{"id":1368,"date":"2026-04-14T10:18:07","date_gmt":"2026-04-14T02:18:07","guid":{"rendered":"https:\/\/www.ygcloud.com\/knowledge\/?p=1368"},"modified":"2026-07-24T18:30:52","modified_gmt":"2026-07-24T10:30:52","slug":"%e4%b9%b0%e4%ba%86%e6%9c%8d%e5%8a%a1%e5%99%a8%e7%ab%af%e5%8f%a3%e4%b8%8d%e9%80%9a%ef%bc%9f90%e6%98%af%e5%ae%89%e5%85%a8%e7%bb%84%e6%b2%a1%e5%bc%80%ef%bc%8c3%e5%88%86%e9%92%9f%e6%90%9e%e5%ae%9a","status":"publish","type":"post","link":"https:\/\/www.ygcloud.com\/knowledge\/1368\/","title":{"rendered":"\u670d\u52a1\u5668\u7aef\u53e3\u4e0d\u901a\u600e\u4e48\u529e\uff1f\u5b89\u5168\u7ec4\u3001\u9632\u706b\u5899\u4e0e\u76d1\u542c\u6392\u67e5"},"content":{"rendered":"<section data-seo-update=\"20260724-1368\">\n<p><strong>\u5148\u8bf4\u7ed3\u8bba\uff1a<\/strong>\u670d\u52a1\u5668\u7aef\u53e3\u4e0d\u901a\uff0c\u8981\u6cbf\u6570\u636e\u8def\u5f84\u9010\u5c42\u68c0\u67e5\uff1a\u5ba2\u6237\u7aef\u4e0e DNS \u2192 \u516c\u7f51 IP\/\u8def\u7531 \u2192 \u4e91\u5b89\u5168\u7ec4 \u2192 \u7cfb\u7edf\u9632\u706b\u5899 \u2192 \u8fdb\u7a0b\u76d1\u542c \u2192 \u5bb9\u5668\u6216\u53cd\u5411\u4ee3\u7406 \u2192 \u5e94\u7528\u534f\u8bae\u3002\u4e0d\u8981\u5148\u628a\u6765\u6e90\u6539\u6210 <code>0.0.0.0\/0<\/code>\u3001\u5173\u95ed\u9632\u706b\u5899\u6216\u91cd\u88c5\u7cfb\u7edf\uff1b\u8fd9\u4e9b\u64cd\u4f5c\u65e2\u6269\u5927\u98ce\u9669\uff0c\u4e5f\u4f1a\u7834\u574f\u5b9a\u4f4d\u8bc1\u636e\u3002<\/p>\n<figure>\n<img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-1369\" src=\"https:\/\/www.ygcloud.com\/knowledge\/wp-content\/uploads\/2026\/04\/603860e074ea3d1.jpg\" alt=\"\u670d\u52a1\u5668\u7aef\u53e3\u4e0d\u901a\u5206\u5c42\u6392\u67e5\u8def\u5f84\" width=\"600\" height=\"448\" srcset=\"https:\/\/www.ygcloud.com\/knowledge\/wp-content\/uploads\/2026\/04\/603860e074ea3d1.jpg 1024w, https:\/\/www.ygcloud.com\/knowledge\/wp-content\/uploads\/2026\/04\/603860e074ea3d1-300x224.jpg 300w, https:\/\/www.ygcloud.com\/knowledge\/wp-content\/uploads\/2026\/04\/603860e074ea3d1-768x574.jpg 768w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><figcaption>\u6bcf\u4e00\u5c42\u90fd\u53ef\u80fd\u5141\u8bb8\u6216\u963b\u65ad\u6d41\u91cf\uff0c\u5e94\u4ece\u5916\u5230\u5185\u9a8c\u8bc1\u5e76\u4fdd\u7559\u8bc1\u636e\u3002<\/figcaption><\/figure>\n<h2>\u5148\u533a\u5206\u56db\u79cd\u7ed3\u679c<\/h2>\n<table>\n<thead>\n<tr>\n<th>\u73b0\u8c61<\/th>\n<th>\u5e38\u89c1\u542b\u4e49<\/th>\n<th>\u4e0b\u4e00\u6b65<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u8fde\u63a5\u8d85\u65f6<\/td>\n<td>\u8bf7\u6c42\u6216\u54cd\u5e94\u88ab\u4e22\u5f03\u3001\u8def\u7531\u9519\u8bef\u3001\u5730\u5740\u9519\u8bef<\/td>\n<td>\u67e5 