{"id":476912,"date":"2023-08-09T09:05:02","date_gmt":"2023-08-09T09:05:02","guid":{"rendered":""},"modified":"2023-09-05T11:13:39","modified_gmt":"2023-09-05T11:13:39","slug":"dns-port","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/cn\/wiki\/dns-port\/","title":{"rendered":"DNS\u7aef\u53e3"},"content":{"rendered":"<p>\u57df\u540d\u7cfb\u7edf (DNS) \u662f\u4e92\u8054\u7f51\u7684\u91cd\u8981\u7ec4\u6210\u90e8\u5206\uff0c\u5b83\u5c06\u4eba\u7c7b\u53ef\u8bfb\u7684\u57df\u540d\u8f6c\u6362\u4e3a IP \u5730\u5740\uff0c\u4f7f\u8bbe\u5907\u80fd\u591f\u76f8\u4e92\u5b9a\u4f4d\u548c\u901a\u4fe1\u3002 DNS \u4f7f\u7528\u5404\u79cd\u7aef\u53e3\u8fdb\u884c\u64cd\u4f5c\uff0c\u5176\u4e2d\u6700\u91cd\u8981\u7684\u7aef\u53e3\u4e4b\u4e00\u662f DNS \u7aef\u53e3\u3002\u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u5c06\u6df1\u5165\u63a2\u8ba8 DNS \u7aef\u53e3\u7684\u5386\u53f2\u3001\u7ed3\u6784\u3001\u7c7b\u578b\u3001\u7528\u9014\u548c\u672a\u6765\u524d\u666f\uff0c\u7279\u522b\u662f\u4e0e\u4ee3\u7406\u670d\u52a1\u5668\u76f8\u5173\u7684\u90e8\u5206\u3002<\/p>\n<h2>DNS\u7aef\u53e3\u7684\u8d77\u6e90\u548c\u9996\u6b21\u63d0\u53ca\u7684\u5386\u53f2<\/h2>\n<p>DNS \u534f\u8bae\u4e8e 1983 \u5e74\u9996\u6b21\u63a8\u51fa\uff0c\u4f46\u968f\u540e\u4e8e 1983 \u5e74 11 \u6708\u5728 RFC 883 \u4e2d\u5b9a\u4e49\u4e86 DNS \u7aef\u53e3\u53f7\uff08UDP \u7aef\u53e3 53\uff09\u7684\u89c4\u8303\u3002\u8be5\u7aef\u53e3\u53f7\u88ab\u5206\u914d\u7ed9 DNS \u7528\u4e8e UDP \u548c TCP \u4f20\u8f93\u534f\u8bae\uff0c\u5141\u8bb8 DNS \u67e5\u8be2\u4ee5\u53ca\u901a\u8fc7\u7f51\u7edc\u4ea4\u6362\u7684\u54cd\u5e94\u3002<\/p>\n<h2>\u6709\u5173 DNS \u7aef\u53e3\u7684\u8be6\u7ec6\u4fe1\u606f\u3002\u6269\u5c55\u4e3b\u9898 DNS \u7aef\u53e3\u3002<\/h2>\n<p>DNS \u7aef\u53e3\u4f7f\u7528\u4e24\u79cd\u4f20\u8f93\u534f\u8bae\u8fdb\u884c\u64cd\u4f5c\uff1aUDP\uff08\u7528\u6237\u6570\u636e\u62a5\u534f\u8bae\uff09\u548c TCP\uff08\u4f20\u8f93\u63a7\u5236\u534f\u8bae\uff09\u3002 UDP \u662f DNS \u67e5\u8be2\u7684\u9ed8\u8ba4\u4e14\u6700\u5e38\u7528\u7684\u534f\u8bae\uff0c\u7531\u4e8e\u5176\u65e0\u8fde\u63a5\u7279\u6027\uff0c\u53ef\u4ee5\u63d0\u4f9b\u66f4\u5feb\u7684\u901a\u4fe1\u3002\u53e6\u4e00\u65b9\u9762\uff0cTCP \u7528\u4e8e\u8d85\u51fa UDP \u6570\u636e\u5305\u6700\u5927\u5927\u5c0f\u7684\u5927\u578b DNS \u54cd\u5e94\u6216\u9700\u8981\u533a\u57df\u4f20\u8f93\u64cd\u4f5c\u65f6\u3002<\/p>\n<h2>DNS\u7aef\u53e3\u7684\u5185\u90e8\u7ed3\u6784\u3002 DNS \u7aef\u53e3\u5982\u4f55\u5de5\u4f5c\u3002<\/h2>\n<p>DNS \u7aef\u53e3\u5728 OSI \u6a21\u578b\u7684\u4f20\u8f93\u5c42\u8fd0\u884c\uff0c\u4fc3\u8fdb\u5e94\u7528\u5c42\uff08DNS \u8fd0\u884c\u7684\u5730\u65b9\uff09\u548c\u5e95\u5c42\u7f51\u7edc\u5c42\u4e4b\u95f4\u7684\u901a\u4fe1\u3002\u5f53 DNS \u5ba2\u6237\u7aef\u5411 DNS \u670d\u52a1\u5668\u53d1\u9001\u67e5\u8be2\u65f6\uff0c\u5b83\u4f7f\u7528\u7aef\u53e3 53 \u4f5c\u4e3a UDP \u548c TCP \u534f\u8bae\u7684\u76ee\u6807\u7aef\u53e3\u3002 DNS \u670d\u52a1\u5668\u53c8\u4f7f\u7528\u6e90\u7aef\u53e3 53 \u5411\u5ba2\u6237\u7aef\u505a\u51fa\u54cd\u5e94\u3002<\/p>\n<p>\u4e0b\u9762\u662f DNS \u67e5\u8be2\u8fc7\u7a0b\u7684\u7b80\u5316\u6982\u8981\uff1a<\/p>\n<ol>\n<li>DNS \u5ba2\u6237\u7aef\u901a\u8fc7\u7aef\u53e3 53\uff08UDP \u6216 TCP\uff09\u5411 DNS \u670d\u52a1\u5668\u53d1\u9001\u67e5\u8be2\u3002<\/li>\n<li>DNS \u670d\u52a1\u5668\u5904\u7406\u67e5\u8be2\u5e76\u7528\u8bf7\u6c42\u7684\u4fe1\u606f\u8fdb\u884c\u54cd\u5e94\u3002<\/li>\n<li>DNS \u5ba2\u6237\u7aef\u5728\u7aef\u53e3 53 \u4e0a\u63a5\u6536\u54cd\u5e94\u3002<\/li>\n<\/ol>\n<h2>DNS\u7aef\u53e3\u5173\u952e\u7279\u6027\u5206\u6790\u3002<\/h2>\n<p>DNS \u7aef\u53e3\u7684\u4e3b\u8981\u529f\u80fd\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u7aef\u53e3\u53f7<\/strong>\uff1aDNS \u5bf9 UDP \u548c TCP \u534f\u8bae\u90fd\u4f7f\u7528\u7aef\u53e3 53\u3002<\/li>\n<li><strong>\u4f20\u8f93\u534f\u8bae<\/strong>\uff1a\u5b83\u652f\u6301\u901a\u8fc7 UDP \u8fdb\u884c\u901a\u4fe1\u4ee5\u5b9e\u73b0\u66f4\u5feb\u7684\u67e5\u8be2\uff0c\u5e76\u652f\u6301\u901a\u8fc7 TCP \u8fdb\u884c\u5927\u578b\u54cd\u5e94\u6216\u533a\u57df\u4f20\u8f93\u3002<\/li>\n<li><strong>\u53ef\u9760\u6027<\/strong>\uff1a\u867d\u7136UDP\u901f\u5ea6\u66f4\u5feb\uff0c\u4f46\u5b83\u7f3a\u4e4f\u9519\u8bef\u68c0\u67e5\u673a\u5236\uff0c\u800cTCP\u5219\u786e\u4fdd\u53ef\u9760\u7684\u6570\u636e\u4f20\u8f93\u3002<\/li>\n<\/ul>\n<h2>DNS \u7aef\u53e3\u7c7b\u578b<\/h2>\n<p>DNS \u7aef\u53e3\u53ea\u6709\u4e00\u4e2a\uff0c\u5373\u7aef\u53e3\u53f7 53\u3002\u4f46\u6839\u636e\u4f20\u8f93\u534f\u8bae\u7684\u4e0d\u540c\uff0c\u5176\u7528\u9014\u53ef\u5206\u4e3a\u4e24\u79cd\uff1a<\/p>\n<ol>\n<li>\n<p><strong>DNS UDP \u7aef\u53e3 (UDP\/53)<\/strong>\uff1a\u8fd9\u662f DNS \u67e5\u8be2\u7684\u9ed8\u8ba4\u4e14\u4e3b\u8981\u7684\u901a\u4fe1\u6a21\u5f0f\u3002\u5b83\u901f\u5ea6\u66f4\u5feb\uff0c\u4f46\u4e0d\u80fd\u4fdd\u8bc1\u53ef\u9760\u7684\u6570\u636e\u4f20\u8f93\u3002<\/p>\n<\/li>\n<li>\n<p><strong>DNS TCP \u7aef\u53e3 (TCP\/53)<\/strong>\uff1a\u5f53\u54cd\u5e94\u6570\u636e\u8d85\u8fc7 UDP \u6570\u636e\u5305\u7684\u6700\u5927\u9650\u5236\u6216\u6267\u884c\u533a\u57df\u4f20\u8f93\u65f6\uff0c\u4f7f\u7528 TCP\u3002<\/p>\n<\/li>\n<\/ol>\n<p>\u8ba9\u6211\u4eec\u603b\u7ed3\u4e00\u4e0b\u8868\u4e2d\u7684\u7c7b\u578b\uff1a<\/p>\n<table>\n<thead>\n<tr>\n<th>\u7c7b\u578b<\/th>\n<th>\u534f\u8bae<\/th>\n<th>\u7528\u6cd5<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>DNS UDP \u7aef\u53e3<\/td>\n<td>UDP\u534f\u8bae<\/td>\n<td>DNS \u67e5\u8be2\u7684\u9ed8\u8ba4\u503c\uff1b\u5feb\u70b9\u3002<\/td>\n<\/tr>\n<tr>\n<td>DNS