{"id":245,"date":"2022-12-13T22:38:07","date_gmt":"2022-12-13T14:38:07","guid":{"rendered":"https:\/\/www.yiyuanlt.cn\/?p=245"},"modified":"2022-12-13T22:38:07","modified_gmt":"2022-12-13T14:38:07","slug":"%e5%ae%89%e5%85%a8%e5%9f%ba%e7%ba%bf%e6%a3%80%e6%9f%a5%e7%9a%84%e5%b8%b8%e8%a7%81%e6%80%9d%e8%b7%af","status":"publish","type":"post","link":"https:\/\/www.yiyuanlt.cn\/index.php\/2022\/12\/13\/%e5%ae%89%e5%85%a8%e5%9f%ba%e7%ba%bf%e6%a3%80%e6%9f%a5%e7%9a%84%e5%b8%b8%e8%a7%81%e6%80%9d%e8%b7%af\/","title":{"rendered":"<a href=\"https:\/\/www.iculture.cc\/cybersecurity\/pig=27883\">\u5b89\u5168\u57fa\u7ebf\u68c0\u67e5\u7684\u5e38\u89c1\u601d\u8def<\/a>"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\" id=\"wznav_0\">Linux<\/h1>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"wznav_1\">\u8d26\u53f7\u7ba1\u7406<\/h3>\n\n\n\n<p>1\u3001\u68c0\u67e5\u5bc6\u7801\u9519\u8bef\u8fc7\u591a \u9501\u5b9a\u8bbe\u7f6e<\/p>\n\n\n\n<p>\u67e5\u770b\u914d\u7f6e\u6587\u4ef6\uff1a<code>more \/etc\/pam.d\/password-auth<\/code>\uff0c\u7528\u6237\u8fde\u7eed\u8ba4\u8bc1\u5931\u8d25\u6b21\u6570\u8bbe\u7f6e\u4e3a5\u5373\u5408\u89c4\uff0c\u5426\u5219\u4e0d\u5408\u89c4<\/p>\n\n\n\n<p>2\u3001\u68c0\u67e5\u5bc6\u7801\u6709\u6548\u671f \u8bbe\u7f6e<\/p>\n\n\n\n<p>\u67e5\u770b\u6587\u4ef6\uff1a<code>more \/etc\/login.defs<\/code>\uff0c\u7528\u6237\u7684\u5bc6\u7801\u6700\u957f\u4f7f\u7528\u5929\u6570\u4e0d\u5927\u4e8e90\uff0c\u7528\u6237\u7684\u5bc6\u7801\u5230\u671f\u63d0\u524d\u63d0\u9192\u5929\u6570\u4e3a7<\/p>\n\n\n\n<p>3\u3001\u68c0\u67e5\u5bc6\u7801\u590d\u6742\u5ea6 \u8bbe\u7f6e<\/p>\n\n\n\n<p>\u67e5\u770b\u6587\u4ef6\uff1a<code>more \/etc\/security\/pwquality.conf<\/code>\u81f3\u5c11\u5305\u542b\u6570\u5b57\u3001\u5c0f\u5199\u5b57\u6bcd\u3001\u5927\u5199\u5b57\u6bcd\u3001\u7279\u6b8a\u5b57\u7b26\u4e2d\u7684\u4e09\u9879\uff0c\u4e14\u5bc6\u7801\u957f\u5ea6&gt;=8<\/p>\n\n\n\n<p>4\u3001\u68c0\u67e5\u5bc6\u7801\u91cd\u7528\u662f\u5426\u6709\u9650\u5236<\/p>\n\n\n\n<p>\u67e5\u770b\u6587\u4ef6\uff1a<code>cat \/etc\/pam.d\/system-auth<\/code>&nbsp;\uff0c\u6709<code>remember<\/code>\u53c2\u6570\u4e14\u53c2\u6570\u7684\u503c\u5927\u4e8e\u7b49\u4e8e5\u5373\u5408\u89c4\uff0c\u5426\u5219\u4e0d\u5408\u89c4<\/p>\n\n\n\n<p>5\u3001\u68c0\u67e5\u662f\u5426\u5b58\u5728\u9664root\u4e4b\u5916UID\u4e3a0\u7684\u7528\u6237<\/p>\n\n\n\n<p>6\u3001\u68c0\u67e5\u662f\u5426\u5b58\u5728\u7a7a\u5bc6\u7801\u7684\u5e10\u6237<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"wznav_2\">\u670d\u52a1\u7ba1\u7406<\/h3>\n\n\n\n<p>1\u3001\u68c0\u67e5\u662f\u5426\u7981\u6b62SSH\u7a7a\u5bc6\u7801\u7528\u6237\u767b\u5f55<\/p>\n\n\n\n<p>\u67e5\u770b\u6587\u4ef6\uff1a<code>more \/etc\/ssh\/sshd_config<\/code>\u7684<code>PermitEmptyPasswords<\/code>\u914d\u7f6e\u60c5\u51b5\uff0c\u5176\u503c\u8bbe\u7f6e\u4e3a<code>no<\/code>\u5373\u5408\u89c4\uff0c\u5426\u5219\u4e0d\u5408\u89c4<\/p>\n\n\n\n<p>2\u3001\u8bbe\u7f6essh\u591a\u6b21\u767b\u5f55\u5931\u8d25\u540e\u9501\u5b9a\u7528\u6237<\/p>\n\n\n\n<p>\u67e5\u770b\u6587\u4ef6\uff1a<code>more \/etc\/pam.d\/sshd<\/code>\u4e2d\uff0c\u5b58\u5728<code>deny<\/code>\u5c0f\u4e8e\u7b49\u4e8e5\uff0c<code>unlock_time<\/code>\u5927\u4e8e\u7b49\u4e8e300\uff0c\u5426\u5219\u4e0d\u5408\u89c4<\/p>\n\n\n\n<p>3\u3001\u9650\u5236root\u7528\u6237\u8fdc\u7a0b\u767b\u5f55<\/p>\n\n\n\n<p>\u67e5\u770b\u6587\u4ef6\uff1a<code>more \/etc\/ssh\/sshd_config\u7684PermitRootLogin<\/code>\u503c\uff0c\u5982\u679c\u503c\u4e3a<code>no<\/code>\u4e14\u8be5\u884c\u6ca1\u6709\u88ab\u6ce8\u91ca\u5373\u5408\u89c4\uff0c\u5426\u5219\u4e0d\u5408\u89c4<\/p>\n\n\n\n<p>4\u3001\u68c0\u67e5ssh\u4f7f\u7528\u7684\u7aef\u53e3<\/p>\n\n\n\n<p>\u67e5\u770b\u6587\u4ef6\uff1a<code>more \/etc\/ssh\/sshd_config<\/code>\u7684Port\u53c2\u6570\uff0c\u503c\u4e0d\u662f\u9ed8\u8ba4\u503c\uff0822\uff09\u4e14\u8be5\u884c\u6ca1\u6709\u88ab\u6ce8\u91ca\u5373\u5408\u89c4\uff0c\u5426\u5219\u4e0d\u5408\u89c4<\/p>\n\n\n\n<p>5\u3001\u8bbe\u7f6e\u767b\u5f55\u8d85\u65f6\u81ea\u52a8\u6ce8\u9500<\/p>\n\n\n\n<p>\u67e5\u770b\u6587\u4ef6\uff1a<code>more \/etc\/profile \u7684export TMOUT<\/code>\u53c2\u6570\u503c\uff0c\u5176\u503c\u5c0f\u4e8e\u7b49\u4e8e180\u5373\u5408\u89c4\uff0c\u5426\u5219\u4e0d\u5408\u89c4<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"wznav_3\">\u6743\u9650\u7ba1\u7406<\/h3>\n\n\n\n<p>umask\u503c\uff1a\u5f53\u524d\u7528\u6237\u9ed8\u8ba4\u503c\u9700\u8981\u51cf\u6389\u7684\u6743\u9650<\/p>\n\n\n\n<p>\u6587\u4ef6\u5939\u9ed8\u8ba4\uff1a777<\/p>\n\n\n\n<p>\u6587\u4ef6\u9ed8\u8ba4\uff1a666<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/static.iculture.cc\/wp-content\/uploads\/2022\/12\/20221130162154514.png?x-oss-process=image\/auto-orient,1\/format,webp\/watermark,image_cHVibGljL2xvZ28ucG5nP3gtb3NzLXByb2Nlc3M9aW1hZ2UvcmVzaXplLFBfMTA,x_10,y_10\" alt=\"7269932fdd002154\"\/><\/figure>\n\n\n\n<p>1\u3001\u68c0\u67e5\u7528\u6237umask\u503c<\/p>\n\n\n\n<p>\u67e5\u770b\u6587\u4ef6\uff1a<code>more \/etc\/profile<\/code>\u7684umask\u503c\uff0c\u6587\u4ef6\u672b\u5c3e\u5b58\u5728<code>umask 027<\/code>\uff0c\u5219\u5408\u89c4\uff0c\u5426\u5219\u4e3a\u4e0d\u5408\u89c4<\/p>\n\n\n\n<p>2\u3001\u68c0\u67e5\u91cd\u8981\u76ee\u5f55\u548c\u6587\u4ef6\u7684\u6743\u9650\u8bbe\u7f6e<\/p>\n\n\n\n<p>\u67e5\u770b<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">ls -l \/etc\/passwd \/etc\/shadow \/etc\/group \/etc\/gshadow \/etc\/hosts.allow \/etc\/hosts.allow \/etc\/services \/etc\/ssh\/sshd_config<\/pre>\n\n\n\n<p><code>\/etc\/passwd<\/code>\u6587\u4ef6\u7684\u6743\u9650&lt;=644<\/p>\n\n\n\n<p><code>\/etc\/shadow<\/code>\u6587\u4ef6\u7684\u6743\u9650&lt;=600<\/p>\n\n\n\n<p><code>\/etc\/group<\/code>\u6587\u4ef6\u7684\u6743\u9650&lt;=644<\/p>\n\n\n\n<p><code>\/etc\/gshadow<\/code>\u6587\u4ef6\u7684\u6743\u9650&lt;=600<\/p>\n\n\n\n<p><code>\/etc\/hosts.deny<\/code>\u6587\u4ef6\u7684\u6743\u9650&lt;=644<\/p>\n\n\n\n<p><code>\/etc\/hosts.allow<\/code>\u6587\u4ef6\u7684\u6743\u9650&lt;=644<\/p>\n\n\n\n<p><code>\/etc\/services<\/code>\u6587\u4ef6\u7684\u6743\u9650&lt;=644<\/p>\n\n\n\n<p><code>\/etc\/ssh\/sshd_config<\/code>\u6587\u4ef6\u7684\u6743\u9650&lt;=600<\/p>\n\n\n\n<p>\u4ee5\u4e0a\u6761\u4ef6\u540c\u65f6\u6ee1\u8db3\u5219\u5408\u89c4\uff0c\u5426\u5219\u4e0d\u5408\u89c4\u3002<\/p>\n\n\n\n<p>3\u3001\u9650\u5236\u53ef\u4ee5su\u4e3aroot\u7684\u7528\u6237<\/p>\n\n\n\n<p>\u9632\u6b62\u5176\u4ed6\u7528\u6237\u77e5\u9053\u4e86root\u5bc6\u7801\uff0c\u5728\u666e\u901a\u7528\u6237\u901a\u8fc7su \u83b7\u5f97\u9ad8\u6743\u9650<\/p>\n\n\n\n<p>\u67e5\u770b\u6587\u4ef6\uff1a<code>more \/etc\/pam.d\/su<\/code>\uff0c\u5b58\u5728auth required pam_wheel.so use_uid\u4e14\u672a\u88ab\u6ce8\u91ca\u5373\u5408\u89c4\uff0c\u5426\u5219\u4e0d\u5408\u89c4<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"wznav_4\">\u65e5\u5fd7\u7ba1\u7406<\/h3>\n\n\n\n<p>\u7cfb\u7edf\u4e2d\u7684\u7a0b\u5e8f\u4f1a\u628a\u81ea\u5df1\u7684\u65e5\u5fd7\u6587\u4ef6\u4ea4\u7531rsyslog\u7ba1\u7406\uff0c\u5176\u89c4\u5b9a\u4e86\u5bf9\u5e94\u7a0b\u5e8f\u5b58\u50a8\u65e5\u5fd7\u7684\u5730\u5740\uff0c\u548c\u5b58\u50a8\u4f18\u5148\u7ea7\uff08\u5982\/var\/log\/messages \u5b58\u653e\u7684\u662f\u7cfb\u7edf\u7684\u65e5\u5fd7\u4fe1\u606f\uff0c\u5b83\u8bb0\u5f55\u4e86\u5404\u79cd\u4e8b\u4ef6<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/static.iculture.cc\/wp-content\/uploads\/2022\/12\/20221130162215406.png?x-oss-process=image\/auto-orient,1\/format,webp\/watermark,image_cHVibGljL2xvZ28ucG5nP3gtb3NzLXByb2Nlc3M9aW1hZ2UvcmVzaXplLFBfMTA,x_10,y_10\" alt=\"b324542087002215\"\/><\/figure>\n\n\n\n<p>1\u3001\u68c0\u67e5rsyslog\u670d\u52a1\u662f\u5426\u542f\u7528\u4e14\u5bf9\u6240\u6709\u767b\u5f55\u4e8b\u4ef6\u90fd\u8bb0\u5f55<\/p>\n\n\n\n<p>\u67e5\u770b\u6587\u4ef6\uff1a<code>more \/etc\/rsyslog.conf\u7684authpriv<\/code>\u503c\uff0c\u5982\u679c<code>authpriv<\/code>\u503c\u4e3aauthpriv.