DNS\/IP\u3001\u7f51\u7edc\u3001\u5b89\u5168\u7ec4\u548c\u9632\u706b\u5899<\/td>\n<\/tr>\n<tr>\n<td>Connection refused<\/td>\n<td>\u76ee\u6807\u4e3b\u52a8\u62d2\u7edd\u6216\u6ca1\u6709\u8fdb\u7a0b\u76d1\u542c<\/td>\n<td>\u67e5\u76d1\u542c\u3001\u670d\u52a1\u72b6\u6001\u548c\u62d2\u7edd\u89c4\u5219<\/td>\n<\/tr>\n<tr>\n<td>TCP \u6210\u529f\u4f46\u4e1a\u52a1\u5931\u8d25<\/td>\n<td>TLS\u3001Host\u3001\u8ba4\u8bc1\u3001\u53cd\u5411\u4ee3\u7406\u6216\u5e94\u7528\u95ee\u9898<\/td>\n<td>\u7528\u771f\u5b9e\u534f\u8bae\u548c\u65e5\u5fd7\u6392\u67e5<\/td>\n<\/tr>\n<tr>\n<td>\u53ea\u6709\u90e8\u5206\u5730\u533a\u5931\u8d25<\/td>\n<td>\u6765\u6e90\u767d\u540d\u5355\u3001\u8fd0\u8425\u5546\u8def\u5f84\u3001IPv4\/IPv6 \u6216\u9632\u62a4\u7b56\u7565<\/td>\n<td>\u5206\u6765\u6e90\u3001\u5206\u5730\u5740\u65cf\u5bf9\u6bd4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><code>nc<\/code> \u663e\u793a TCP \u5efa\u8fde\u6210\u529f\uff0c\u53ea\u80fd\u8bc1\u660e\u4f20\u8f93\u5c42\u6210\u529f\uff0c\u4e0d\u80fd\u8bc1\u660e HTTPS\u3001\u6570\u636e\u5e93\u6216\u81ea\u5b9a\u4e49\u534f\u8bae\u5de5\u4f5c\u6b63\u5e38\u3002<\/p>\n<h2>\u7b2c 1 \u6b65\uff1a\u786e\u8ba4\u6d4b\u8bd5\u76ee\u6807\u6ca1\u6709\u9519<\/h2>\n<ul>\n<li>\u57df\u540d A\/AAAA \u662f\u5426\u6307\u5411\u5f53\u524d\u5b9e\u4f8b\u3001\u8d1f\u8f7d\u5747\u8861\u6216 CDN\uff1b<\/li>\n<li>\u6d4b\u8bd5\u7684\u662f\u516c\u7f51 IP \u8fd8\u662f\u53ea\u5728\u79c1\u7f51\u53ef\u8fbe\u7684\u5730\u5740\uff1b<\/li>\n<li>\u7aef\u53e3\u3001\u534f\u8bae TCP\/UDP \u548c IPv4\/IPv6 \u662f\u5426\u4e0e\u670d\u52a1\u4e00\u81f4\uff1b<\/li>\n<li>\u5b9e\u4f8b\u662f\u5426\u8fd0\u884c\uff0c\u516c\u7f51 IP\u3001\u7f51\u5361\u3001\u5b89\u5168\u7ec4\u7ed1\u5b9a\u662f\u5426\u521a\u53d1\u751f\u53d8\u5316\uff1b<\/li>\n<li>\u4e1a\u52a1\u662f\u5426\u672c\u6765\u53ea\u5141\u8bb8\u4ece VPN\u3001\u5821\u5792\u673a\u6216\u529e\u516c\u7f51\u8bbf\u95ee\u3002<\/li>\n<\/ul>\n<pre><code>dig A example.com\ndig AAAA example.com\ncurl -4 https:\/\/example.com\/\ncurl -6 https:\/\/example.com\/\n<\/code><\/pre>\n<p>\u82e5\u6574\u53f0\u5b9e\u4f8b\u591a\u79cd\u534f\u8bae\u90fd\u4e0d\u53ef\u8fbe\uff0c\u5148\u6309<a href=\"https:\/\/www.ygcloud.com\/knowledge\/143\/\">\u4e91\u670d\u52a1\u5668 IP \u8fde\u63a5\u4e0d\u4e0a\u6392\u67e5<\/a>\u5904\u7406\u3002<\/p>\n<h2>\u7b2c 2 \u6b65\uff1a\u4ece\u6b63\u786e\u7684\u5ba2\u6237\u7aef\u505a