{"id":37892,"date":"2019-10-31T22:20:24","date_gmt":"2019-10-31T19:20:24","guid":{"rendered":"https:\/\/prohoster.info\/blog\/mozilla-perehodit-k-vklyucheniyu-po-umolchaniyu-dns-over-https-v-firefox\/"},"modified":"2019-10-31T22:20:24","modified_gmt":"2019-10-31T19:20:24","slug":"mozilla-perehodit-k-vklyucheniyu-po-umolchaniyu-dns-over-https-v-firefox","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/mozilla-perehodit-k-vklyucheniyu-po-umolchaniyu-dns-over-https-v-firefox","title":{"rendered":"Mozilla sta iniziando a includere per default DNS-over-HTTPS in Firefox","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Sviluppatori di Firefox <noindex><a rel=\"nofollow\" href=\"https:\/\/blog.mozilla.org\/futurereleases\/2019\/09\/06\/whats-next-in-making-dns-over-https-the-default\/\">hanno annunciato<\/a><\/noindex> sulla conclusione dei test per il supporto DNS su HTTPS (DoH, DNS over HTTPS) e l'intenzione di attivare questa tecnologia per impostazione predefinita per gli utenti negli Stati Uniti a fine settembre. L'attivazione avverr\u00e0 gradualmente, inizialmente per una piccola percentuale di utenti, aumentando progressivamente fino al 100% in assenza di problemi. Dopo aver raggiunto gli Stati Uniti, si valuter\u00e0 la possibilit\u00e0 di attivare DoH anche in altri paesi.<\/p>\n<p>I test condotti nel corso dell'anno hanno dimostrato l'affidabilit\u00e0 e le buone prestazioni del servizio, e hanno anche permesso di identificare alcune situazioni in cui DoH pu\u00f2 causare problemi, sviluppando soluzioni per evitarli (ad esempio, sono stati analizzati <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=50448\">i problemi<\/a><\/noindex> l'ottimizzazione del traffico nelle reti di distribuzione dei contenuti, il controllo parentale e le zone DNS interne aziendali). <\/p>\n<p>L'importanza della crittografia del traffico DNS \u00e8 considerata un fattore fondamentale per la protezione degli utenti; per questo motivo, \u00e8 stato deciso di abilitare DoH per impostazione predefinita, inizialmente solo per gli utenti negli Stati Uniti. Dopo l'attivazione di DoH, verr\u00e0 mostrato un avviso all'utente che consentir\u00e0, se lo desidera, di rinunciare all'accesso ai server DNS DoH centralizzati e tornare al tradizionale schema di invio di richieste non crittografate ai server DNS del provider (a differenza dell'infrastruttura distribuita dei resolver DNS, in DoH \u00e8 utilizzato un legame a un determinato servizio DoH, che pu\u00f2 essere considerato come un punto unico di guasto).<\/p>\n<p>Con l'attivazione di DoH, potrebbero verificarsi interferenze nei sistemi di controllo genitori e nelle reti aziendali che utilizzano una struttura di nomi DNS accessibile solo all'interno della rete per la traduzione degli indirizzi intranet e degli host aziendali. Per risolvere i problemi con questi sistemi, \u00e8 stato aggiunto un sistema di controlli che disattiva automaticamente DoH. I controlli vengono eseguiti ad ogni avvio del browser o quando viene rilevato un cambiamento della sottorete.<\/p>\n<p>\u0410\u0432\u0442\u043e\u043c\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u0432\u043e\u0437\u0432\u0440\u0430\u0442 \u043d\u0430 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435  \u0448\u0442\u0430\u0442\u043d\u043e\u0433\u043e \u0440\u0435\u0437\u043e\u043b\u0432\u0435\u0440\u0430 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0442\u0430\u043a\u0436\u0435 \u043f\u0440\u0435\u0434\u0443\u0441\u043c\u043e\u0442\u0440\u0435\u043d \u043f\u0440\u0438 \u0432\u043e\u0437\u043d\u0438\u043a\u043d\u043e\u0432\u0435\u043d\u0438\u0438 \u0441\u0431\u043e\u0435\u0432 \u043f\u0440\u0438 \u0440\u0435\u0437\u043e\u043b\u0432\u0438\u043d\u0433\u0435 \u0447\u0435\u0440\u0435\u0437 DoH (\u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u043f\u0440\u0438 \u043d\u0430\u0440\u0443\u0448\u0435\u043d\u0438\u0438 \u0441\u0435\u0442\u0435\u0432\u043e\u0439 \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u043e\u0441\u0442\u0438 \u0441 \u043f\u0440\u043e\u0432\u0430\u0439\u0434\u0435\u0440\u043e\u043c DoH \u0438\u043b\u0438 \u0432\u043e\u0437\u043d\u0438\u043a\u043d\u043e\u0432\u0435\u043d\u0438\u0438 \u0441\u0431\u043e\u0435\u0432 \u0432 \u0435\u0433\u043e \u0438\u043d\u0444\u0440\u0430\u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u0435). \u0421\u043c\u044b\u0441\u043b \u043f\u043e\u0434\u043e\u0431\u043d\u044b\u0445 \u043f\u0440\u043e\u0432\u0435\u0440\u043e\u043a \u0441\u043e\u043c\u043d\u0438\u0442\u0435\u043b\u0435\u043d, \u0442\u0430\u043a \u043a\u0430\u043a \u043d\u0438\u043a\u0442\u043e \u043d\u0435 \u043c\u0435\u0448\u0430\u0435\u0442 \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0438\u043c, \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u0438\u0440\u0443\u044e\u0449\u0438\u043c \u0440\u0430\u0431\u043e\u0442\u0443 \u0440\u0435\u0437\u043e\u043b\u0432\u0435\u0440\u0430 \u0438\u043b\u0438 \u0441\u043f\u043e\u0441\u043e\u0431\u043d\u044b\u043c  \u0432\u043c\u0435\u0448\u0430\u0442\u044c\u0441\u044f \u0432 \u0442\u0440\u0430\u0444\u0438\u043a, \u0441\u0438\u043c\u0443\u043b\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u043f\u043e\u0434\u043e\u0431\u043d\u043e\u0435 \u043f\u043e\u0432\u0435\u0434\u0435\u043d\u0438\u0435 \u0434\u043b\u044f \u043e\u0442\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u0448\u0438\u0444\u0440\u043e\u0432\u0430\u043d\u0438\u044f DNS-\u0442\u0440\u0430\u0444\u0438\u043a\u0430. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0440\u0435\u0448\u0435\u043d\u0430 \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u0438\u0435\u043c \u0432 \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0438 \u043f\u0443\u043d\u043a\u0442\u0430 &#171;DoH always&#187; (\u043f\u043e \u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u043d\u0435 \u0430\u043a\u0442\u0438\u0432\u0435\u043d), \u043f\u0440\u0438 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0435 \u043a\u043e\u0442\u043e\u0440\u043e\u0433\u043e \u0430\u0432\u0442\u043e\u043c\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u043e\u0435 \u043e\u0442\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0435 \u043d\u0435 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u0442\u0441\u044f, \u0447\u0442\u043e \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0440\u0430\u0437\u0443\u043c\u043d\u044b\u043c \u043a\u043e\u043c\u043f\u0440\u043e\u043c\u0438\u0441\u0441\u043e\u043c.<\/p>\n<p>Per identificare i resolver aziendali, vengono effettuati controlli su domini di primo livello (TLD) non comuni e il resolver di sistema restituisce indirizzi intranet. Per determinare l'attivazione del controllo parentale, si tenta di risolvere il nome exampleadultsite.com e se il risultato non corrisponde all'IP effettivo, si considera che sia attiva la blocco dei contenuti per adulti a livello DNS. Vengono inoltre controllati come segnali gli indirizzi IP di Google e YouTube per verificare la sostituzione con restrict.youtube.com, forcesafesearch.google.com e restrictmoderate.youtube.com. Inoltre Mozilla <noindex><a rel=\"nofollow\" href=\"https:\/\/support.mozilla.org\/en-US\/kb\/configuring-networks-disable-dns-over-https\">offre<\/a><\/noindex> implementare un host di verifica unificato <noindex><a rel=\"nofollow\" href=\"https:\/\/use-application-dns.net\/\">use-application-dns.net<\/a><\/noindex>, che possono utilizzare i provider di servizi Internet e i servizi di controllo parentale come etichetta per disabilitare DoH (se l'host non \u00e8 riconosciuto, Firefox disabilita DoH).