{"id":1522,"date":"2023-03-05T18:24:00","date_gmt":"2023-03-05T17:24:00","guid":{"rendered":"https:\/\/alessandromasciadri.com\/?p=1522"},"modified":"2023-03-05T21:46:04","modified_gmt":"2023-03-05T20:46:04","slug":"come-disabilitare-systemd-resolved-su-ubuntu","status":"publish","type":"post","link":"https:\/\/alessandromasciadri.com\/come-disabilitare-systemd-resolved-su-ubuntu\/","title":{"rendered":"Come disabilitare systemd-resolved su Ubuntu"},"content":{"rendered":"\t\t<div data-akihiro-type=\"ama-post\" data-akihiro-id=\"1522\" class=\"akihiro akihiro-1522\" data-akihiro-post-type=\"post\">\n\t\t\t\t<div class=\"akihiro-element akihiro-element-0a8957c e-flex e-con-boxed e-con e-parent\" data-id=\"0a8957c\" data-element_type=\"container\" data-e-type=\"container\" id=\"my-post\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"akihiro-element akihiro-element-7be9c3f akihiro-widget akihiro-widget-text-editor\" data-id=\"7be9c3f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"akihiro-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Questa guida \u00e8 finalizzata alla disattivazione del servizio systemd-resolved sulle macchine Ubuntu. Di solito si sceglie di disabilitare questo servizio quando si vuole installare ed utilizzare un altro resolver sulla macchina host. Per esempio, se si vuole installare ed eseguire PiHole come server DNS sulla propria macchina, sar\u00e0 necessario disattivare preventivamente systemd-resolved.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"akihiro-element akihiro-element-6cc9c6f akihiro-toc--minimized-on-tablet akihiro-widget akihiro-widget-table-of-contents\" data-id=\"6cc9c6f\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;container&quot;:&quot;#my-post&quot;,&quot;exclude_headings_by_selector&quot;:[],&quot;headings_by_tags&quot;:[&quot;h2&quot;,&quot;h3&quot;,&quot;h4&quot;,&quot;h5&quot;,&quot;h6&quot;],&quot;marker_view&quot;:&quot;numbers&quot;,&quot;no_headings_message&quot;:&quot;Non sono state trovate intestazioni in questa pagina.&quot;,&quot;minimize_box&quot;:&quot;yes&quot;,&quot;minimized_on&quot;:&quot;tablet&quot;,&quot;hierarchical_view&quot;:&quot;yes&quot;,&quot;min_height&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"table-of-contents.default\">\n\t\t\t\t<div class=\"akihiro-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"akihiro-toc__header\">\n\t\t\t\t\t\t<h4 class=\"akihiro-toc__header-title\">\n\t\t\t\tTabella dei Contenuti\t\t\t<\/h4>\n\t\t\t\t\t\t\t\t\t\t<div class=\"akihiro-toc__toggle-button akihiro-toc__toggle-button--expand\" role=\"button\" tabindex=\"0\" aria-controls=\"akihiro-toc__6cc9c6f\" aria-expanded=\"true\" aria-label=\"Apri l&#039;indice dei contenuti\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z\"><\/path><\/svg><\/div>\n\t\t\t\t<div class=\"akihiro-toc__toggle-button akihiro-toc__toggle-button--collapse\" role=\"button\" tabindex=\"0\" aria-controls=\"akihiro-toc__6cc9c6f\" aria-expanded=\"true\" aria-label=\"Chiudi l&#039;indice dei contenuti\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-up\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M240.971 130.524l194.343 194.343c9.373 9.373 9.373 24.569 0 33.941l-22.667 22.667c-9.357 9.357-24.522 9.375-33.901.04L224 227.495 69.255 381.516c-9.379 9.335-24.544 9.317-33.901-.04l-22.667-22.667c-9.373-9.373-9.373-24.569 0-33.941L207.03 130.525c9.372-9.373 24.568-9.373 33.941-.001z\"><\/path><\/svg><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<div id=\"akihiro-toc__6cc9c6f\" class=\"akihiro-toc__body\">\n\t\t\t<div class=\"akihiro-toc__spinner-container\">\n\t\t\t\t<svg class=\"akihiro-toc__spinner eicon-animation-spin e-font-icon-svg e-eicon-loading\" aria-hidden=\"true\" viewBox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M500 975V858C696 858 858 696 858 500S696 142 500 142 142 304 142 500H25C25 237 238 25 500 25S975 237 975 500 763 975 500 975Z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"akihiro-element akihiro-element-1f105fb akihiro-widget akihiro-widget-heading\" data-id=\"1f105fb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"akihiro-widget-container\">\n\t\t\t\t\t<h3 class=\"akihiro-heading-title akihiro-size-default\">Cos'\u00e8 systemd-resolved<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"akihiro-element akihiro-element-274a6a8 akihiro-widget akihiro-widget-text-editor\" data-id=\"274a6a8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"akihiro-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Il servizio systemd-resolved fa parte della suite di <a href=\"https:\/\/en.wikipedia.org\/wiki\/Systemd\">systemd<\/a>\u00a0e si occupa della risoluzione dei nomi per le applicazioni locali. \u00c8 importante tenere in considerazione che systemd-resolved \u00e8 installato per default come parte del package systemd.