TCP \u6d4b\u8bd5<\/h2>\n<pre><code># macOS \/ Linux\nnc -vz -w 5 203.0.113.10 443\n\n# Windows PowerShell\nTest-NetConnection 203.0.113.10 -Port 443\n<\/code><\/pre>\n<p>\u7528\u4e3b\u8981\u7528\u6237\u7f51\u7edc\u3001\u53e6\u4e00\u8fd0\u8425\u5546\u548c\u53d7\u4fe1\u4efb\u8fd0\u7ef4\u7f51\u7edc\u5206\u522b\u6d4b\u8bd5\uff0c\u8bb0\u5f55\u65f6\u95f4\u3001\u6765\u6e90\u516c\u7f51 IP\u3001\u76ee\u6807\u3001\u534f\u8bae\u548c\u7ed3\u679c\u3002\u516c\u53f8\u51fa\u53e3\u53ef\u80fd\u9650\u5236\u7ba1\u7406\u7aef\u53e3\uff0c\u670d\u52a1\u5668\u4e5f\u53ef\u80fd\u53ea\u5bf9\u767d\u540d\u5355\u5f00\u653e\uff1b\u6362\u7f51\u7edc\u80fd\u5e2e\u52a9\u5b9a\u4f4d\uff0c\u4f46\u4e0d\u80fd\u8bc1\u660e\u54ea\u4e00\u5c42\u4e00\u5b9a\u6545\u969c\u3002<\/p>\n<p>UDP \u6ca1\u6709\u548c TCP \u76f8\u540c\u7684\u63e1\u624b\uff0c\u7b80\u5355 <code>nc -u<\/code> \u6ca1\u54cd\u5e94\u4e0d\u80fd\u76f4\u63a5\u8bc1\u660e UDP \u88ab\u963b\u65ad\u3002\u5e94\u4f7f\u7528\u5bf9\u5e94\u4e1a\u52a1\u534f\u8bae\u3001\u670d\u52a1\u7aef\u6293\u5305\u6216\u660e\u786e\u7684\u63a2\u6d4b\u5de5\u5177\u9a8c\u8bc1\u3002<\/p>\n<h2>\u7b2c 3 \u6b65\uff1a\u68c0\u67e5\u4e91\u5b89\u5168\u7ec4<\/h2>\n<p>\u786e\u8ba4\u89c4\u5219\u5173\u8054\u5230\u6b63\u786e\u5b9e\u4f8b\/\u7f51\u5361\uff0c\u5e76\u6838\u5bf9\uff1a<\/p>\n<ul>\n<li>\u65b9\u5411\u662f\u5165\u7ad9\u8fd8\u662f\u51fa\u7ad9\uff1b<\/li>\n<li>\u534f\u8bae\u4e0e\u7aef\u53e3\u8303\u56f4\u6b63\u786e\uff1b<\/li>\n<li>\u6765\u6e90 CIDR \u5305\u542b\u6d4b\u8bd5\u5ba2\u6237\u7aef\u5f53\u524d\u516c\u7f51 IP\uff1b<\/li>\n<li>IPv4 \u4e0e IPv6 \u89c4\u5219\u5206\u522b\u5b58\u5728\uff1b<\/li>\n<li>\u662f\u5426\u6709\u4f18\u5148\u7ea7\u66f4\u9ad8\u7684\u62d2\u7edd\u89c4\u5219\u6216\u7f51\u7edc ACL\uff1b<\/li>\n<li>\u8fd4\u56de\u6d41\u91cf\u3001\u8d1f\u8f7d\u5747\u8861\u5065\u5eb7\u68c0\u67e5\u548c\u4e0a\u6e38\u4f9d\u8d56\u662f\u5426\u5141\u8bb8\u3002<\/li>\n<\/ul>\n<p>\u7ba1\u7406\u7aef\u53e3\u3001\u6570\u636e\u5e93\u3001\u9762\u677f\u548c\u76d1\u63a7\u7aef\u53e3\u4f18\u5148\u9650\u5b9a\u4e3a\u7ba1\u7406\u5458\u5730\u5740\u3001\u5821\u5792\u673a\u3001\u79c1\u7f51\u6216\u4f01\u4e1a VPN\u3002\u7f51\u7ad9 80\/443 \u9762\u5411\u516c\u7f51\u65f6\uff0c\u4e5f\u53ea\u5f00\u653e\u5b9e\u9645\u9700\u8981\u7684\u534f\u8bae\u3002\u8be6\u89c1<a