{"id":240,"date":"2024-08-07T14:00:41","date_gmt":"2024-08-07T06:00:41","guid":{"rendered":"https:\/\/www.nightying.com\/?p=240"},"modified":"2024-08-07T14:00:41","modified_gmt":"2024-08-07T06:00:41","slug":"linuxlogfx","status":"publish","type":"post","link":"https:\/\/www.nightying.com\/index.php\/2024\/08\/07\/linuxlogfx\/","title":{"rendered":"Linux\u65e5\u5fd7\u5206\u6790"},"content":{"rendered":"\n<p><strong>\u5e38\u89c1\u65e5\u5fd7\u6587\u4ef6<\/strong><\/p>\n\n\n\n<p>Linux\u7cfb\u7edf\u4e2d\u7684\u65e5\u5fd7\u6587\u4ef6\u901a\u5e38\u5b58\u50a8\u5728&nbsp;<code>\/var\/log<\/code>\u200b \u76ee\u5f55\u4e0b\uff0c\u5e38\u89c1\u7684\u65e5\u5fd7\u6587\u4ef6\u5305\u62ec\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\/var\/log\/syslog<\/strong>\uff1a\u8bb0\u5f55\u7cfb\u7edf\u7684\u5404\u79cd\u4fe1\u606f\u548c\u9519\u8bef\u3002<\/li>\n\n\n\n<li><strong>\/var\/log\/auth.log<\/strong>\uff1a\u8bb0\u5f55\u8eab\u4efd\u9a8c\u8bc1\u76f8\u5173\u7684\u4fe1\u606f\uff0c\u5982\u767b\u5f55\u548c\u8ba4\u8bc1\u5931\u8d25\u3002<\/li>\n\n\n\n<li><strong>\/var\/log\/kern.log<\/strong>\uff1a\u8bb0\u5f55\u5185\u6838\u751f\u6210\u7684\u65e5\u5fd7\u4fe1\u606f\u3002<\/li>\n\n\n\n<li><strong>\/var\/log\/dmesg<\/strong>\uff1a\u8bb0\u5f55\u7cfb\u7edf\u542f\u52a8\u65f6\u5185\u6838\u4ea7\u751f\u7684\u6d88\u606f\u3002<\/li>\n\n\n\n<li><strong>\/var\/log\/boot.log<\/strong>\uff1a\u8bb0\u5f55\u7cfb\u7edf\u542f\u52a8\u8fc7\u7a0b\u4e2d\u7684\u6d88\u606f\u3002<\/li>\n\n\n\n<li><strong>\/var\/log\/messages<\/strong>\uff1a\u8bb0\u5f55\u7cfb\u7edf\u7684\u5e7f\u6cdb\u6d88\u606f\uff0c\u5305\u62ec\u542f\u52a8\u548c\u5e94\u7528\u7a0b\u5e8f\u4fe1\u606f\u3002<\/li>\n\n\n\n<li><strong>\/var\/log\/secure<\/strong>\uff1a\u8bb0\u5f55\u5b89\u5168\u76f8\u5173\u7684\u6d88\u606f\u3002<\/li>\n\n\n\n<li><strong>\/var\/log\/httpd\/<\/strong>\u00a0\uff1a\u8bb0\u5f55Apache HTTP\u670d\u52a1\u5668\u7684\u8bbf\u95ee\u548c\u9519\u8bef\u65e5\u5fd7\uff08\u82e5\u5b89\u88c5\u4e86Apache\uff09\u3002<\/li>\n\n\n\n<li><strong>\/var\/log\/nginx\/<\/strong>\u00a0\uff1a\u8bb0\u5f55Nginx\u670d\u52a1\u5668\u7684\u8bbf\u95ee\u548c\u9519\u8bef\u65e5\u5fd7\uff08\u82e5\u5b89\u88c5\u4e86Nginx\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u7384\u673a\u7684Linux\u65e5\u5fd7\u5206\u6790\u4e2d\uff0c\u67095\u4e2a\u9898\u76ee<\/p>\n\n\n\n<p>1.\u6709\u591a\u5c11IP\u5728\u7206\u7834\u4e3b\u673assh\u7684root\u5e10\u53f7\uff0c\u5982\u679c\u6709\u591a\u4e2a\u4f7f\u7528&#8221;,&#8221;\u5206\u5272<br>2.ssh\u7206\u7834\u6210\u529f\u767b\u9646\u7684IP\u662f\u591a\u5c11\uff0c\u5982\u679c\u6709\u591a\u4e2a\u4f7f\u7528&#8221;,&#8221;\u5206\u5272<br>3.