{"id":3005,"date":"2025-09-29T09:21:01","date_gmt":"2025-09-29T00:21:01","guid":{"rendered":"https:\/\/blog.id774.net\/entry\/?p=3005"},"modified":"2025-09-29T09:54:36","modified_gmt":"2025-09-29T00:54:36","slug":"sudo-%e3%82%b3%e3%83%9e%e3%83%b3%e3%83%89%e3%81%ae%e5%ae%9f%e8%a1%8c%e5%b1%a5%e6%ad%b4%e3%82%92-auth-log-%e3%81%8b%e3%82%89%e5%88%86%e9%9b%a2%e3%81%99%e3%82%8b","status":"publish","type":"post","link":"https:\/\/blog.id774.net\/entry\/2025\/09\/29\/3005\/","title":{"rendered":"sudo \u30b3\u30de\u30f3\u30c9\u306e\u5b9f\u884c\u5c65\u6b74\u3092 auth.log \u304b\u3089\u5206\u96e2\u3059\u308b"},"content":{"rendered":"<h2>\n\u60c5\u5831\u5206\u96e2\u306e\u691c\u8a0e<br \/>\n<\/h2>\n<p>\u65e5\u5e38\u7684\u306b\u78ba\u8a8d\u3057\u3066\u3044\u308b \/var\/log\/auth.log \u306b\u306f\u3001ssh \u30ed\u30b0\u30a4\u30f3\u306e\u6210\u529f\u30fb\u5931\u6557\u3084\u3001su \u306e\u5229\u7528\u3001PAM \u3092\u901a\u3058\u305f\u8a8d\u8a3c\u30a4\u30d9\u30f3\u30c8\u306a\u3069\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u76e3\u67fb\u306b\u3068\u3063\u3066\u91cd\u8981\u306a\u60c5\u5831\u304c\u96c6\u7d04\u3055\u308c\u3066\u3044\u308b\u3002<\/p>\n<p>\u4e00\u65b9\u3067\u3001sudo \u30b3\u30de\u30f3\u30c9\u306e\u4f7f\u7528\u5c65\u6b74\u3082\u540c\u3058\u304f auth.log \u306b\u51fa\u529b\u3055\u308c\u308b\u3002\u30b7\u30f3\u30b0\u30eb\u30e6\u30fc\u30b6\u30fc\u306e\u3088\u3046\u306a\u74b0\u5883\u3067\u306f\u3001sudo \u306e\u5b9f\u884c\u5c65\u6b74\u306f\u30b7\u30b9\u30c6\u30e0\u7684\u306a\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u76e3\u67fb\u3088\u308a\u3082\u65e5\u5e38\u4f5c\u696d\u306e\u64cd\u4f5c\u30ed\u30b0\u306b\u8fd1\u3044\u6027\u8cea\u3092\u6301\u3064\u3002<\/p>\n<p>\u305d\u306e\u305f\u3081 auth.log \u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u60c5\u5831\u3068 sudo \u306e\u5229\u7528\u8a18\u9332\u3092\u5206\u96e2\u3057\u305f\u65b9\u304c\u30ed\u30b0\u306e\u6027\u8cea\u304c\u660e\u78ba\u306b\u306a\u308a auth.log \u306e\u76e3\u8996\u306b\u5bc4\u4e0e\u3059\u308b\u306e\u3067\u306f\u306a\u3044\u304b\u3068\u8003\u3048\u3001\u3053\u308c\u3089\u306e\u60c5\u5831\u3092\u5206\u96e2\u3059\u308b\u8a2d\u5b9a\u3092\u691c\u8a0e\u3059\u308b\u3053\u3068\u306b\u3057\u305f\u3002<\/p>\n<hr>\n<h2>\n\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u8a2d\u5b9a\u306b\u3064\u3044\u3066\u306e\u8a66\u884c<br \/>\n<\/h2>\n<p>\u307e\u305a \/etc\/sudoers.d\/90-logging \u3092\u4f5c\u6210\u3057\u3001\u4ee5\u4e0b\u306e 2 \u884c\u3092\u8a18\u8ff0\u3057\u305f\u3002<\/p>\n<div class=\"codecolorer-container text geshi\" style=\"overflow:auto;white-space:nowrap;width:1000px;\"><table cellspacing=\"0\" cellpadding=\"0\"><tbody><tr><td class=\"line-numbers\"><div>1<br \/>2<br \/><\/div><\/td><td><div class=\"text codecolorer\" style=\"white-space:nowrap\">Defaults logfile=\u201c\/var\/log\/sudo.log\u201d<br \/>\nDefaults !syslog<\/div><\/td><\/tr><\/tbody><\/table><\/div>\n<p>\u3053\u308c\u306b\u3088\u308a sudo \u306e\u30ed\u30b0\u306f\u5c02\u7528\u306e \/var\/log\/sudo.log \u306b\u306e\u307f\u51fa\u529b\u3055\u308c\u3001auth.log \u306b\u306f\u8a18\u9332\u3055\u308c\u306a\u304f\u306a\u308b\u3002<\/p>\n<p>\u3055\u3089\u306b\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u8003\u616e\u3057 \/etc\/logrotate.d\/rsyslog \u306b\u5023\u3063\u3066 \/etc\/logrotate.d\/sudo \u3092\u7528\u610f\u3057\u305f\u3002<\/p>\n<div class=\"codecolorer-container text geshi\" style=\"overflow:auto;white-space:nowrap;width:1000px;\"><table cellspacing=\"0\" cellpadding=\"0\"><tbody><tr><td class=\"line-numbers\"><div>1<br \/>2<br \/>3<br \/>4<br \/>5<br \/>6<br \/>7<br \/>8<br \/>9<br \/>10<br \/>11<br \/>12<br \/>13<br \/><\/div><\/td><td><div class=\"text codecolorer\" style=\"white-space:nowrap\">\/var\/log\/sudo.log<br \/>\n{<br \/>\n&nbsp; &nbsp; &nbsp; &nbsp; rotate 12<br \/>\n&nbsp; &nbsp; &nbsp; &nbsp; weekly<br \/>\n&nbsp; &nbsp; &nbsp; &nbsp; missingok<br \/>\n&nbsp; &nbsp; &nbsp; &nbsp; notifempty<br \/>\n&nbsp; &nbsp; &nbsp; &nbsp; compress<br \/>\n&nbsp; &nbsp; &nbsp; &nbsp; delaycompress<br \/>\n&nbsp; &nbsp; &nbsp; &nbsp; sharedscripts<br \/>\n&nbsp; &nbsp; &nbsp; &nbsp; postrotate<br \/>\n&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; \/usr\/lib\/rsyslog\/rsyslog-rotate<br \/>\n&nbsp; &nbsp; &nbsp; &nbsp; endscript<br \/>\n}<\/div><\/td><\/tr><\/tbody><\/table><\/div>\n<p>\u3053\u308c\u3067 sudo.log \u306f\u9031\u6b21\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u3055\u308c\u3001\u6700\u5927\u3067\u7d04 3 \u30f6\u6708\u5206\u3092\u4fdd\u6301\u3059\u308b\u904b\u7528\u3068\u3057\u305f\u3002<\/p>\n<hr>\n<h2>\n\u89b3\u6e2c\u3068\u305d\u306e\u7d50\u679c<br \/>\n<\/h2>\n<p>\u6570\u65e5\u9593\u3053\u306e\u69cb\u6210\u3067\u904b\u7528\u3057\u3066\u3001\u5b9f\u969b\u306e\u30ed\u30b0\u4ef6\u6570\u3092\u78ba\u8a8d\u3057\u305f\u3002<\/p>\n<ul>\n<li>auth.log: \u7d04 20,000 \u884c\n<\/li>\n<li>sudo.log: \u7d04 500 \u884c<\/li>\n<\/ul>\n<p>auth.log \u304b\u3089 sudo \u306e\u8a18\u9332\u306f\u5b8c\u5168\u306b\u6d88\u3048\u3001\u5206\u96e2\u306f\u610f\u56f3\u901a\u308a\u6210\u529f\u3057\u305f\u3002\u3057\u304b\u3057\u89b3\u6e2c\u306e\u7d50\u679c\u3001sudo \u306e\u30ed\u30b0\u306f\u5168\u4f53\u306e 2.5% \u306b\u904e\u304e\u306a\u304b\u3063\u305f\u3002 auth.log \u3092\u5927\u304d\u304f\u3057\u3066\u3044\u305f\u306e\u306f sshd \u306e\u30ed\u30b0\u30a4\u30f3\u8a66\u884c\u3084 PAM \u306e\u8a8d\u8a3c\u5931\u6557\u306a\u3069\u3067\u3042\u308a\u3001sudo \u5206\u96e2\u306e\u52b9\u679c\u306f\u9650\u5b9a\u7684\u3067\u3042\u308b\u3053\u3068\u304c\u5206\u304b\u3063\u305f\u3002<\/p>\n<hr>\n<h2>\n\u8a55\u4fa1<br \/>\n<\/h2>\n<p>\u4eca\u56de\u306e\u8a66\u884c\u306b\u3088\u3063\u3066\u3001\u4ee5\u4e0b\u306e\u77e5\u898b\u3092\u5f97\u305f\u3002<\/p>\n<ul>\n<li>Defaults logfile= \u3068 Defaults !syslog \u3092\u4f75\u7528\u3059\u308b\u3053\u3068\u3067\u3001sudo \u30ed\u30b0\u3092\u5b8c\u5168\u306b syslog \u304b\u3089\u5206\u96e2\u3067\u304d\u308b\u3002\n<\/li>\n<li>\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u8a2d\u5b9a\u3059\u308c\u3070\u3001\u72ec\u7acb\u3057\u305f\u30d5\u30a1\u30a4\u30eb\u3068\u3057\u3066\u5341\u5206\u306b\u7ba1\u7406\u53ef\u80fd\u3002\n<\/li>\n<li>\u3057\u304b\u3057\u5b9f\u969b\u306e\u74b0\u5883\u3067\u306f sudo \u306e\u30ed\u30b0\u306f\u5168\u4f53\u306e\u3054\u304f\u4e00\u90e8\u3067\u3042\u308a\u3001auth.log \u306e\u80a5\u5927\u5316\u8981\u56e0\u306f\u5225\u306b\u3042\u3063\u305f\u3002\n<\/li>\n<li>\u76e3\u67fb\u8981\u4ef6\u3084\u30dd\u30ea\u30b7\u30fc\u4e0a\u306e\u5fc5\u8981\u6027\u304c\u306a\u3044\u9650\u308a\u3001\u5206\u96e2\u306e\u30e1\u30ea\u30c3\u30c8\u306f\u5c0f\u3055\u3044\u3002<\/li>\n<\/ul>\n<p>\u305d\u306e\u305f\u3081\u3001\u6700\u7d42\u7684\u306b\u306f\u3053\u306e\u8a2d\u5b9a\u3092\u63a1\u7528\u305b\u305a\u3001\u5f93\u6765\u3069\u304a\u308a