href=\"https:\/\/www.ygcloud.com\/knowledge\/1434\/\">\u5b89\u5168\u7ec4\u6700\u5c0f\u6743\u9650\u914d\u7f6e<\/a>\u3002<\/p>\n<figure>\n<img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-1593\" src=\"https:\/\/www.ygcloud.com\/knowledge\/wp-content\/uploads\/2026\/05\/9213587345b3952-1.jpg\" alt=\"\u5b89\u5168\u7ec4\u9632\u706b\u5899\u76d1\u542c\u5730\u5740\u4e0e\u5bb9\u5668\u7aef\u53e3\u6620\u5c04\" width=\"600\" height=\"335\" srcset=\"https:\/\/www.ygcloud.com\/knowledge\/wp-content\/uploads\/2026\/05\/9213587345b3952-1.jpg 1024w, https:\/\/www.ygcloud.com\/knowledge\/wp-content\/uploads\/2026\/05\/9213587345b3952-1-300x168.jpg 300w, https:\/\/www.ygcloud.com\/knowledge\/wp-content\/uploads\/2026\/05\/9213587345b3952-1-768x429.jpg 768w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><figcaption>\u5b89\u5168\u7ec4\u653e\u884c\u540e\uff0c\u8fd8\u9700\u8981\u7cfb\u7edf\u89c4\u5219\u3001\u76d1\u542c\u5730\u5740\u548c\u5e94\u7528\u6620\u5c04\u90fd\u6b63\u786e\u3002<\/figcaption><\/figure>\n<h2>\u7b2c 4 \u6b65\uff1a\u68c0\u67e5\u7cfb\u7edf\u9632\u706b\u5899<\/h2>\n<pre><code># Ubuntu \/ Debian \u5e38\u89c1\nsudo ufw status verbose\n\n# RHEL \u7cfb\u5e38\u89c1\nsudo firewall-cmd --list-all\n\n# nftables\nsudo nft list ruleset\n<\/code><\/pre>\n<p>\u4e0d\u8981\u901a\u8fc7\u505c\u6b62\u6574\u4e2a\u9632\u706b\u5899\u6765\u505a\u5e38\u89c4\u6392\u67e5\u3002\u66f4\u5b89\u5168\u7684\u65b9\u6cd5\u662f\u67e5\u770b\u89c4\u5219\u3001\u8ba1\u6570\u5668\u548c\u65e5\u5fd7\uff0c\u6dfb\u52a0\u4ec5\u5141\u8bb8\u6d4b\u8bd5\u6e90 IP \u5230\u76ee\u6807\u7aef\u53e3\u7684\u4e34\u65f6\u89c4\u5219\uff0c\u9a8c\u8bc1\u540e\u5220\u9664\u3002\u82e5\u4f7f\u7528 iptables\u3001nftables\u3001UFW \u548c firewalld \u4e2d\u591a\u4e2a\u7ba1\u7406\u5c42\uff0c\u8fd8\u8981\u786e\u8ba4\u5b83\u4eec\u662f\u5426\u751f\u6210\u51b2\u7a81\u89c4\u5219\u3002<\/p>\n<h2>\u7b2c 5 \u6b65\uff1a\u786e\u8ba4\u8fdb\u7a0b\u771f\u7684\u5728\u76d1\u542c<\/h2>\n<pre><code>sudo ss -lntup\nsudo systemctl status nginx\nsudo journalctl -u nginx --since \"30 minutes ago\"\n<\/code><\/pre>\n<p>\u91cd\u70b9\u770b\u672c\u5730\u5730\u5740\uff1a<\/p>\n<ul>\n<li><code>127.0.0.1:8080<\/code>\u53ea\u63a5\u53d7\u672c\u673a\u8bbf\u95ee\uff0c\u9002\u5408\u4f5c\u4e3a\u53cd\u5411\u4ee3\u7406\u4e0a\u6e38\uff1b<\/li>\n<li><code>0.0.0.0:8080<\/code>\u76d1\u542c\u6240\u6709 IPv4 \u7f51\u5361\uff0c\u4e0d\u4ee3\u8868\u9632\u706b\u5899\u5df2\u7ecf\u5141\u8bb8\uff1b<\/li>\n<li><code>[::]:8080<\/code>\u662f\u5426\u540c\u65f6\u63a5\u53d7 IPv4 \u53d6\u51b3\u4e8e\u7cfb\u7edf\u914d\u7f6e\uff0c\u9700\u5206\u522b\u6d4b\u8bd5\uff1b<\/li>\n<li>\u6ca1\u6709\u76d1\u542c\u8bb0\u5f55\u65f6\uff0c\u5e94\u68c0\u67e5\u670d\u52a1\u542f\u52a8\u3001\u914d\u7f6e\u8bed\u6cd5\u3001\u7aef\u53e3\u51b2\u7a81\u548c\u5e94\u7528\u65e5\u5fd7\u3002<\/li>\n<\/ul>\n<p>\u4e0d\u8981\u4e3a\u4e86\u5916\u90e8\u8bbf\u95ee\u76f4\u63a5\u628a\u6570\u636e\u5e93\u6539\u6210\u76d1\u542c\u6240\u6709\u7f51\u5361\u3002\u6570\u636e\u5e93\u4f18\u5148\u901a\u8fc7\u79c1\u7f51\u3001SSH \u8df3\u677f\u3001VPN \u6216\u53d7\u63a7\u4ee3\u7406\u8bbf\u95ee\uff0c\u5e76\u4fdd\u7559\u8ba4\u8bc1\u4e0e TLS\u3002<\/p>\n<h2>\u7b2c 6 \u6b65\uff1a\u5bb9\u5668\u7aef\u53e3\u600e\u6837\u6392\u67e5\uff1f<\/h2>\n<pre><code>docker ps --format 'table {{.Names}}\\t{{.Ports}}'\ndocker inspect CONTAINER_NAME\ndocker logs --tail 100 CONTAINER_NAME\n<\/code><\/pre>\n<p>\u5bb9\u5668\u5185\u5e94\u7528\u76d1\u542c\u3001\u5bb9\u5668\u7aef\u53e3\u3001\u5bbf\u4e3b\u673a\u53d1\u5e03\u7aef\u53e3\u548c\u9632\u706b\u5899\u662f\u4e0d\u540c\u5c42\u3002<a href=\"https:\/\/docs.docker.com\/engine\/network\/port-publishing\/\">Docker \u5b98\u65b9\u7aef\u53e3\u53d1\u5e03\u6587\u6863<\/a>\u63d0\u9192\uff0c\u672a\u6307\u5b9a\u4e3b\u673a\u5730\u5740\u65f6\uff0c\u53d1\u5e03\u7aef\u53e3\u9ed8\u8ba4\u53ef\u80fd\u5bf9\u6240\u6709\u4e3b\u673a\u5730\u5740\u53ef\u7528\u3002\u53ea\u9700\u672c\u673a\u53cd\u5411\u4ee3\u7406\u8bbf\u95ee\u65f6\uff0c\u5e94\u663e\u5f0f\u7ed1\u5b9a\u56de\u73af\u5730\u5740\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre><code>docker run -p 127.0.0.1:8080:80 IMAGE\n<\/code><\/pre>\n<p>\u5982\u679c\u786e\u5b9e\u9700\u8981\u516c\u7f51\u8bbf\u95ee\uff0c\u518d\u901a\u8fc7\u5b89\u5168\u7ec4\u3001\u4e3b\u673a\u9632\u706b\u5899\u3001\u8ba4\u8bc1\u548c TLS \u9650\u5236\u66b4\u9732\u9762\u3002Docker Compose\u3001Kubernetes Service\/Ingress \u8fd8\u5e94\u5206\u522b\u68c0\u67e5\u6620\u5c04\u3001\u9009\u62e9\u5668\u3001\u5065\u5eb7\u72b6\u6001\u548c\u7f51\u7edc\u7b56\u7565\u3002<\/p>\n<h2>\u7b2c 7 \u6b65\uff1aTCP \u901a\u4f46\u7f51\u9875\u6216 API \u4e0d\u901a<\/h2>\n<p>\u4f7f\u7528\u771f\u5b9e\u534f\u8bae\u68c0\u67e5\uff0c\u4e0d\u8981\u53ea\u6d4b\u7aef\u53e3\uff1a<\/p>\n<pre><code>curl -vk --connect-timeout 5 https:\/\/example.com\/\nopenssl s_client -connect example.com:443 -servername example.com &lt;\/dev\/null\n<\/code><\/pre>\n<p>\u5e38\u89c1\u539f\u56e0\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>Nginx\/Apache \u7684 Host\u3001SNI\u3001\u865a\u62df\u4e3b\u673a\u6216\u8bc1\u4e66\u914d\u7f6e\u4e0d\u5339\u914d\uff1b<\/li>\n<li>\u53cd\u5411\u4ee3\u7406 upstream \u5730\u5740\u3001\u7aef\u53e3\u3001\u8d85\u65f6\u6216\u5065\u5eb7\u68c0\u67e5\u9519\u8bef\uff1b<\/li>\n<li>\u5e94\u7528\u8fd4\u56de 