{"id":12433,"date":"2023-04-20T13:21:59","date_gmt":"2023-04-20T11:21:59","guid":{"rendered":"https:\/\/wp.jochen.hayek.name\/blog-en\/?p=12433"},"modified":"2023-04-20T13:22:01","modified_gmt":"2023-04-20T11:22:01","slug":"testing-ports-telnet-expect-bash-netcat-nmap","status":"publish","type":"post","link":"https:\/\/wp.jochen.hayek.name\/blog-en\/2023\/04\/20\/testing-ports-telnet-expect-bash-netcat-nmap\/","title":{"rendered":"how to test ports \u2013 Telnet, Expect, Bash, Netcat, Nmap"},"content":{"rendered":"\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.redhat.com\/sysadmin\/stop-using-telnet-test-port\">https:\/\/www.redhat.com\/sysadmin\/stop-using-telnet-test-port<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/news.ycombinator.com\/item?id=35621441\">https:\/\/news.ycombinator.com\/item?id=35621441<\/a><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">For &#8220;security reasons&#8221; telnet and nmap are not included in the basic set of utilities present on a production server. And why would you install software, that you usually don&#8217;t need there? But occasionally these tools are needed and should be available for installation. I certainly like telnet and nmap for the described purposes.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>For &#8220;security reasons&#8221; telnet and nmap are not included in the basic set of utilities present on a production server. And why would you install software, that you usually don&#8217;t need there? But occasionally these tools are needed and should be available for installation. I certainly like telnet and nmap for the described purposes.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","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":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":false,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"_share_on_mastodon":"0"},"categories":[306,307,368,671,672,673],"tags":[],"class_list":["post-12433","post","type-post","status-publish","format-standard","hentry","category-linux","category-linux-networking","category-networking","category-unix","category-unix-networking","category-unix_utilities"],"share_on_mastodon":{"url":"","error":""},"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/paO0kP-3ex","jetpack_likes_enabled":true,"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/wp.jochen.hayek.name\/blog-en\/wp-json\/wp\/v2\/posts\/12433","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wp.jochen.hayek.name\/blog-en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wp.jochen.hayek.name\/blog-en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wp.jochen.hayek.name\/blog-en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wp.jochen.hayek.name\/blog-en\/wp-json\/wp\/v2\/comments?post=12433"}],"version-history":[{"count":2,"href":"https:\/\/wp.jochen.hayek.name\/blog-en\/wp-json\/wp\/v2\/posts\/12433\/revisions"}],"predecessor-version":[{"id":12435,"href":"https:\/\/wp.jochen.hayek.name\/blog-en\/wp-json\/wp\/v2\/posts\/12433\/revisions\/12435"}],"wp:attachment":[{"href":"https:\/\/wp.jochen.hayek.name\/blog-en\/wp-json\/wp\/v2\/media?parent=12433"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wp.jochen.hayek.name\/blog-en\/wp-json\/wp\/v2\/categories?post=12433"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wp.jochen.hayek.name\/blog-en\/wp-json\/wp\/v2\/tags?post=12433"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}