{"id":82,"date":"2022-06-12T20:04:37","date_gmt":"2022-06-12T18:04:37","guid":{"rendered":"https:\/\/schmeken.org\/wordpress\/?p=82"},"modified":"2022-06-17T10:09:26","modified_gmt":"2022-06-17T08:09:26","slug":"ubuntu-freigabe-von-port-53","status":"publish","type":"post","link":"https:\/\/schmeken.org\/wordpress\/2022\/06\/12\/ubuntu-freigabe-von-port-53\/","title":{"rendered":"Freigabe von Port 53"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Wenn Port 53 f\u00fcr einen eigenen DNS Dienst verwendet werden soll, dann scheitert es bei Ubuntu Server meistens an dieser Stelle. Ab Werk verwendet Ubuntu Server bereits Port 53 f\u00fcr den Dienst &#8222;systemd-resolved&#8220;.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Im Assistenten von AdGuard Home erwartet einen z.B. die Fehlermeldung:<br><em><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\"><code>listen tcp 0.0.0.0:53: bind: address already in use<\/code><\/mark><\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Die aktuellen Nutzung von Port 53 kann mit folgendem Befehl gepr\u00fcft werden:<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-bash\" data-lang=\"Bash\"><code>sudo lsof -i :53<\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Als erstes wird die Datei <code><mark style=\"background-color:#7bdcb5\" class=\"has-inline-color has-vivid-red-color\">\/etc\/systemd\/resolved.conf<\/mark><\/code> mit einem Editor (z.B. nano) ge\u00f6ffnet. Dazu werden entsprechende root Rechte ben\u00f6tigt.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Beispiel:<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-plain\"><code>sudo nano \/etc\/systemd\/resolved.conf<\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Die Datei wird nun wie folgt ver\u00e4ndert:<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-plain\"><code>[Resolve]\nDNS=8.8.8.8\n#FallbackDNS=\n#Domains=\n#LLMNR=no\n#MulticastDNS=no\n#DNSSEC=no\n#DNSOverTLS=no\n#Cache=no\nDNSStubListener=no\n#ReadEtcHosts=yes<\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Ist die Datei gespeichert, dann muss sie nur noch in das entsprechende Verzeichnis verlinkt werden.<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-bash\" data-lang=\"Bash\"><code>sudo ln -sf \/run\/systemd\/resolve\/resolv.conf \/etc\/resolv.conf<\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Nach einem Neustart sollte nun auch die T\u00fcr f\u00fcr andere Dienste offen sein, die sich an Port 53 bedienen wollen (z.B. AdGuard Home).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Wenn Port 53 f\u00fcr einen eigenen DNS Dienst verwendet werden soll, dann scheitert es bei Ubuntu Server meistens an dieser Stelle. Ab Werk verwendet Ubuntu Server bereits Port 53 f\u00fcr den Dienst &#8222;systemd-resolved&#8220;. Im Assistenten von AdGuard Home erwartet einen z.B. die Fehlermeldung:listen tcp 0.0.0.0:53: bind: address already in use Die aktuellen Nutzung von Port [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":116,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7,3,8],"tags":[],"class_list":["post-82","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-betriebssystem","category-tech","category-ubuntu-server"],"_links":{"self":[{"href":"https:\/\/schmeken.org\/wordpress\/wp-json\/wp\/v2\/posts\/82","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/schmeken.org\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/schmeken.org\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/schmeken.org\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/schmeken.org\/wordpress\/wp-json\/wp\/v2\/comments?post=82"}],"version-history":[{"count":13,"href":"https:\/\/schmeken.org\/wordpress\/wp-json\/wp\/v2\/posts\/82\/revisions"}],"predecessor-version":[{"id":164,"href":"https:\/\/schmeken.org\/wordpress\/wp-json\/wp\/v2\/posts\/82\/revisions\/164"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/schmeken.org\/wordpress\/wp-json\/wp\/v2\/media\/116"}],"wp:attachment":[{"href":"https:\/\/schmeken.org\/wordpress\/wp-json\/wp\/v2\/media?parent=82"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/schmeken.org\/wordpress\/wp-json\/wp\/v2\/categories?post=82"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/schmeken.org\/wordpress\/wp-json\/wp\/v2\/tags?post=82"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}