401\/403\/5xx\uff0c\u800c\u4e0d\u662f\u7f51\u7edc\u7aef\u53e3\u95ee\u9898\uff1b<\/li>\n<li>CDN\/WAF \u53ea\u5141\u8bb8\u7279\u5b9a\u6e90\u7ad9\u7aef\u53e3\u6216\u963b\u65ad\u6d4b\u8bd5\u6765\u6e90\uff1b<\/li>\n<li>WebSocket\u3001gRPC\u3001\u56de\u8c03\u7b49\u534f\u8bae\u6ca1\u6709\u5728\u4ee3\u7406\u5c42\u6b63\u786e\u4f20\u9012\uff1b<\/li>\n<li>\u5e94\u7528\u7ebf\u7a0b\u3001\u8fde\u63a5\u6c60\u3001\u6570\u636e\u5e93\u6216\u78c1\u76d8\u8017\u5c3d\u5bfc\u81f4\u8d85\u65f6\u3002<\/li>\n<\/ul>\n<p>\u57df\u540d\u548c\u7f51\u7ad9\u5c42\u95ee\u9898\u53ef\u7ee7\u7eed\u53c2\u8003<a href=\"https:\/\/www.ygcloud.com\/knowledge\/1359\/\">\u57df\u540d\u89e3\u6790\u540e\u7f51\u7ad9\u6253\u4e0d\u5f00\u6392\u67e5<\/a>\u3002<\/p>\n<h2>\u7b2c 8 \u6b65\uff1a\u5fc5\u8981\u65f6\u6293\u5305\u5b9a\u4f4d\u8fb9\u754c<\/h2>\n<p>\u5728\u786e\u8ba4\u6709\u6388\u6743\u4e14\u4e0d\u4f1a\u91c7\u96c6\u654f\u611f\u4e1a\u52a1\u6570\u636e\u7684\u524d\u63d0\u4e0b\uff0c\u53ef\u5728\u670d\u52a1\u5668\u89c2\u5bdf\u76ee\u6807\u7aef\u53e3\u662f\u5426\u6536\u5230 SYN\uff1a<\/p>\n<pre><code>sudo tcpdump -ni any 'tcp port 443'\n<\/code><\/pre>\n<ul>\n<li>\u5b8c\u5168\u770b\u4e0d\u5230\u8bf7\u6c42\uff1a\u4f18\u5148\u67e5\u76ee\u6807\u5730\u5740\u3001\u8def\u7531\u3001\u5b89\u5168\u7ec4\u3001\u4e0a\u6e38 ACL\uff1b<\/li>\n<li>\u770b\u5230 SYN \u4f46\u6ca1\u6709 SYN-ACK\uff1a\u67e5\u4e3b\u673a\u9632\u706b\u5899\u3001\u76d1\u542c\u548c\u5185\u6838\uff1b<\/li>\n<li>\u5b8c\u6210\u63e1\u624b\u540e\u7acb\u5373\u65ad\u5f00\uff1a\u67e5 TLS\u3001\u8ba4\u8bc1\u548c\u5e94\u7528\u65e5\u5fd7\uff1b<\/li>\n<li>\u670d\u52a1\u7aef\u54cd\u5e94\u5df2\u53d1\u51fa\u4f46\u5ba2\u6237\u7aef\u6536\u4e0d\u5230\uff1a\u67e5\u56de\u7a0b\u8def\u7531\u3001NAT \u4e0e\u975e\u5bf9\u79f0\u8def\u5f84\u3002<\/li>\n<\/ul>\n<p>\u6293\u5305\u53ef\u80fd\u5305\u542b\u5730\u5740\u548c\u4e1a\u52a1\u5185\u5bb9\uff0c\u5e94\u9650\u5236\u8fc7\u6ee4\u6761\u4ef6\u3001\u4fdd\u7ba1\u548c\u7559\u5b58\u65f6\u95f4\u3002<\/p>\n<h2>\u4fee\u590d\u65f6\u600e\u6837\u907f\u514d\u5b89\u5168\u5012\u9000\uff1f<\/h2>\n<ol>\n<li>\u8bb0\u5f55\u4fee\u6539\u524d\u89c4\u5219\u3001\u914d\u7f6e\u548c\u670d\u52a1\u72b6\u6001\uff1b<\/li>\n<li>\u53ea\u4fee\u6539\u4e00\u4e2a\u5c42\u7ea7\uff0c\u7acb\u5373\u590d\u6d4b\uff1b<\/li>\n<li>\u4e34\u65f6\u89c4\u5219\u9650\u5b9a\u6765\u6e90 IP\u3001\u76ee\u6807\u7aef\u53e3\u548c\u6709\u6548\u7a97\u53e3\uff1b<\/li>\n<li>\u914d\u7f6e\u53d8\u66f4\u5148\u505a\u8bed\u6cd5\u68c0\u67e5\uff0c\u518d