\u7206\u7834\u7528\u6237\u540d\u5b57\u5178\u662f\u4ec0\u4e48\uff1f\u5982\u679c\u6709\u591a\u4e2a\u4f7f\u7528&#8221;,&#8221;\u5206\u5272<br>4.\u767b\u9646\u6210\u529f\u7684IP\u5171\u7206\u7834\u4e86\u591a\u5c11\u6b21<br>5.\u9ed1\u5ba2\u767b\u9646\u4e3b\u673a\u540e\u65b0\u5efa\u4e86\u4e00\u4e2a\u540e\u95e8\u7528\u6237\uff0c\u7528\u6237\u540d\u662f\u591a\u5c11<\/p>\n\n\n\n<p>\u7b2c\u4e00\u4e2a\u9898\u76ee\u57fa\u672c\u4e0a\u5c31\u662f\u53bb\u67e5\u770b\/var\/log\/auth.log\uff08auth.log.1\u662f\u5907\u4efd\u6587\u4ef6\uff09<\/p>\n\n\n\n<p>\u4f46\u662f\u8fd9\u6837\u67e5\u770b\u4f1a\u51fa\u73b0\u5f88\u591a\u6761\u65e5\u5fd7\uff0c\u90a3\u4e48\u5c31\u9700\u8981\u5408\u5e76\u4e00\u4e0b<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code><strong>cat auth.log.1 | grep -a \"Failed password for root\" | awk '{print $11}' | sort | uniq -c | sort -nr | more<\/strong><\/code><\/pre>\n\n\n\n<p>\u5206\u6790\u4e00\u4e0b\u5177\u4f53\u542b\u4e49<\/p>\n\n\n\n<ol class=\"wp-block-list\"><\/ol>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code><strong>\u200b\u200bcat auth.log.1\u200b\u200b:\n\n\u200bcat\u200b \u547d\u4ee4\u7528\u4e8e\u663e\u793a\u00a0auth.log.1\u200b \u6587\u4ef6\u7684\u5185\u5bb9\u3002\n\n\u8fd9\u91cc\u00a0auth.log.1\u200b \u662f\u4e00\u4e2a\u65e5\u5fd7\u6587\u4ef6\uff0c\u901a\u5e38\u662f\u7cfb\u7edf\u65e5\u5fd7\u7684\u5907\u4efd\u6587\u4ef6\u3002\n\n\u200b\u00a0\u200b|\u200b\u00a0\u200b:\n\n\u7ba1\u9053\u7b26\u53f7\uff0c\u7528\u4e8e\u5c06\u524d\u4e00\u4e2a\u547d\u4ee4\u7684\u8f93\u51fa\u4f5c\u4e3a\u4e0b\u4e00\u4e2a\u547d\u4ee4\u7684\u8f93\u5165\u3002\n\n\u200b\u200bgrep -a \"Failed password for root\"\u200b\u00a0\u200b:\n\n\u200bgrep\u200b \u547d\u4ee4\u7528\u4e8e\u5728\u8f93\u5165\u4e2d\u641c\u7d22\u5305\u542b\u7279\u5b9a\u6a21\u5f0f\u7684\u884c\u3002\n\n\u200b-a\u200b \u9009\u9879\u8868\u793a\u5c06\u6587\u4ef6\u5185\u5bb9\u89c6\u4e3a\u6587\u672c\u6587\u4ef6\uff08\u6b64\u9009\u9879\u901a\u5e38\u5728\u5904\u7406\u4e8c\u8fdb\u5236\u6587\u4ef6\u65f6\u4f7f\u7528\uff0c\u4f46\u5bf9\u4e8e\u7eaf\u6587\u672c\u6587\u4ef6\uff0c\u53ef\u4ee5\u7701\u7565\uff09\u3002\n\n\u200b\"Failed password for root\"\u200b \u662f\u641c\u7d22\u6a21\u5f0f\uff0c\u5373\u67e5\u627e\u6240\u6709\u5305\u542b\"Failed password for root\"\u7684\u884c\uff0c\u8fd9\u4e9b\u884c\u8868\u793a\u5c1d\u8bd5\u767b\u5f55root\u7528\u6237\u7684\u5931\u8d25\u5c1d\u8bd5\u3002\n\n\u200b\u200bawk '{print $11}'\u200b\u00a0\u200b:\n\n\u200bawk\u200b \u662f\u4e00\u4e2a\u6587\u672c\u5904\u7406\u5de5\u5177\uff0c\u7528\u4e8e\u6309\u5b57\u6bb5\u5904\u7406\u6587\u672c\u3002\n\n\u200b{print $11}\u200b \u8868\u793a\u6253\u5370\u6bcf\u884c\u7684\u7b2c11\u4e2a\u5b57\u6bb5\u3002\u5047\u8bbe\u65e5\u5fd7\u683c\u5f0f\u4e3a\u6807\u51c6\u683c\u5f0f\uff0c\u7b2c11\u4e2a\u5b57\u6bb5\u901a\u5e38\u662fIP\u5730\u5740\u3002\n\n\u200b\u200bsort\u200b\u200b:\n\n\u200bsort\u200b \u547d\u4ee4\u7528\u4e8e\u5bf9\u8f93\u5165\u884c\u8fdb\u884c\u6392\u5e8f\u3002\n\n\u8fd9\u91cc\u662f\u5bf9\u63d0\u53d6\u7684IP\u5730\u5740\u8fdb\u884c\u6392\u5e8f\u3002\n\n\u200b\u200buniq -c\u200b\u200b:\n\n\u200buniq\u200b \u547d\u4ee4\u7528\u4e8e\u5220\u9664\u91cd\u590d\u7684\u884c\u3002\n\n\u200b-c\u200b \u9009\u9879\u8868\u793a\u5bf9\u6bcf\u4e2a\u552f\u4e00\u7684\u884c\u8ba1\u6570\uff0c\u5373\u7edf\u8ba1\u6bcf\u4e2aIP\u5730\u5740\u7684\u51fa\u73b0\u6b21\u6570\u3002\n\n\u200b\u200bsort -nr\u200b\u200b:\n\n\u200bsort\u200b \u547d\u4ee4\u518d\u6b21\u7528\u4e8e\u6392\u5e8f\u3002\n\n\u200b-n\u200b \u9009\u9879\u8868\u793a\u6309\u6570\u503c\u8fdb\u884c\u6392\u5e8f\u3002\n\n\u200b-r\u200b \u9009\u9879\u8868\u793a\u6309\u964d\u5e8f\u6392\u5e8f\u3002\n\n\u7ec4\u5408\u8d77\u6765\uff0c\u5373\u6309\u51fa\u73b0\u6b21\u6570\u4ece\u9ad8\u5230\u4f4e\u6392\u5e8f\u3002\n\n\u200b\u200bmore\u200b\u200b:\n\n\u200bmore\u200b \u547d\u4ee4\u7528\u4e8e\u5206\u9875\u663e\u793a\u8f93\u51fa\u3002\n\n\u7531\u4e8e\u8f93\u51fa\u53ef\u80fd\u5f88\u957f\uff0cmore\u200b \u547d\u4ee4\u5141\u8bb8\u7528\u6237\u9010\u9875\u67e5\u770b\u7ed3\u679c\u3002<\/strong><\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<p>\u7b2c\u4e8c\u4e2a\u9898\u76ee\u8ddf\u7b2c\u4e00\u4e2a\u5176\u5b9e\u5dee\u4e0d\u591a\uff0c\u53ea\u4e0d\u8fc7\u628a\u767b\u5f55\u5931\u8d25\u6362\u6210\u767b\u5f55\u6210\u529f\uff1a<strong>Accepted<\/strong><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>\u7b2c\u4e09\u9898\u83b7\u53d6\u7206\u7834\u7684\u7528\u6237\u540d\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code><strong>cat auth.log.1 | grep -a \"Failed password\" |perl -e 'while($_=&lt;>){ \/for(.