{"id":2278,"date":"2023-01-28T10:13:46","date_gmt":"2023-01-28T04:43:46","guid":{"rendered":"https:\/\/trysiteprice.com\/blog\/?p=2278"},"modified":"2023-01-28T10:13:46","modified_gmt":"2023-01-28T04:43:46","slug":"how-to-add-comments-to-iptables-rules-on-linux","status":"publish","type":"post","link":"https:\/\/trysiteprice.com\/blog\/how-to-add-comments-to-iptables-rules-on-linux\/","title":{"rendered":"How to add comments to iptables rules on Linux"},"content":{"rendered":"<p>To add comments to iptables rules on Linux, you can use the <code>-m comment<\/code> option. For example, to add a comment &#8220;Allow SSH&#8221; to an iptables rule that allows incoming traffic on port 22 (the default port for SSH), you can use the following command:<\/p>\n<div class=\"bg-black mb-4 rounded-md\">\n<div class=\"flex items-center relative text-gray-200 bg-gray-800 px-4 py-2 text-xs font-sans\"><\/div>\n<div class=\"p-4 overflow-y-auto\"><code class=\"!whitespace-pre hljs language-css\">iptables -<span class=\"hljs-selector-tag\">A<\/span> <span class=\"hljs-selector-tag\">INPUT<\/span> -<span class=\"hljs-selector-tag\">p<\/span> tcp <span class=\"hljs-attr\">--dport<\/span> <span class=\"hljs-number\">22<\/span> -m comment <span class=\"hljs-attr\">--comment<\/span> \"Allow SSH\" -j ACCEPT<br \/>\n<\/code><\/div>\n<\/div>\n<p>You can also use <code>-j<\/code> option with <code>COMMENT<\/code> to add comments to iptables rules. For example,<\/p>\n<div class=\"bg-black mb-4 rounded-md\">\n<div class=\"flex items-center relative text-gray-200 bg-gray-800 px-4 py-2 text-xs font-sans\"><\/div>\n<div class=\"p-4 overflow-y-auto\"><code class=\"!whitespace-pre hljs language-css\">iptables -<span class=\"hljs-selector-tag\">A<\/span> <span class=\"hljs-selector-tag\">INPUT<\/span> -<span class=\"hljs-selector-tag\">p<\/span> tcp <span class=\"hljs-attr\">--dport<\/span> <span class=\"hljs-number\">22<\/span> -j COMMENT <span class=\"hljs-attr\">--comment<\/span> \"Allow SSH\"<br \/>\n<\/code><\/div>\n<\/div>\n<p>You can also use <code>-j<\/code> option with <code>LOG<\/code> to log the rule and add comments in the log message. For example,<\/p>\n<div class=\"bg-black mb-4 rounded-md\">\n<div class=\"flex items-center relative text-gray-200 bg-gray-800 px-4 py-2 text-xs font-sans\"><\/div>\n<div class=\"p-4 overflow-y-auto\"><code class=\"!whitespace-pre hljs language-css\">iptables -<span class=\"hljs-selector-tag\">A<\/span> <span class=\"hljs-selector-tag\">INPUT<\/span> -<span class=\"hljs-selector-tag\">p<\/span> tcp <span class=\"hljs-attr\">--dport<\/span> <span class=\"hljs-number\">22<\/span> -j LOG <span class=\"hljs-attr\">--log-prefix<\/span> \"SSH: <span class=\"hljs-string\">\"<br \/>\n<\/span><\/code><\/div>\n<\/div>\n<p>You can view the comments by using the <code>iptables -L -v -n<\/code> command.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>To add comments to iptables rules on Linux, you can use the -m comment option. For example, to add a comment &#8220;Allow SSH&#8221; to an iptables rule that allows incoming traffic on port 22 (the default port for SSH), you can use the following command: iptables -A INPUT -p tcp &#8211;dport 22 -m comment &#8211;comment &#8230; <a title=\"How to add comments to iptables rules on Linux\" class=\"read-more\" href=\"https:\/\/trysiteprice.com\/blog\/how-to-add-comments-to-iptables-rules-on-linux\/\" aria-label=\"Read more about How to add comments to iptables rules on Linux\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2278","post","type-post","status-publish","format-standard","hentry","category-best-tutorial"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to add comments to iptables rules on Linux - TrySitePrice<\/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:\/\/trysiteprice.com\/blog\/how-to-add-comments-to-iptables-rules-on-linux\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to add comments to iptables rules on Linux - TrySitePrice\" \/>\n<meta property=\"og:description\" content=\"To add comments to iptables rules on Linux, you can use the -m comment option. For example, to add a comment &#8220;Allow SSH&#8221; to an iptables rule that allows incoming traffic on port 22 (the default port for SSH), you can use the following command: iptables -A INPUT -p tcp --dport 22 -m comment --comment ... 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