{"id":229,"date":"2019-11-30T16:34:32","date_gmt":"2019-11-30T16:34:32","guid":{"rendered":"http:\/\/snehpatel.com\/?p=229"},"modified":"2019-11-30T16:34:32","modified_gmt":"2019-11-30T16:34:32","slug":"information-banner-on-ubuntu","status":"publish","type":"post","link":"https:\/\/snehpatel.com\/index.php\/2019\/11\/30\/information-banner-on-ubuntu\/","title":{"rendered":"Information Banner on Ubuntu"},"content":{"rendered":"\n<p>This is the week I am writing about something that very common, and the reason behind this post is that I was running out of time to work on new stuff I found interesting. But keep the promise for the next post I will bring something interesting. Lets start.<\/p>\n\n\n\n<p>Searching through the Linux file system I came across an ssh login banner. Wondering on how-tos, stuck me upon this post. It is simple as a warning message before the user login to the system.<\/p>\n\n\n\n<p>Note:\u00a0Tested\u00a0on\u00a0Ubuntu<br><\/p>\n\n\n\n<p>How\u00a0to\u00a0do\u00a0it? <\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Let&#8217;s make a file named issue.net. FYI you can name it anything.<\/li><\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>vi \/etc\/issue.net<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\"><li> Type\u00a0the\u00a0message\u00a0you\u00a0want\u00a0to\u00a0display.<\/li><\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>ALERT! You are entering into a secured area! Your IP, Login Time, Username has been noted and has been sent to the server administrator!\nThis service is restricted to authorized users only. All activities on this system are logged. Unauthorized access will be fully investigated and reported to the appropriate law enforcement agencies.<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\"><li> Open an\u00a0ssh\u00a0configuration file.<\/li><\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>vi \/etc\/ssh\/sshd_config<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\"><li>Look for the word &#8220;Banner&#8221; and uncomment it and set path to issue.net file.<\/li><\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>Banner \/etc\/issue.net<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\"><li>Now restart the ssh daemon.<\/li><\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo \/etc\/init.d\/sshd restart<\/code><\/pre>\n\n\n\n<p>Now the other most obvious thing that I am unwillingly willing to write about is to display banner after user login.<\/p>\n\n\n\n<p>Here is How to do it?<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Go to directory \/etc\/update-motd.d\/.<\/li><\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>cd \/etc\/update-motd.d<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\"><li>Add new file caller 01-custom.<\/li><\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>vi 01-custom<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\"><li>Add content in it. Remember this will be in script format.<\/li><\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>echo \"This is banner\"<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\"><li>Make the script executable.<\/li><\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo chmod +x \/etc\/update-motd.d\/01-custom<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\"><li>Remember you can always change default scripts as well. Just poke around.<\/li><\/ul>\n\n\n\n<p>Reference <\/p>\n\n\n\n<p><a href=\"https:\/\/www.shellhacks.com\/setup-warning-message-banner-ssh\/\">https:\/\/www.shellhacks.com\/setup-warning-message-banner-ssh\/<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/linuxconfig.org\/how-to-change-welcome-message-motd-on-ubuntu-18-04-server\">https:\/\/linuxconfig.org\/how-to-change-welcome-message-motd-on-ubuntu-18-04-server<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.tecmint.com\/protect-ssh-logins-with-ssh-motd-banner-messages\">https:\/\/www.tecmint.com\/protect-ssh-logins-with-ssh-motd -banner-message<\/a>s<\/p>\n\n\n\n<p>For help with any Linux project: x786@protonmail.ch<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This is the week I am writing about something that very common, and the reason behind this post is that I was running out of time to work on new stuff I found interesting. But keep the promise for the next post I will bring something interesting. Lets start. Searching through the Linux file system &#8230; <a title=\"Information Banner on Ubuntu\" class=\"read-more\" href=\"https:\/\/snehpatel.com\/index.php\/2019\/11\/30\/information-banner-on-ubuntu\/\" aria-label=\"Read more about Information Banner on Ubuntu\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[17,9],"tags":[23],"class_list":["post-229","post","type-post","status-publish","format-standard","hentry","category-linux","category-systme","tag-banner"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Information Banner on Ubuntu - Sneh Patel<\/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:\/\/snehpatel.com\/index.php\/2019\/11\/30\/information-banner-on-ubuntu\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Information Banner on Ubuntu - Sneh Patel\" \/>\n<meta property=\"og:description\" content=\"This is the week I am writing about something that very common, and the reason behind this post is that I was running out of time to work on new stuff I found interesting. 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