<\/p><p>I seguenti sono i servizi di risoluzione che systemd-resolved ci mette a disposizione:<\/p><ul><li>Domain Name System (DNS, DNSSEC e DNS over TLS)<\/li><li>Multicast DNS<\/li><li>Link-Local Multicast Name Resolution<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"akihiro-element akihiro-element-4fdcb83 akihiro-widget akihiro-widget-heading\" data-id=\"4fdcb83\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"akihiro-widget-container\">\n\t\t\t\t\t<h3 class=\"akihiro-heading-title akihiro-size-default\">Disattivare systemd-resolved<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"akihiro-element akihiro-element-64bcd47 akihiro-widget akihiro-widget-text-editor\" data-id=\"64bcd47\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"akihiro-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Come prima cosa possiamo verificare se sulla porta 53 c&#8217;\u00e8 in ascolto proprio systemd-resolved. Questi due comandi ci aiutano in questa verifica:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"akihiro-element akihiro-element-57901d7 akihiro-widget akihiro-widget-code-highlight\" data-id=\"57901d7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"akihiro-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-bash \">\n\t\t\t\t<code readonly=\"true\" class=\"language-bash\">\n\t\t\t\t\t<xmp>sudo ss -lp \"sport = :domain\"\nsudo lsof -i :53<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"akihiro-element akihiro-element-bacd5f8 akihiro-widget akihiro-widget-text-editor\" data-id=\"bacd5f8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"akihiro-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>A questo punto disabilitiamo il servizio systemd-resolved lanciando i seguenti comandi:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"akihiro-element akihiro-element-4b69677 akihiro-widget akihiro-widget-code-highlight\" data-id=\"4b69677\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"akihiro-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-bash \">\n\t\t\t\t<code readonly=\"true\" class=\"language-bash\">\n\t\t\t\t\t<xmp>sudo systemctl stop systemd-resolved\nsudo systemctl disable systemd-resolved<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"akihiro-element akihiro-element-4b8630e akihiro-widget akihiro-widget-text-editor\" data-id=\"4b8630e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"akihiro-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Se inoltre vogliamo la certezza che al reboot della macchina il servizio non venga riavviato, usiamo il seguente comando per mascherarlo:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"akihiro-element akihiro-element-67625a8 akihiro-widget akihiro-widget-code-highlight\" data-id=\"67625a8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"akihiro-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-bash \">\n\t\t\t\t<code readonly=\"true\" class=\"language-bash\">\n\t\t\t\t\t<xmp>sudo systemctl mask systemd-resolved<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"akihiro-element akihiro-element-42c455e akihiro-widget akihiro-widget-heading\" data-id=\"42c455e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"akihiro-widget-container\">\n\t\t\t\t\t<h3 class=\"akihiro-heading-title akihiro-size-default\">Riattivare systemd-resolved<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"akihiro-element akihiro-element-aea3677 akihiro-widget akihiro-widget-text-editor\" data-id=\"aea3677\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"akihiro-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Per ripristinare il funzionamento di systemd-resolved lanciamo i comandi inversi a quelli che abbiamo utilizzato per disabilitarlo:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"akihiro-element akihiro-element-9c64ad9 akihiro-widget akihiro-widget-code-highlight\" data-id=\"9c64ad9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"akihiro-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-bash \">\n\t\t\t\t<code readonly=\"true\" class=\"language-bash\">\n\t\t\t\t\t<xmp>sudo systemctl unmask systemd-resolved\nsudo systemctl enable systemd-resolved\nsudo systemctl start systemd-resolved<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"akihiro-element akihiro-element-a4a192c akihiro-widget akihiro-widget-text-editor\" data-id=\"a4a192c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"akihiro-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Dobbiamo tenere presente che systemd-resolved \u00e8 una componente importante nel processo di risoluzione dei nomi. Se non si hanno altri servizi DNS propriamente configurati ed in esecuzione ci si imbatter\u00e0 nel tipico errore di Temporary failure in name resolution.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Questa guida \u00e8 finalizzata alla disattivazione del servizio systemd-resolved sulle macchine Ubuntu. Di solito si sceglie di disabilitare questo servizio quando si vuole installare ed utilizzare un altro resolver sulla macchina host. Per esempio, se si vuole installare ed eseguire PiHole come server DNS sulla propria macchina, sar\u00e0 necessario disattivare preventivamente systemd-resolved. Tabella dei Contenuti [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[20,19],"class_list":["post-1522","post","type-post","status-publish","format-standard","hentry","category-sistemistica","tag-linux","tag-ubuntu"],"_links":{"self":[{"href":"https:\/\/alessandromasciadri.com\/ama-json\/wp\/v2\/posts\/1522","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/alessandromasciadri.com\/ama-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/alessandromasciadri.com\/ama-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/alessandromasciadri.com\/ama-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/alessandromasciadri.com\/ama-json\/wp\/v2\/comments?post=1522"}],"version-history":[{"count":10,"href":"https:\/\/alessandromasciadri.com\/ama-json\/wp\/v2\/posts\/1522\/revisions"}],"predecessor-version":[{"id":1537,"href":"https:\/\/alessandromasciadri.com\/ama-json\/wp\/v2\/posts\/1522\/revisions\/1537"}],"wp:attachment":[{"href":"https:\/\/alessandromasciadri.com\/ama-json\/wp\/v2\/media?parent=1522"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/alessandromasciadri.com\/ama-json\/wp\/v2\/categories?post=1522"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/alessandromasciadri.com\/ama-json\/wp\/v2\/tags?post=1522"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}