*?) from\/; print \"$1\\n\";}'|uniq -c|sort -nr<\/strong><\/code><\/pre>\n\n\n\n<p>\u5206\u6790\u4e00\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code><strong>\u200b\u200bcat auth.log.1\u200b\u200b:\n\n\u4f5c\u7528\uff1a\u8bfb\u53d6\u65e5\u5fd7\u6587\u4ef6auth.log.1\u200b\u7684\u5185\u5bb9\u5e76\u5c06\u5176\u4f20\u9012\u5230\u4e0b\u4e00\u6b65\u3002\u8fd9\u4e2a\u6587\u4ef6\u901a\u5e38\u5305\u542b\u7cfb\u7edf\u7684\u8eab\u4efd\u9a8c\u8bc1\u65e5\u5fd7\u3002\n\n\u200b\u200bgrep -a \"Failed password\"\u200b\u00a0\u200b:\n\n\u4f5c\u7528\uff1a\u5728\u65e5\u5fd7\u6587\u4ef6\u4e2d\u67e5\u627e\u5305\u542b\u201cFailed password\u201d\u7684\u884c\u3002\u8fd9\u4e9b\u884c\u8bb0\u5f55\u4e86SSH\u767b\u5f55\u5931\u8d25\u7684\u4e8b\u4ef6\u3002\n\n\u200b-a\u200b\u9009\u9879\uff1a\u901a\u5e38\u7528\u4e8e\u5904\u7406\u4e8c\u8fdb\u5236\u6587\u4ef6\u65f6\u5c06\u5176\u89c6\u4e3a\u6587\u672c\u6587\u4ef6\uff0c\u8fd9\u91cc\u4e00\u822c\u53ef\u4ee5\u5ffd\u7565\uff0c\u56e0\u4e3aauth.log.1\u200b\u5e94\u8be5\u662f\u7eaf\u6587\u672c\u6587\u4ef6\u3002\n\n\u200b\u200bperl -e 'while(1\\n\";}'\u200b\u00a0\u200b:\n\n\u4f5c\u7528\uff1a\u4f7f\u7528Perl\u811a\u672c\u4ece\u6bcf\u4e00\u884c\u63d0\u53d6\u51fa\u5931\u8d25\u767b\u5f55\u5c1d\u8bd5\u7684\u7528\u6237\u540d\u3002\n\n\u200bwhile($_=&lt;>)\u200b\uff1a\u9010\u884c\u8bfb\u53d6\u8f93\u5165\u3002\n\n\u200b\/for(.*?) from\/\u200b\uff1a\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u5339\u914d\u6a21\u5f0f\u201cfor &#91;username] from\u201d\uff0c\u5176\u4e2d&#91;username]\u200b\u662f\u767b\u5f55\u5c1d\u8bd5\u7684\u7528\u6237\u540d\u3002\n\n\u200bprint \"$1\\n\"\u200b\uff1a\u5c06\u63d0\u53d6\u7684\u7528\u6237\u540d\u6253\u5370\u51fa\u6765\u3002\n\n\u200b\u200buniq -c\u200b\u200b:\n\n\u4f5c\u7528\uff1a\u5bf9\u63d0\u53d6\u51fa\u7684\u7528\u6237\u540d\u8fdb\u884c\u53bb\u91cd\u5e76\u8ba1\u6570\u3002\u6bcf\u4e2a\u552f\u4e00\u7684\u7528\u6237\u540d\u4f1a\u4e0e\u5176\u51fa\u73b0\u7684\u6b21\u6570\u4e00\u8d77\u8f93\u51fa\u3002\n\n\u200b-c\u200b\u9009\u9879\uff1a\u5728\u6bcf\u4e2a\u552f\u4e00\u9879\u7684\u524d\u9762\u663e\u793a\u51fa\u73b0\u6b21\u6570\u3002\n\n\u200b\u200bsort -nr\u200b\u200b:\n\n\u4f5c\u7528\uff1a\u6839\u636e\u51fa\u73b0\u6b21\u6570\u8fdb\u884c\u964d\u5e8f\u6392\u5e8f\u3002\u8fd9\u6837\u51fa\u73b0\u6b21\u6570\u6700\u591a\u7684\u7528\u6237\u540d\u4f1a\u6392\u5728\u6700\u524d\u9762\u3002\n\n\u200b-n\u200b\u9009\u9879\uff1a\u6309\u7167\u6570\u503c\u6392\u5e8f\u3002\n\n\u200b-r\u200b\u9009\u9879\uff1a\u6309\u7167\u964d\u5e8f\u6392\u5e8f\u3002<\/strong><\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u603b\u7ed3<\/strong><\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code><strong>\u8fd9\u4e2a\u547d\u4ee4\u94fe\u6761\u901a\u8fc7\u4ee5\u4e0b\u6b65\u9aa4\u7edf\u8ba1\u6bcf\u4e2a\u7528\u6237\u540d\u7684SSH\u5931\u8d25\u