<\/p>\n<p>L'utilizzo di un servizio DoH centralizzato pu\u00f2 anche comportare problemi nell'ottimizzazione del traffico nelle reti di distribuzione dei contenuti, che eseguono il bilanciamento del traffico utilizzando DNS (il server DNS della rete CDN genera una risposta considerando l'indirizzo del resolver e fornisce l'host pi\u00f9 vicino per il recupero del contenuto). L'invio di una richiesta DNS dal resolver pi\u00f9 vicino all'utente in tali CDN porta al ritorno dell'indirizzo dell'host pi\u00f9 vicino all'utente, ma l'invio di una richiesta DNS da un resolver centralizzato fornir\u00e0 l'indirizzo dell'host pi\u00f9 vicino al server DNS-over-HTTPS. Test pratici hanno dimostrato che l'applicazione di DNS-over-HTTP con l'utilizzo di CDN raramente comportava ritardi all'inizio della trasmissione dei contenuti (per connessioni veloci, i ritardi non superavano i 10 millisecondi, mentre su canali di comunicazione pi\u00f9 lenti si osservava persino un'accelerazione delle prestazioni). Per trasmettere al resolver CDN informazioni sulla posizione del cliente, \u00e8 stata anche considerata l'applicazione dell'estensione EDNS Client Subnet.<\/p>\n<p>Ricordiamo che DoH pu\u00f2 risultare utile per escludere perdite di informazioni sui nomi host richiesti attraverso i server DNS dei provider, per combattere gli attacchi MITM e la sostituzione del traffico DNS, per contrastare le restrizioni a livello DNS o per organizzare l'operativit\u00e0 in caso di impossibilit\u00e0 a contattare direttamente i server DNS (ad esempio, quando si utilizza un proxy). In una situazione normale, le richieste DNS vengono inviate direttamente ai server DNS specificati nella configurazione di sistema, mentre nel caso del DoH la richiesta per determinare l'indirizzo IP dell'host \u00e8 incapsulata nel traffico HTTPS e inviata a un server HTTP, dove il resolver gestisce le richieste tramite Web API. Lo standard esistente DNSSEC utilizza la crittografia solo per l'autenticazione del cliente e del server, ma non protegge il traffico dall'intercettazione e non garantisce la riservatezza delle richieste. <\/p>\n<p>Per abilitare il DoH in about:config \u00e8 necessario modificare il valore della variabile network.trr.mode, supportata a partire da Firefox 60. Il valore 0 disabilita completamente il DoH; 1 usa DNS o DoH, a seconda di quale sia pi\u00f9 veloce; 2 usa DoH come predefinito, mentre DNS come soluzione di riserva; 3 usa solo DoH; 4 \u00e8 la modalit\u00e0 di specchiamento dove DoH e DNS vengono utilizzati parallelamente. Per impostazione predefinita, viene utilizzato il server DNS di CloudFlare, ma pu\u00f2 essere modificato tramite il parametro network.trr.uri; ad esempio, \u00e8 possibile impostare &#171;https:\/\/dns.google.com\/experimental&#187; oppure &#171;https:\/\/9.9.9.9\/dns-query&#187;.