{"id":4523,"date":"2021-01-08T09:45:55","date_gmt":"2021-01-07T20:45:55","guid":{"rendered":"http:\/\/www.zoyinc.com\/?p=4523"},"modified":"2021-01-08T09:46:07","modified_gmt":"2021-01-07T20:46:07","slug":"test-dns-connectivity","status":"publish","type":"post","link":"http:\/\/www.zoyinc.com\/?p=4523","title":{"rendered":"Test DNS connectivity"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1500\" height=\"693\" src=\"https:\/\/www.zoyinc.com\/wp-content\/uploads\/2021\/01\/TestDNSConnectivity01.jpg\" alt=\"\" class=\"wp-image-4524\" srcset=\"http:\/\/www.zoyinc.com\/wp-content\/uploads\/2021\/01\/TestDNSConnectivity01.jpg 1500w, http:\/\/www.zoyinc.com\/wp-content\/uploads\/2021\/01\/TestDNSConnectivity01-300x139.jpg 300w, http:\/\/www.zoyinc.com\/wp-content\/uploads\/2021\/01\/TestDNSConnectivity01-150x69.jpg 150w, http:\/\/www.zoyinc.com\/wp-content\/uploads\/2021\/01\/TestDNSConnectivity01-768x355.jpg 768w, http:\/\/www.zoyinc.com\/wp-content\/uploads\/2021\/01\/TestDNSConnectivity01-500x231.jpg 500w\" sizes=\"auto, (max-width: 1500px) 100vw, 1500px\" \/><\/figure>\n\n\n\n<p>I was setting up OKD on a separate VLAN and wanted to used the OKD DNS service but it just wasn&#8217;t working and I felt it was a connectivity\/firewall issue but could not find a tool to test.<\/p>\n\n\n\n<p>I was testing on my Windows 10 desktop connecting to a Fedora DNS server.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Port Query<\/h2>\n\n\n\n<p>I have found and used Port Query UI, PortQryUI, from Microsoft:<\/p>\n\n\n\n<p><a  href=\"https:\/\/www.microsoft.com\/en-us\/download\/details.aspx?id=24009\">https:\/\/www.microsoft.com\/en-us\/download\/details.aspx?id=24009<\/a><\/p>\n\n\n\n<p>DNS works on TCP and\/or UDP port 53 so this is what I tested. This tool does not test DNS works, it tests network connectivity. For me, while the problem was happening, I got back:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"609\" height=\"672\" src=\"https:\/\/www.zoyinc.com\/wp-content\/uploads\/2021\/01\/TestDNSConnectivity02.jpg\" alt=\"\" class=\"wp-image-4526\" srcset=\"http:\/\/www.zoyinc.com\/wp-content\/uploads\/2021\/01\/TestDNSConnectivity02.jpg 609w, http:\/\/www.zoyinc.com\/wp-content\/uploads\/2021\/01\/TestDNSConnectivity02-272x300.jpg 272w, http:\/\/www.zoyinc.com\/wp-content\/uploads\/2021\/01\/TestDNSConnectivity02-136x150.jpg 136w\" sizes=\"auto, (max-width: 609px) 100vw, 609px\" \/><\/figure>\n\n\n\n<p>This lead me to believe it was a firewall issue on the box and after opening up the TCP port it then worked and the query returned:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"627\" height=\"673\" src=\"https:\/\/www.zoyinc.com\/wp-content\/uploads\/2021\/01\/TestDNSConnectivity03.jpg\" alt=\"\" class=\"wp-image-4527\" srcset=\"http:\/\/www.zoyinc.com\/wp-content\/uploads\/2021\/01\/TestDNSConnectivity03.jpg 627w, http:\/\/www.zoyinc.com\/wp-content\/uploads\/2021\/01\/TestDNSConnectivity03-279x300.jpg 279w, http:\/\/www.zoyinc.com\/wp-content\/uploads\/2021\/01\/TestDNSConnectivity03-140x150.jpg 140w\" sizes=\"auto, (max-width: 627px) 100vw, 627px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>I was setting up OKD on a separate VLAN and wanted to used the OKD DNS service but it just wasn&#8217;t working and I felt it was a connectivity\/firewall issue but could not find a tool to test. I was testing on my Windows 10 desktop connecting to a Fedora DNS server. Port Query I [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":4528,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,177,344],"tags":[688,360,352,295,354,691,690,689,427,692,174],"class_list":["post-4523","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-linux","category-microsoft-windows","category-networking","tag-connectivity","tag-dns","tag-firewall","tag-linux","tag-network","tag-port","tag-port-query","tag-portquery","tag-tcp","tag-udp","tag-windows"],"_links":{"self":[{"href":"http:\/\/www.zoyinc.com\/index.php?rest_route=\/wp\/v2\/posts\/4523","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.zoyinc.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.zoyinc.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.zoyinc.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/www.zoyinc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4523"}],"version-history":[{"count":2,"href":"http:\/\/www.zoyinc.com\/index.php?rest_route=\/wp\/v2\/posts\/4523\/revisions"}],"predecessor-version":[{"id":4529,"href":"http:\/\/www.zoyinc.com\/index.php?rest_route=\/wp\/v2\/posts\/4523\/revisions\/4529"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.zoyinc.com\/index.php?rest_route=\/wp\/v2\/media\/4528"}],"wp:attachment":[{"href":"http:\/\/www.zoyinc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4523"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.zoyinc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4523"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.zoyinc.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4523"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}