{"id":2530,"date":"2016-05-30T10:58:23","date_gmt":"2016-05-30T08:58:23","guid":{"rendered":"http:\/\/vrealize.it\/?p=2530"},"modified":"2016-05-31T09:17:33","modified_gmt":"2016-05-31T07:17:33","slug":"login-alarme-fuer-linux","status":"publish","type":"post","link":"https:\/\/vrealize.it\/de\/2016\/05\/30\/login-alarme-fuer-linux\/","title":{"rendered":"Login-Alarme f\u00fcr Linux"},"content":{"rendered":"<p><a href=\"https:\/\/youtu.be\/rmy5PgMOWFg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2541 size-thumbnail\" src=\"http:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-50-12_AM-200x139.png\" alt=\"tb_sc_2016-05-30_10-50-12_AM\" width=\"200\" height=\"139\" srcset=\"https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-50-12_AM-200x140.png 200w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-50-12_AM-600x418.png 600w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-50-12_AM-300x209.png 300w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-50-12_AM-660x460.png 660w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-50-12_AM.png 740w\" sizes=\"auto, (max-width: 200px) 100vw, 200px\" \/><\/a>Angenommen, Sie haben einige Linux-Systeme auf welchen\u00a0root-Login \u00fcber SSH zwar grunds\u00e4tzlich erlaubt ist, aber protokolliert werden sollte. In diesem Artikel beschreibe ich, wie so eine Alarm\u00a0mit Log Insight einzurichten ist.\u00a0Empfohlene (Besserwisser-)Vorgehensweise w\u00e4re: gar kein root-Login zulassen, schon gar nicht mit Passwort, stattdessen Key+Passwort Authentifizierung und sudo-Privileg f\u00fcr einen nicht-root-User. Auch in diesem\u00a0Fall, k\u00f6nnte man Alarme auf sudo-Events nach dem gleichen Muster einrichten.<\/p>\n<h2>1. Installation des Agenten<\/h2>\n<p>Die Logs m\u00fcssen an Log Insight geschickt werden, entweder \u00fcber Syslog oder \u00fcber den Log Insight Agent. Der Agent bietet viele Vorteile (zentrale Konfiguration, Verschl\u00fcsselung) und wird deshalb empfohlen. Die Installation kann so erfolgen:<\/p>\n<p>Auf Ubuntu\/Debian:<\/p>\n<pre class=\"lang:sh decode:true \">curl -o liagent.deb http:\/\/LOGINSIGHT:9000\/api\/v1\/agent\/packages\/types\/deb;\u00a0dpkg -i liagent.deb<\/pre>\n<p>Auf RedHat \/ SUSE:<\/p>\n<pre class=\"lang:sh decode:true\">curl -o liagent.rpm http:\/\/LOGINSIGHT:9000\/api\/v1\/agent\/packages\/types\/rpm;\u00a0rpm -Uvh liagent.rpm<\/pre>\n<p>Nach der Installation des Pakets, sollte lediglich die Adresse des Log Insight Server in der \/etc\/liagent.ini angepasst werden. Man kann sich das Leben auch einfacher machen, und dem existierenden Log Insight Server einen DNS-Alias &#8220;loginsight&#8221; zuweisen. Diese Adresse ist immer vorkonfiguriert.<\/p>\n<h2>2. Content Pack f\u00fcr Linux installieren<\/h2>\n<p>Der Content-Pack ist nicht unbedingt erforderlich, erleichtert aber die Einrichtung der Alarme dadurch, dass wir eine gute Konfiguration f\u00fcr die Agents haben und die relevanten Felder in den Logs schon extrahiert sind:<\/p>\n<p><a href=\"http:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_09-47-20_AM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-2531\" src=\"http:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_09-47-20_AM-600x358.png\" alt=\"tb_sc_2016-05-30_09-47-20_AM\" width=\"600\" height=\"358\" srcset=\"https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_09-47-20_AM-600x358.png 600w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_09-47-20_AM-200x119.png 200w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_09-47-20_AM-768x458.png 768w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_09-47-20_AM-1024x610.png 1024w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_09-47-20_AM-300x179.png 300w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_09-47-20_AM-660x393.png 660w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_09-47-20_AM.png 1626w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/a><\/p>\n<p>Sobald\u00a0der Content-Pack installiert ist, haben wir eine Vorlage f\u00fcr eine Linux Agent-Konfig. Diese Vorlage muss geklont werden sowie einer Gruppe von Systemen zugewiesenn werden:<\/p>\n<p><a href=\"http:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_09-57-29_AM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-2532\" src=\"http:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_09-57-29_AM-600x423.png\" alt=\"tb_sc_2016-05-30_09-57-29_AM\" width=\"600\" height=\"423\" srcset=\"https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_09-57-29_AM-600x423.png 600w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_09-57-29_AM-200x140.png 200w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_09-57-29_AM-768x542.png 