{"id":348,"date":"2009-01-15T22:19:33","date_gmt":"2009-01-15T21:19:33","guid":{"rendered":"http:\/\/sickel.net\/blogg\/?p=348"},"modified":"2009-01-15T22:19:33","modified_gmt":"2009-01-15T21:19:33","slug":"blocking-bad-users-from-ssh","status":"publish","type":"post","link":"https:\/\/sickel.net\/blogg\/?p=348","title":{"rendered":"Blocking bad users from ssh"},"content":{"rendered":"<p>I noticed a serious pressure from various external users that tried to log into my sshd using a lot of different invalid user names, so I decided to look for a tool keeping those a bit further apart. I came across a version of sshd_sentry.pl from 2004. I had to do some slight updates to make it work on a current debian machine, the script can be found at <a href='http:\/\/sickel.net\/blogg\/wp-content\/2009\/01\/sshd_sentry.pl'>sshd_sentry.pl<\/a>. After that file is adjusted to local use by setting some values on some of the first lines, it can be saved in \/usr\/local\/sbin and automatially started using <a href='http:\/\/sickel.net\/blogg\/wp-content\/2009\/01\/sshd_sentry'>sshd_sentry<\/a><\/p>\n<p>The script looks for multiple failed login attempt or login attempt by suspicious user names and adds the host to hosts.deny.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I noticed a serious pressure from various external users that tried to log into my sshd using a lot of different invalid user names, so I decided to look for a tool keeping those a bit further apart. I came &hellip; <a href=\"https:\/\/sickel.net\/blogg\/?p=348\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-348","post","type-post","status-publish","format-standard","hentry","category-div"],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pnVtD-5C","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/sickel.net\/blogg\/index.php?rest_route=\/wp\/v2\/posts\/348","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sickel.net\/blogg\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sickel.net\/blogg\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sickel.net\/blogg\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/sickel.net\/blogg\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=348"}],"version-history":[{"count":1,"href":"https:\/\/sickel.net\/blogg\/index.php?rest_route=\/wp\/v2\/posts\/348\/revisions"}],"predecessor-version":[{"id":351,"href":"https:\/\/sickel.net\/blogg\/index.php?rest_route=\/wp\/v2\/posts\/348\/revisions\/351"}],"wp:attachment":[{"href":"https:\/\/sickel.net\/blogg\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=348"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sickel.net\/blogg\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=348"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sickel.net\/blogg\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=348"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}