TCP \u7aef\u53e3<\/td>\n<td>\u4f20\u8f93\u63a7\u5236\u534f\u8bae<\/td>\n<td>\u7528\u4e8e\u5927\u91cf\u54cd\u5e94\u6216\u4f20\u8f93\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>DNS\u7aef\u53e3\u7684\u4f7f\u7528\u65b9\u6cd5\u3001\u4f7f\u7528\u8fc7\u7a0b\u4e2d\u51fa\u73b0\u7684\u95ee\u9898\u53ca\u89e3\u51b3\u65b9\u6cd5<\/h2>\n<h3>DNS\u7aef\u53e3\u7684\u4f7f\u7528\u65b9\u6cd5<\/h3>\n<p>DNS\u7aef\u53e3\u4e3b\u8981\u7528\u4e8e\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u4e4b\u95f4\u7684DNS\u67e5\u8be2\u548c\u54cd\u5e94\u64cd\u4f5c\u3002\u5b83\u662f\u4e92\u8054\u7f51\u57fa\u7840\u8bbe\u65bd\u7684\u91cd\u8981\u7ec4\u6210\u90e8\u5206\uff0c\u80fd\u591f\u5c06\u57df\u540d\u89e3\u6790\u4e3a IP \u5730\u5740\u3002<\/p>\n<h3>\u4f7f\u7528\u8fc7\u7a0b\u4e2d\u51fa\u73b0\u7684\u95ee\u9898\u53ca\u89e3\u51b3\u65b9\u6cd5<\/h3>\n<ol>\n<li>\n<p><strong>DNS \u653b\u51fb<\/strong>\uff1aDNS \u5bb9\u6613\u53d7\u5230\u5404\u79cd\u653b\u51fb\uff0c\u4f8b\u5982 DNS \u6b3a\u9a97\u3001DDoS \u653b\u51fb\u548c\u7f13\u5b58\u4e2d\u6bd2\u3002\u5b9e\u65bd DNSSEC\uff08DNS \u5b89\u5168\u6269\u5c55\uff09\u53ef\u4ee5\u5e2e\u52a9\u51cf\u8f7b\u8fd9\u4e9b\u5b89\u5168\u98ce\u9669\u3002<\/p>\n<\/li>\n<li>\n<p><strong>DNS \u8fc7\u8f7d<\/strong>\uff1a\u9ad8 DNS \u67e5\u8be2\u7387\u6216\u5927\u91cf DNS \u54cd\u5e94\u53ef\u80fd\u4f1a\u4f7f DNS \u670d\u52a1\u5668\u8fc7\u8f7d\u3002\u8d1f\u8f7d\u5e73\u8861\u548c\u90e8\u7f72\u66f4\u591a\u670d\u52a1\u5668\u53ef\u4ee5\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n<\/li>\n<li>\n<p><strong>DNS \u89e3\u6790\u5ef6\u8fdf<\/strong>\uff1aDNS \u54cd\u5e94\u7f13\u6162\u4f1a\u5f71\u54cd\u7f51\u7ad9\u52a0\u8f7d\u65f6\u95f4\u3002\u5728\u672c\u5730\u7f13\u5b58 DNS \u8bb0\u5f55\u5e76\u4f7f\u7528\u66f4\u5feb\u7684 DNS \u670d\u52a1\u5668\u53ef\u4ee5\u7f29\u77ed\u89e3\u6790\u65f6\u95f4\u3002<\/p>\n<\/li>\n<\/ol>\n<h2>\u4ee5\u8868\u683c\u548c\u5217\u8868\u7684\u5f62\u5f0f\u5217\u51fa\u4e3b\u8981\u7279\u5f81\u4ee5\u53ca\u4e0e\u7c7b\u4f3c\u672f\u8bed\u7684\u5176\u4ed6\u6bd4\u8f83\u3002<\/h2>\n<p>\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u5c06 DNS \u7aef\u53e3\u4e0e\u5176\u4ed6\u76f8\u5173\u672f\u8bed\u8fdb\u884c\u6bd4\u8f83\uff1a<\/p>\n<table>\n<thead>\n<tr>\n<th>\u5b66\u671f<\/th>\n<th>\u63cf\u8ff0<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>DNS \u7aef\u53e3 (UDP\/53)<\/td>\n<td>DNS \u67e5\u8be2\u548c\u54cd\u5e94\u7684\u6307\u5b9a\u7aef\u53e3\u3002<\/td>\n<\/tr>\n<tr>\n<td>HTTP \u7aef\u53e3 (TCP\/80)<\/td>\n<td>\u7528\u4e8e\u6807\u51c6\u672a\u52a0\u5bc6 HTTP Web \u6d41\u91cf\u7684\u7aef\u53e3\u3002<\/td>\n<\/tr>\n<tr>\n<td>HTTPS \u7aef\u53e3 (TCP\/443)<\/td>\n<td>\u7528\u4e8e\u4f7f\u7528 SSL\/TLS \u4fdd\u62a4 HTTP \u6d41\u91cf\u7684\u7aef\u53e3\u3002<\/td>\n<\/tr>\n<tr>\n<td>FTP \u7aef\u53e3 (TCP\/21)<\/td>\n<td>\u7528\u4e8e FTP\uff08\u6587\u4ef6\u4f20\u8f93\u534f\u8bae\uff09\u64cd\u4f5c\u7684\u7aef\u53e3\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u4e0e DNS \u7aef\u53e3\u76f8\u5173\u7684\u672a\u6765\u524d\u666f\u548c\u6280\u672f\u3002<\/h2>\n<p>\u968f\u7740\u4e92\u8054\u7f51\u7684\u4e0d\u65ad\u53d1\u5c55\uff0cDNS \u534f\u8bae\u53ca\u5176\u76f8\u5173\u7aef\u53e3\u53ef\u80fd\u4f1a\u53d6\u5f97\u8fdb\u6b65\u548c\u6539\u8fdb\u3002\u4e00\u4e9b\u6f5c\u5728\u7684\u672a\u6765\u53d1\u5c55\u5305\u62ec\uff1a<\/p>\n<ol>\n<li>\n<p><strong>IPv6 \u91c7\u7528<\/strong>\uff1a\u968f\u7740 IPv4 \u5730\u5740\u7684\u8017\u5c3d\uff0c\u5411 IPv6 \u7684\u8fc7\u6e21\u5c06\u53d8\u5f97\u66f4\u52a0\u666e\u904d\u3002 DNS \u9700\u8981\u652f\u6301 IPv6 \u8bb0\u5f55\u548c AAAA \u67e5\u8be2\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u57fa\u4e8e HTTPS \u7684 DNS (DoH)<\/strong>\uff1aDNS over HTTPS \u5bf9 DNS \u6d41\u91cf\u8fdb\u884c\u52a0\u5bc6\uff0c\u589e\u5f3a\u9690\u79c1\u6027\u548c\u5b89\u5168\u6027\u3002\u5b83\u53ef\u80fd\u4f1a\u83b7\u5f97\u66f4\u5e7f\u6cdb\u7684\u91c7\u7528\uff0c\u4ece\u800c\u5bfc\u81f4 DNS \u901a\u4fe1\u6a21\u5f0f\u7684\u53d8\u5316\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u57fa\u4e8e\u533a\u5757\u94fe\u7684 DNS<\/strong>\uff1a\u5229\u7528\u533a\u5757\u94fe\u6280\u672f\u8fdb\u884c DNS \u7ba1\u7406\u53ef\u4ee5\u5f15\u5165\u53bb\u4e2d\u5fc3\u5316\u4e14\u9632\u7be1\u6539\u7684 DNS \u7cfb\u7edf\u3002<\/p>\n<\/li>\n<\/ol>\n<h2>\u5982\u4f55\u4f7f\u7528\u4ee3\u7406\u670d\u52a1\u5668\u6216\u5982\u4f55\u5c06\u4ee3\u7406\u670d\u52a1\u5668\u4e0e DNS \u7aef\u53e3\u5173\u8054\u3002<\/h2>\n<p>\u4ee3\u7406\u670d\u52a1\u5668\u5728\u7ba1\u7406\u548c\u4f18\u5316 DNS \u76f8\u5173\u6d3b\u52a8\u65b9\u9762\u53d1\u6325\u7740\u91cd\u8981\u4f5c\u7528\u3002\u5b83\u4eec\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u4e0e DNS \u7aef\u53e3\u5173\u8054\uff1a<\/p>\n<ol>\n<li>\n<p><strong>DNS\u4ee3\u7406<\/strong>\uff1a\u67d0\u4e9b\u4ee3\u7406\u670d\u52a1\u5668\u5145\u5f53 DNS \u4ee3\u7406\uff0c\u4ee3\u8868\u5ba2\u6237\u7aef\u5904\u7406 DNS \u67e5\u8be2\u3002\u8fd9\u6709\u52a9\u4e8e\u63d0\u9ad8\u5b89\u5168\u6027\u3001\u6027\u80fd\u548c\u8fc7\u6ee4\u529f\u80fd\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u8d1f\u8f7d\u5747\u8861<\/strong>\uff1a\u4ee3\u7406\u670d\u52a1\u5668\u53ef\u4ee5\u8de8\u591a\u4e2a DNS \u670d\u52a1\u5668\u5206\u53d1 DNS \u67e5\u8be2\uff0c\u6709\u52a9\u4e8e\u8d1f\u8f7d\u5e73\u8861\u5e76\u786e\u4fdd\u9ad8\u53ef\u7528\u6027\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u7f13\u5b58<\/strong>\uff1a\u4ee3\u7406\u670d\u52a1\u5668\u53ef\u4ee5\u7f13\u5b58 DNS \u54cd\u5e94\uff0c\u51cf\u5c11\u89e3\u6790\u65f6\u95f4\u5e76\u51cf\u8f7b DNS \u57fa\u7840\u8bbe\u65bd\u7684\u8d1f\u62c5\u3002<\/p>\n<\/li>\n<\/ol>\n<h2>\u76f8\u5173\u94fe\u63a5<\/h2>\n<p>\u6709\u5173 DNS 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It allows devices to translate human-readable domain names into IP addresses and vice versa. DNS operates using two transport protocols: UDP for faster queries and TCP for large responses or zone transfers.