767b\u5f55\u5c1d\u8bd5\u6b21\u6570\uff1a\n\n\u8bfb\u53d6\u65e5\u5fd7\u6587\u4ef6\u5e76\u7b5b\u9009\u51fa\u5931\u8d25\u767b\u5f55\u7684\u8bb0\u5f55\u3002\n\n\u4f7f\u7528Perl\u811a\u672c\u4ece\u8bb0\u5f55\u4e2d\u63d0\u53d6\u7528\u6237\u540d\u3002\n\n\u5bf9\u7528\u6237\u540d\u8fdb\u884c\u53bb\u91cd\u548c\u8ba1\u6570\u3002\n\n\u6309\u5c1d\u8bd5\u6b21\u6570\u964d\u5e8f\u6392\u5217\u3002<\/strong><\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<p>\u7b2c\u56db\u4e2a\u9898\u4e5f\u662f\u7edf\u8ba1\uff0c\u518d\u6b21\u8df3\u8fc7<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>\u7b2c\u4e94\u9898\u662f\u9700\u8981\u67e5\u8be2\u65b0\u5efa\u7528\u6237\u7684\u65e5\u5fd7<\/p>\n\n\n\n<p>cat auth.log.1 |grep -a &#8220;new user&#8221;<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>\u67e5\u770bauth.log.1\uff0c\u5e76\u4e14\u628a\u5185\u5bb9\u901a\u8fc7grep\uff08\u5c3d\u91cf\u52a0\u4e0a-a \u53ef\u4ee5\u628a\u4e8c\u8fdb\u5236\u6587\u4ef6\u8f6c\u6362\u6210\u6587\u672c\u6765\u8bfb\u53d6\uff09\u8fc7\u6ee4<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5e38\u89c1\u65e5\u5fd7\u6587\u4ef6 Linux\u7cfb\u7edf\u4e2d\u7684\u65e5\u5fd7\u6587\u4ef6\u901a\u5e38\u5b58\u50a8\u5728&nbsp;\/var\/log\u200b \u76ee\u5f55\u4e0b\uff0c\u5e38\u89c1\u7684\u65e5\u5fd7\u6587\u4ef6\u5305\u62ec\uff1a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[],"class_list":["post-240","post","type-post","status-publish","format-standard","hentry","category-response"],"_links":{"self":[{"href":"https:\/\/www.nightying.com\/index.php\/wp-json\/wp\/v2\/posts\/240","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nightying.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nightying.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nightying.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nightying.com\/index.php\/wp-json\/wp\/v2\/comments?post=240"}],"version-history":[{"count":7,"href":"https:\/\/www.nightying.com\/index.php\/wp-json\/wp\/v2\/posts\/240\/revisions"}],"predecessor-version":[{"id":247,"href":"https:\/\/www.nightying.com\/index.php\/wp-json\/wp\/v2\/posts\/240\/revisions\/247"}],"wp:attachment":[{"href":"https:\/\/www.nightying.com\/index.php\/wp-json\/wp\/v2\/media?parent=240"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nightying.com\/index.php\/wp-json\/wp\/v2\/categories?post=240"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nightying.com\/index.php\/wp-json\/wp\/v2\/tags?post=240"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}