen<\/span>(<\/span>"tcp"<\/span>,<\/span> "127.0.0.1:"<\/span>+<\/span>port)<\/span>
\nif<\/span> err !=<\/span> nil<\/span> {<\/span>
\nfmt.<\/span>Println<\/span>(<\/span>"Error listening:"<\/span>,<\/span> err.<\/span>Error<\/span>(<\/span>)<\/span>)<\/span>
\nos.<\/span>Exit<\/span>(<\/span>1<\/span>)<\/span>
\n}<\/span>
\ndefer<\/span> listener.<\/span>Close<\/span>(<\/span>)<\/span>
\nfmt.<\/span>Println<\/span>(<\/span>"Listening on:"<\/span> +<\/span> port)<\/span><\/p>\n

for<\/span> {<\/span>
\nconn,<\/span> err :=<\/span> listener.<\/span>Accept<\/span>(<\/span>)<\/span>
\nif<\/span> err !=<\/span> nil<\/span> {<\/span>
\nfmt.<\/span>Println<\/span>(<\/span>"Error accepting:"<\/span>,<\/span> err.<\/span>Error<\/span>(<\/span>)<\/span>)<\/span>
\ncontinue<\/span>
\n}<\/span>
\ngo<\/span> handleConnection<\/span>(<\/span>conn)<\/span>
\n}<\/span>
\n}<\/span><\/p>\n

\u8fd0\u884c\u8fd9\u6bb5\u4ee3\u7801：<\/p>\n

$ go run echo.go
\nListening on:8080<\/p>\n

\u5148\u5728\u672c\u673a\u4f7f\u7528 telnet \u6d4b\u8bd5\u80fd\u5426\u8bbf\u95ee：<\/p>\n

$ telnet 127.0<\/span>.0.1 8080<\/span>
\nTrying 127.0<\/span>.0.1..<\/span>.
\nConnected to 127.0<\/span>.0.1.
\nEscape character is '^]'<\/span>.<\/span>
\nhello
\nhello<\/p>\n

\u6b64\u65f6\u4e00\u5207\u6b63\u5e38，\u670d\u52a1\u5668\u53ef\u4ee5\u6b63\u5e38\u54cd\u5e94\u3002<\/p>\n

\u518d\u6362\u53e6\u4e00\u53f0\u8ba1\u7b97\u673a\u6d4b\u8bd5：<\/p>\n

$ telnet 47.100<\/span>.200.202 8080<\/span>
\nTrying 47.100<\/span>.200.202..<\/span>.
\ntelnet: Unable to connect to remote host: Connection refused<\/p>\n

\u76f4\u63a5\u62a5\u9519，\u4e0d\u80fd\u8bbf\u95ee\u3002<\/p>\n

\u8fd9\u91cc\u8bbf\u95ee\u7684 47.100.200.202 \u662f\u670d\u52a1\u5668\u7684\u516c\u7f51 IP，\u4e0a\u9762\u7684 172.30.36.166 \u662f\u5185\u7f51 IP\u3002<\/p>\n

\u7ed1\u5b9a 0.0.0.0<\/h2>\n

\u5c06 127.0.0.1 \u4fee\u6539\u4e3a 0.0.0.0 \u540e\u91cd\u65b0\u8fd0\u884c\u3002<\/p>\n

listener,<\/span> err :=<\/span> net.<\/span>Listen<\/span>(<\/span>"tcp"<\/span>,<\/span> "0.0.0.0:"<\/span>+<\/span>port)<\/span><\/p>\n

\u8fd8\u662f\u5148\u5728\u672c\u673a\u6d4b\u8bd5：<\/p>\n

$ telnet 127.0<\/span>.0.1 8080<\/span>
\nTrying 127.0<\/span>.0.1..<\/span>.
\nConnected to 127.0<\/span>.0.1.
\nEscape character is '^]'<\/span>.<\/span>
\nhi
\nhi<\/p>\n

\u8fd8\u662f\u53ef\u4ee5\u6b63\u5e38\u8bbf\u95ee，\u6ca1\u6709\u95ee\u9898\u3002<\/p>\n

\u518d\u6362\u5230\u53e6\u4e00\u53f0\u8ba1\u7b97\u673a\u6d4b\u8bd5：<\/p>\n

$ telnet 47.100<\/span>.200.202 8080<\/span>
\nTrying 47.100<\/span>.200.202..<\/span>.
\nConnected to 47.100<\/span>.200.202.
\nEscape character is '^]'<\/span>.<\/span>
\nhello hi
\nhello hi<\/p>\n

\u8fd9\u65f6\u5c31\u53ef\u4ee5\u6b63\u5e38\u8bbf\u95ee\u4e86\u3002<\/p>\n

\u53c2\u8003\u8d44\u6599<\/h2>\n