<\/p>"},{"question":"How was the DNS port established, and when was it first defined?","answer":"<p>The DNS protocol was introduced in 1983, and the specification for the DNS port number (UDP port 53) was defined in RFC 883 in November 1983. This assignment ensured that DNS queries and responses could be efficiently exchanged over the network.<\/p>"},{"question":"What are the main features of the DNS port?","answer":"<p>The DNS port (UDP\/53) supports both UDP and TCP transport protocols. UDP is faster but lacks error-checking, while TCP ensures reliable data transmission. The DNS port operates at the transport layer of the OSI model, facilitating communication between the application layer (DNS) and the network layer.<\/p>"},{"question":"Are there different types of DNS ports?","answer":"<p>The DNS port itself is singular (UDP port 53), but its usage can be categorized into two types:<\/p><ol><li>DNS UDP Port (UDP\/53): The default and primary mode for faster DNS queries.<\/li><li>DNS TCP Port (TCP\/53): Used for large responses or zone transfers.<\/li><\/ol>"},{"question":"What are some common issues related to the DNS port's usage?","answer":"<p>Common issues include DNS attacks (e.g., spoofing, DDoS) that can be mitigated with DNSSEC, DNS overload, and resolution delays. Solutions involve load balancing, deploying more servers, and caching DNS records locally.<\/p>"},{"question":"How is the DNS port associated with proxy servers?","answer":"<p>Proxy servers can act as DNS proxies, handling DNS queries on behalf of clients, improving security, performance, and filtering capabilities. They can also perform load balancing, distribute DNS queries, and cache DNS responses to enhance efficiency.<\/p>"},{"question":"What are the future perspectives and technologies related to the DNS port?","answer":"<p>The future of DNS port may involve support for IPv6 records, DNS over HTTPS (DoH) adoption, and exploring blockchain-based DNS systems for decentralization and security enhancements.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/wiki\/476912","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/wiki\/476912\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/media\/476913"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/media?parent=476912"}],"curies":[{"name":"\u53ef\u6e7f\u6027\u7c89\u5242","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}