sudo \u30ed\u30b0\u3082 auth.log \u306b\u542b\u3081\u308b\u65b9\u91dd\u306b\u623b\u3057\u305f\u3002<\/p>\n<hr>\n<h2>\n\u7d50\u8ad6\u3068\u307e\u3068\u3081<br \/>\n<\/h2>\n<ul>\n<li>sudo \u30ed\u30b0\u306e\u5206\u96e2\u306f\u6280\u8853\u7684\u306b\u5bb9\u6613\u3067\u3042\u308a\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u6709\u52b9\u306a\u624b\u6bb5\u3067\u3042\u308b\u3002\n<\/li>\n<li>\u3057\u304b\u3057\u305d\u306e\u30c7\u30fc\u30bf\u91cf\u304b\u3089 auth.log \u3068 sudo.log \u3092\u5206\u3051\u308b\u52b9\u679c\u306f\u9650\u5b9a\u7684\u3060\u3063\u305f\u3002\n<\/li>\n<li>\u4eca\u56de\u306f\u63a1\u7528\u3092\u898b\u9001\u3063\u305f\u304c\u3001\u691c\u8a0e\u304b\u3089\u8a66\u884c\u3001\u89b3\u6e2c\u3001\u8a55\u4fa1\u307e\u3067\u3092\u7d4c\u3066\u5f97\u305f\u77e5\u898b\u306f\u3001\u5c06\u6765\u306e\u904b\u7528\u3084\u4ed6\u306e\u74b0\u5883\u306b\u5fdc\u7528\u3067\u304d\u308b\u3068\u8003\u3048\u308b\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u60c5\u5831\u5206\u96e2\u306e\u691c\u8a0e \u65e5\u5e38\u7684\u306b\u78ba\u8a8d\u3057\u3066\u3044\u308b \/var\/log\/auth.log \u306b\u306f\u3001ssh \u30ed\u30b0\u30a4\u30f3\u306e\u6210\u529f\u30fb\u5931\u6557\u3084\u3001su \u306e\u5229\u7528\u3001PAM \u3092\u901a\u3058\u305f\u8a8d\u8a3c\u30a4\u30d9\u30f3\u30c8\u306a\u3069\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u76e3\u67fb\u306b\u3068\u3063\u3066\u91cd\u8981\u306a\u60c5\u5831\u304c\u96c6\u7d04\u3055\u308c\u3066\u3044\u308b\u3002 \u4e00\u65b9\u3067 &#8230; <a title=\"sudo \u30b3\u30de\u30f3\u30c9\u306e\u5b9f\u884c\u5c65\u6b74\u3092 auth.log \u304b\u3089\u5206\u96e2\u3059\u308b\" class=\"read-more\" href=\"https:\/\/blog.id774.net\/entry\/2025\/09\/29\/3005\/\" aria-label=\"sudo \u30b3\u30de\u30f3\u30c9\u306e\u5b9f\u884c\u5c65\u6b74\u3092 auth.log \u304b\u3089\u5206\u96e2\u3059\u308b \u306b\u3064\u3044\u3066\u3055\u3089\u306b\u8aad\u3080\">\u7d9a\u304d\u3092\u8aad\u3080<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[],"class_list":["post-3005","post","type-post","status-publish","format-standard","hentry","category-tech"],"_links":{"self":[{"href":"https:\/\/blog.id774.net\/entry\/wp-json\/wp\/v2\/posts\/3005","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.id774.net\/entry\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.id774.net\/entry\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.id774.net\/entry\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.id774.net\/entry\/wp-json\/wp\/v2\/comments?post=3005"}],"version-history":[{"count":1,"href":"https:\/\/blog.id774.net\/entry\/wp-json\/wp\/v2\/posts\/3005\/revisions"}],"predecessor-version":[{"id":3006,"href":"https:\/\/blog.id774.net\/entry\/wp-json\/wp\/v2\/posts\/3005\/revisions\/3006"}],"wp:attachment":[{"href":"https:\/\/blog.id774.net\/entry\/wp-json\/wp\/v2\/media?parent=3005"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.id774.net\/entry\/wp-json\/wp\/v2\/categories?post=3005"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.id774.net\/entry\/wp-json\/wp\/v2\/tags?post=3005"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}