768w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_09-57-29_AM-1024x723.png 1024w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_09-57-29_AM-300x212.png 300w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_09-57-29_AM-660x466.png 660w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_09-57-29_AM.png 1349w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/a><\/p>\n<p>Dann brauchen wir noch ein Kriterium f\u00fcr die Agents, die diese Konfiguration benutzen sollten. Der Einfachheit halber w\u00e4hle ich alle Systeme, deren OS nicht mit &#8220;Microsoft&#8221; anf\u00e4ngt:<\/p>\n<p><a href=\"http:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-00-08_AM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-2533\" src=\"http:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-00-08_AM-600x215.png\" alt=\"tb_sc_2016-05-30_10-00-08_AM\" width=\"600\" height=\"215\" srcset=\"https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-00-08_AM-600x215.png 600w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-00-08_AM-200x72.png 200w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-00-08_AM-768x275.png 768w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-00-08_AM-1024x367.png 1024w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-00-08_AM-300x107.png 300w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-00-08_AM-660x236.png 660w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-00-08_AM.png 1259w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/a><\/p>\n<p>Mit &#8220;Refresh&#8221; kann man kontrollieren, ob tats\u00e4chlich alle Linux-Systeme mit Agenten ausgew\u00e4hlt wurden. Die Gruppenkonfiguration muss mit &#8220;Save&#8221; gespeichert werden.<\/p>\n<h2>3. Linux Dashboards und relevante Suchen<\/h2>\n<p>Sobald der Content Pack installiert ist und die Agenten die Daten liefern, haben wir einige Dashboards: auch f\u00fcr SSH und sudo Events:<\/p>\n<p><a href=\"http:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-11-44_AM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-2535\" src=\"http:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-11-44_AM-600x304.png\" alt=\"tb_sc_2016-05-30_10-11-44_AM\" width=\"600\" height=\"304\" srcset=\"https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-11-44_AM-600x304.png 600w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-11-44_AM-200x101.png 200w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-11-44_AM-768x389.png 768w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-11-44_AM-1024x518.png 1024w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-11-44_AM-300x152.png 300w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-11-44_AM-660x334.png 660w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-11-44_AM.png 1830w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/a><\/p>\n<p>Nun k\u00f6nnen wir die Suchen, die f\u00fcr die Dashboard verwendet wurden, auch in Interactive Analytics \u00f6ffnen:<\/p>\n<p><a href=\"http:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-14-12_AM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-2536\" src=\"http:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-14-12_AM-577x600.png\" alt=\"tb_sc_2016-05-30_10-14-12_AM\" width=\"577\" height=\"600\" srcset=\"https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-14-12_AM-577x600.png 577w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-14-12_AM-192x200.png 192w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-14-12_AM-768x798.png 768w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-14-12_AM-300x312.png 300w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-14-12_AM-660x686.png 660w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-14-12_AM.png 769w\" sizes=\"auto, (max-width: 577px) 100vw, 577px\" \/><\/a><\/p>\n<p>Nun haben wir ja schon fast die Suche, die wir wollten. Um eine Alarmflut vorzubeugen, k\u00f6nnen wir diese zus\u00e4tzlich auf bestimmte Hosts einschr\u00e4nken:<\/p>\n<p><a href=\"http:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-18-16_AM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-2537\" src=\"http:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-18-16_AM-600x440.png\" alt=\"tb_sc_2016-05-30_10-18-16_AM\" width=\"600\" height=\"440\" srcset=\"https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-18-16_AM-600x440.png 600w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-18-16_AM-200x147.png 200w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-18-16_AM-768x564.png 768w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-18-16_AM-1024x751.png 1024w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-18-16_AM-300x220.png 