<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Fonte: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51439\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 Firefox \u043e\u0431\u044a\u044f\u0432\u0438\u043b\u0438 \u043e \u0437\u0430\u0432\u0435\u0440\u0448\u0435\u043d\u0438\u0438 \u0442\u0435\u0441\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0438 DNS \u043f\u043e\u0432\u0435\u0440\u0445 HTTPS (DoH, DNS over HTTPS) \u0438 \u043d\u0430\u043c\u0435\u0440\u0435\u043d\u0438\u0438 \u0432 \u043a\u043e\u043d\u0446\u0435 \u0441\u0435\u043d\u0442\u044f\u0431\u0440\u044f \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u044c \u0434\u0430\u043d\u043d\u0443\u044e \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u044e \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u0434\u043b\u044f \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439 \u0438\u0437 \u0421\u0428\u0410. \u0412\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0435 \u0431\u0443\u0434\u0435\u0442 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u044c\u0441\u044f \u043f\u043e\u0441\u0442\u0443\u043f\u0430\u0442\u0435\u043b\u044c\u043d\u043e, \u0432\u043d\u0430\u0447\u0430\u043b\u0435 \u0434\u043b\u044f \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u0438\u0445 \u043f\u0440\u043e\u0446\u0435\u043d\u0442\u043e\u0432 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439, \u0430 \u0432 \u0441\u043b\u0443\u0447\u0430\u0435 \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0438\u044f \u043f\u0440\u043e\u0431\u043b\u0435\u043c \u043f\u043e\u0441\u0442\u0435\u043f\u0435\u043d\u043d\u043e \u0434\u043e\u0432\u043e\u0434\u044f \u0434\u043e 100%. \u041f\u043e\u0441\u043b\u0435 \u043e\u0445\u0432\u0430\u0442\u0430 \u0421\u0428\u0410 \u0431\u0443\u0434\u0435\u0442 \u0440\u0430\u0441\u0441\u043c\u043e\u0442\u0440\u0435\u043d\u0430 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f DoH \u0438 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-37892","post","type-post","status-publish","format-standard","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 Firefox \u043e\u0431\u044a\u044f\u0432\u0438\u043b\u0438 \u043e \u0437\u0430\u0432\u0435\u0440\u0448\u0435\u043d\u0438\u0438 \u0442\u0435\u0441\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0438 DNS \u043f\u043e\u0432\u0435\u0440\u0445 HTTPS (DoH, DNS over HTTPS) \u0438 \u043d\u0430\u043c\u0435\u0440\u0435\u043d\u0438\u0438 \u0432 \u043a\u043e\u043d\u0446\u0435 \u0441\u0435\u043d\u0442\u044f\u0431\u0440\u044f \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u044c \u0434\u0430\u043d\u043d\u0443\u044e \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u044e \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u0434\u043b\u044f \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439 \u0438\u0437 \u0421\u0428\u0410. \u0412\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0435 \u0431\u0443\u0434\u0435\u0442 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u044c\u0441\u044f \u043f\u043e\u0441\u0442\u0443\u043f\u0430\u0442\u0435\u043b\u044c\u043d\u043e, \u0432\u043d\u0430\u0447\u0430\u043b\u0435 \u0434\u043b\u044f \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u0438\u0445 \u043f\u0440\u043e\u0446\u0435\u043d\u0442\u043e\u0432 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439, \u0430 \u0432 \u0441\u043b\u0443\u0447\u0430\u0435 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content=\"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"\ud83e\udd47Mozilla \u043f\u0435\u0440\u0435\u0445\u043e\u0434\u0438\u0442 \u043a \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044e \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e DNS-over-HTTPS \u0432 Firefox | ProHoster\" \/>\n\t\t<meta property=\"og:description\" content=\"\u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 Firefox \u043e\u0431\u044a\u044f\u0432\u0438\u043b\u0438 \u043e \u0437\u0430\u0432\u0435\u0440\u0448\u0435\u043d\u0438\u0438 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