* \/var\/log\/secure\u5373\u5408\u89c4\uff0c\u5426\u5219\u4e0d\u5408\u89c4<\/p>\n\n\n\n<p>2\u3001\u68c0\u67e5\u662f\u5426\u542f\u7528\u8bb0\u5f55\u5b9a\u65f6\u4efb\u52a1\u884c\u4e3a\u65e5\u5fd7\u529f\u80fd<\/p>\n\n\n\n<p>\u67e5\u770b\u6587\u4ef6\uff1a<code>more \/etc\/rsyslog.conf<\/code>\u7684<code>cron<\/code>\u503c\uff0c\u5982\u679c<code>cron<\/code>\u503c\u4e3a<code>cron.*&nbsp;<\/code>\u5373\u5408\u89c4\uff0c\u5426\u5219\u4e0d\u5408\u89c4<\/p>\n\n\n\n<p>3\u3001\u68c0\u67e5\u662f\u5426\u5c06&nbsp;<code>\/var\/log\/messages<\/code>&nbsp;\u6587\u4ef6\u8bbe\u7f6e\u4e3a\u53ea\u53ef\u8ffd\u52a0<\/p>\n\n\n\n<p>\u67e5\u770b\u6587\u4ef6\uff1a<code>lsattr \/var\/log\/messages<\/code>&nbsp;\uff0c\u5982\u679c\u5176\u6587\u4ef6\u5c5e\u6027\u7b2c\u516d\u4f4d\u4e3aa\u5373\u5408\u89c4\uff0c\u5426\u5219\u4e0d\u5408\u89c4<\/p>\n\n\n\n<p>4\u3001\u68c0\u67e5<code>SSHLogLevel<\/code>\u8bbe\u7f6e\u4e3a<code>INFO<\/code><\/p>\n\n\n\n<p>\u67e5\u770b\u6587\u4ef6\uff1a<code>more vi \/etc\/ssh\/sshd_config<\/code>&nbsp;\u7684<code>LogLevel<\/code>\u7ea7\u522b\uff0c\u5982\u679c\u5176\u4e3aINFO\u4e14\u8be5\u884c\u672a\u88ab\u6ce8\u91ca\u5373\u5408\u89c4\uff0c\u5426\u5219\u4e0d\u5408\u89c4<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Linux \u8d26\u53f7\u7ba1\u7406 1\u3001\u68c0\u67e5\u5bc6\u7801\u9519\u8bef\u8fc7\u591a \u9501\u5b9a\u8bbe\u7f6e \u67e5\u770b\u914d\u7f6e\u6587\u4ef6\uff1amore \/etc\/pam.d\/password-auth\uff0c\u7528 &#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"emotion":"","emotion_color":"","title_style":"","license":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-245","post","type-post","status-publish","format-standard","hentry","category-sort"],"_links":{"self":[{"href":"https:\/\/www.yiyuanlt.cn\/index.php\/wp-json\/wp\/v2\/posts\/245","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.yiyuanlt.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.yiyuanlt.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.yiyuanlt.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.yiyuanlt.cn\/index.php\/wp-json\/wp\/v2\/comments?post=245"}],"version-history":[{"count":1,"href":"https:\/\/www.yiyuanlt.cn\/index.php\/wp-json\/wp\/v2\/posts\/245\/revisions"}],"predecessor-version":[{"id":246,"href":"https:\/\/www.yiyuanlt.cn\/index.php\/wp-json\/wp\/v2\/posts\/245\/revisions\/246"}],"wp:attachment":[{"href":"https:\/\/www.yiyuanlt.cn\/index.php\/wp-json\/wp\/v2\/media?parent=245"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yiyuanlt.cn\/index.php\/wp-json\/wp\/v2\/categories?post=245"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yiyuanlt.cn\/index.php\/wp-json\/wp\/v2\/tags?post=245"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}