300w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-18-16_AM-660x484.png 660w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-18-16_AM.png 1033w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/a><\/p>\n<h2>4. Alert erstellen<\/h2>\n<p>Sobald die Suche erstellt ist, brauchen wir nur noch auf die rote Glocke zu klicken,\u00a0um\u00a0einen Alarm zu erstellen:<\/p>\n<p><a href=\"http:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-27-27_AM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-2538\" src=\"http:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-27-27_AM-600x226.png\" alt=\"tb_sc_2016-05-30_10-27-27_AM\" width=\"600\" height=\"226\" srcset=\"https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-27-27_AM-600x226.png 600w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-27-27_AM-200x75.png 200w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-27-27_AM-768x290.png 768w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-27-27_AM-1024x386.png 1024w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-27-27_AM-300x113.png 300w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-27-27_AM-660x249.png 660w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-27-27_AM.png 1281w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/a><\/p>\n<p>Die Alerts k\u00f6nnen an vRealize Operation weitergeleitet, als Email oder als Webhook verschickt werden. Der Einfachheit halber, w\u00e4hle ich Email. Nach einem login als root auf dem vrops und \u00a0einigen Minuten erhalte ich folgende Mail:<\/p>\n<p><a href=\"http:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-38-57_AM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-2539\" src=\"http:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-38-57_AM-600x294.png\" alt=\"tb_sc_2016-05-30_10-38-57_AM\" width=\"600\" height=\"294\" srcset=\"https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-38-57_AM-600x294.png 600w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-38-57_AM-200x98.png 200w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-38-57_AM-300x147.png 300w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-38-57_AM-660x324.png 660w, https:\/\/vrealize.it\/wp-content\/uploads\/2016\/05\/tb_sc_2016-05-30_10-38-57_AM.png 756w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>Wir k\u00f6nnten die Alerts weiter einschr\u00e4nken, z.B. eigene Arbeitsstation von dem Alert ausschliessen (denn wir wissen ja, was wir tun). Analog zu dieser Vorgehensweise k\u00f6nnen wir auch Alerts f\u00fcr &#8220;failed logins&#8221; erstellen (z.B. um alarmiert zu werden, wenn auf einem System mehr als X Login-Versuche stattfinden. Interessant sind auch sudo \/ su events.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Angenommen, Sie haben einige Linux-Systeme auf welchen\u00a0root-Login \u00fcber SSH zwar grunds\u00e4tzlich erlaubt ist, aber protokolliert werden sollte. In diesem Artikel beschreibe ich, wie so eine Alarm\u00a0mit Log Insight einzurichten ist.\u00a0Empfohlene (Besserwisser-)Vorgehensweise w\u00e4re: gar kein root-Login zulassen, schon gar nicht mit Passwort, stattdessen Key+Passwort Authentifizierung und sudo-Privileg f\u00fcr einen nicht-root-User. Auch in diesem\u00a0Fall, k\u00f6nnte man Alarme\u2026 <span class=\"read-more\"><a href=\"https:\/\/vrealize.it\/de\/2016\/05\/30\/login-alarme-fuer-linux\/\">Weiterlesen &raquo;<\/a><\/span><\/p>\n","protected":false},"author":3,"featured_media":2541,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[42,11],"tags":[194],"class_list":["post-2530","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-loginsight","category-unkategorisiert","tag-alarm-alert-root-login-ssh-log-insight-logs-security"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Login-Alarme f\u00fcr Linux &#187; vrealize.it - TechBlog VMware SDDC<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/vrealize.it\/de\/2016\/05\/30\/login-alarme-fuer-linux\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Login-Alarme f\u00fcr Linux &#187; vrealize.it - TechBlog VMware SDDC\" \/>\n<meta property=\"og:description\" content=\"Angenommen, Sie haben einige Linux-Systeme auf welchen\u00a0root-Login \u00fcber SSH zwar grunds\u00e4tzlich erlaubt ist, aber protokolliert werden sollte. In diesem Artikel beschreibe ich, wie so eine Alarm\u00a0mit Log Insight einzurichten ist.\u00a0Empfohlene (Besserwisser-)Vorgehensweise w\u00e4re: gar kein root-Login zulassen, schon gar nicht mit Passwort, stattdessen Key+Passwort Authentifizierung und sudo-Privileg f\u00fcr einen nicht-root-User. 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