reload\uff1b<\/li>\n<li>\u4fdd\u7559\u63a7\u5236\u53f0\u6216\u7b2c\u4e8c\u6761\u7ba1\u7406\u8fde\u63a5\uff0c\u907f\u514d\u628a\u81ea\u5df1\u9501\u5728\u95e8\u5916\uff1b<\/li>\n<li>\u9a8c\u8bc1\u540e\u5220\u9664\u4e34\u65f6\u5168\u5f00\u3001\u8c03\u8bd5\u8d26\u53f7\u548c\u6d4b\u8bd5\u5bb9\u5668\uff1b<\/li>\n<li>\u8bb0\u5f55\u6839\u56e0\u548c\u56de\u9000\u547d\u4ee4\uff0c\u8865\u76d1\u63a7\u548c\u81ea\u52a8\u5316\u68c0\u67e5\u3002<\/li>\n<\/ol>\n<h2>\u4fee\u590d\u540e\u7684\u9a8c\u6536\u6e05\u5355<\/h2>\n<ul>\n<li>\u6388\u6743\u6765\u6e90\u80fd\u7528\u771f\u5b9e\u534f\u8bae\u5b8c\u6210\u4e1a\u52a1\uff0c\u975e\u6388\u6743\u6765\u6e90\u4ecd\u88ab\u62d2\u7edd\uff1b<\/li>\n<li>IPv4\/IPv6\u3001\u57df\u540d\u3001\u8d1f\u8f7d\u5747\u8861\u548c\u6240\u6709\u540e\u7aef\u7ed3\u679c\u4e00\u81f4\uff1b<\/li>\n<li>\u5b89\u5168\u7ec4\u3001\u7cfb\u7edf\u9632\u706b\u5899\u4e0e\u6587\u6863\u4e2d\u7684\u7aef\u53e3\u6e05\u5355\u4e00\u81f4\uff1b<\/li>\n<li>\u670d\u52a1\u53ea\u76d1\u542c\u6240\u9700\u7f51\u5361\u548c\u7aef\u53e3\uff0c\u6ca1\u6709\u610f\u5916\u66b4\u9732\u6570\u636e\u5e93\u6216\u9762\u677f\uff1b<\/li>\n<li>\u5e94\u7528\u65e5\u5fd7\u3001\u9519\u8bef\u7387\u3001\u5ef6\u8fdf\u4e0e\u8d44\u6e90\u6062\u590d\u6b63\u5e38\uff1b<\/li>\n<li>\u91cd\u542f\u670d\u52a1\u6216\u5b9e\u4f8b\u540e\u89c4\u5219\u548c\u76d1\u542c\u4ecd\u7136\u5b58\u5728\uff1b<\/li>\n<li>\u7aef\u53e3\u626b\u63cf\u3001\u5f02\u5e38\u767b\u5f55\u548c\u670d\u52a1\u505c\u6b62\u5df2\u6709\u544a\u8b66\u3002<\/li>\n<\/ul>\n<h2>\u9700\u8981\u6362\u670d\u52a1\u5668\u5417\uff1f<\/h2>\n<p>\u5927\u591a\u6570\u7aef\u53e3\u6545\u969c\u6765\u81ea\u89c4\u5219\u3001\u76d1\u542c\u548c\u5e94\u7528\u914d\u7f6e\uff0c\u4e0d\u9700\u8981\u66f4\u6362 VPS\u3002\u53ea\u6709\u8bc1\u636e\u663e\u793a\u5f53\u524d\u8282\u70b9\u5b58\u5728\u6301\u7eed\u8def\u7531\u6545\u969c\u3001\u4ea7\u54c1\u4e0d\u652f\u6301\u6240\u9700\u7f51\u7edc\u80fd\u529b\uff0c\u6216\u65e7\u7cfb\u7edf\u65e0\u6cd5\u5b89\u5168\u7ef4\u62a4\u65f6\u624d\u8bc4\u4f30\u8fc1\u79fb\u3002\u9700\u8981\u6d4b\u8bd5\/\u66ff\u6362\u73af\u5883\u65f6\uff0c\u53ef\u5728<a href=\"https:\/\/www.ygcloud.com\/vps\/\">\u8424\u5149\u4e91 VPS \u4ea7\u54c1\u9875<\/a>\u6838\u5bf9\u5f53\u524d\u8282\u70b9\u548c\u7f51\u7edc\uff0c\u5e76\u7528<a href=\"https:\/\/www.ygcloud.com\/knowledge\/1412\/\">\u6d4b\u8bd5 IP \u9a8c\u6536\u65b9\u6cd5<\/a>\u9a8c\u8bc1\u3002<\/p>\n<h2>\u5e38\u89c1\u95ee\u9898<\/h2>\n<h3>\u5b89\u5168\u7ec4\u653e\u884c\u540e\u4e3a\u4ec0\u4e48\u4ecd\u4e0d\u901a\uff1f<\/h3>\n<p>\u7ee7\u7eed\u68c0\u67e5\u7cfb\u7edf\u9632\u706b\u5899\u3001\u670d\u52a1\u76d1\u542c\u3001\u7ed1\u5b9a\u5730\u5740\u3001\u5bb9\u5668\u6620\u5c04\u548c\u5e94\u7528\u534f\u8bae\uff1b\u5b89\u5168\u7ec4\u53ea\u662f\u6570\u636e\u8def\u5f84\u7684\u4e00\u5c42\u3002<\/p>\n<h3>Connection refused \u4e00\u5b9a\u662f\u9632\u706b\u5899\u5417\uff1f<\/h3>\n<p>\u4e0d\u4e00\u5b9a\u3002\u5b83\u901a\u5e38\u8bf4\u660e\u76ee\u6807\u4e3b\u52a8\u62d2\u7edd\uff0c\u5e38\u89c1\u4e8e\u6ca1\u6709\u670d\u52a1\u76d1\u542c\uff0c\u4e5f\u53ef\u80fd\u662f\u660e\u786e\u7684 reject \u89c4\u5219\u3002<\/p>\n<h3>\u80fd\u4e34\u65f6\u5bf9\u5168\u7f51\u5f00\u653e\u6392\u67e5\u5417\uff1f<\/h3>\n<p>\u4e0d\u5efa\u8bae\u3002\u4f18\u5148\u53ea\u5141\u8bb8\u5f53\u524d\u6d4b\u8bd5\u516c\u7f51 IP\uff0c\u5e76\u8bbe\u7f6e\u660e\u786e\u7684\u5220\u9664\u65f6\u95f4\uff1b\u6570\u636e\u5e93\u548c\u7ba1\u7406\u9762\u677f\u5c24\u5176\u4e0d\u80fd\u7528\u5168\u7f51\u5f00\u653e\u9a8c\u8bc1\u3002<\/p>\n<h2>\u76f8\u5173\u63a8\u8350<\/h2>\n<ul>\n<li><a href=\"https:\/\/www.ygcloud.com\/knowledge\/279\/\">VPS \u5e38\u7528\u7aef\u53e3\u4e0e\u5f00\u653e\u539f\u5219<\/a><\/li>\n<li><a href=\"https:\/\/www.ygcloud.com\/knowledge\/1320\/\">SSH \u8fde\u63a5\u5931\u8d25\u6392\u67e5<\/a><\/li>\n<li><a href=\"https:\/\/www.ygcloud.com\/knowledge\/888\/\">\u670d\u52a1\u5668\u5b89\u5168\u52a0\u56fa\u6e05\u5355<\/a><\/li>\n<li><a href=\"https:\/\/www.ygcloud.com\/knowledge\/1380\/\">\u670d\u52a1\u5668\u76d1\u63a7\u4e0e\u544a\u8b66<\/a><\/li>\n<\/ul>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p>\u5148\u8bf4\u7ed3\u8bba\uff1a\u670d\u52a1\u5668\u7aef\u53e3\u4e0d\u901a\uff0c\u8981\u6cbf\u6570\u636e\u8def\u5f84\u9010\u5c42\u68c0\u67e5\uff1a\u5ba2\u6237\u7aef\u4e0e DNS \u2192 \u516c\u7f51 IP\/\u8def\u7531 \u2192 \u4e91\u5b89\u5168\u7ec4 \u2192 \u7cfb\u7edf\u9632\u706b\u5899 \u2192 \u8fdb\u7a0b\u76d1\u542c \u2192 \u5bb9\u5668\u6216\u53cd\u5411\u4ee3\u7406 \u2192 \u5e94\u7528\u534f\u8bae\u3002\u4e0d\u8981\u5148\u628a\u6765\u6e90\u6539\u6210 0.0.0.0\/0\u3001\u5173\u95ed\u9632\u706b\u5899\u6216\u91cd\u88c5\u7cfb\u7edf\uff1b\u8fd9\u4e9b\u64cd\u4f5c\u65e2\u6269\u5927&#8230;<\/p>\n","protected":false},"author":1,"featured_media":1369,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12,100],"tags":[102],"topic":[],"class_list":["post-1368","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-website","category-100","tag-102"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ 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