{"id":496,"date":"2022-04-28T09:27:20","date_gmt":"2022-04-28T07:27:20","guid":{"rendered":"https:\/\/blog.beevoip.it\/?p=496"},"modified":"2022-04-28T09:27:21","modified_gmt":"2022-04-28T07:27:21","slug":"nat-e-voip-sip-una-convivenza-difficile-parte-12","status":"publish","type":"post","link":"https:\/\/www.beevoip.it\/blog\/nat-e-voip-sip-una-convivenza-difficile-parte-12\/","title":{"rendered":"NAT E VOIP: Una convivenza difficile &#8211; parte 12"},"content":{"rendered":"\n<p><strong>NAT E VOIP: SOLUZIONI APPLICABILI &#8211; STUN<\/strong><\/p>\n\n\n\n<p><br>STUN richiede che il NAT permetta il passaggio di tutto il traffico diretto alla porta, e che venga inoltrato al client interno.<br>Funziona con il Full-cone NAT e viene bloccato dal symmetric NAT<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"852\" height=\"335\" src=\"https:\/\/blog.beevoip.it\/wp-content\/uploads\/2022\/03\/image-13.png\" alt=\"Funzionamento Server STUN voip\" class=\"wp-image-497\" srcset=\"https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-13.png 852w, https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-13-300x118.png 300w, https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-13-768x302.png 768w, https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-13-696x274.png 696w\" sizes=\"auto, (max-width: 852px) 100vw, 852px\" \/><\/figure>\n\n\n\n<p><strong>NAT E VOIP: SOLUZIONI APPLICABILI &#8211; STUN &#8211; HANDS ON<\/strong><\/p>\n\n\n\n<p><br>Binding response dal server STUN a un telefono Snom<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"837\" height=\"457\" src=\"https:\/\/blog.beevoip.it\/wp-content\/uploads\/2022\/03\/image-14.png\" alt=\"Analisi pacchetto server STUN\" class=\"wp-image-498\" srcset=\"https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-14.png 837w, https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-14-300x164.png 300w, https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-14-768x419.png 768w, https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-14-696x380.png 696w, https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-14-769x420.png 769w\" sizes=\"auto, (max-width: 837px) 100vw, 837px\" \/><\/figure>\n\n\n\n<p><strong>NAT E VOIP: SOLUZIONI APPLICABILI &#8211; STUN &#8211; HANDS ON<\/strong><br><\/p>\n\n\n\n<p>Register del telefono Snom dopo il discovery tramite STUN<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"817\" height=\"447\" src=\"https:\/\/blog.beevoip.it\/wp-content\/uploads\/2022\/03\/image-15.png\" alt=\"Analisi pacchetto server STUN\" class=\"wp-image-499\" srcset=\"https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-15.png 817w, https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-15-300x164.png 300w, https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-15-768x420.png 768w, https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-15-696x381.png 696w\" sizes=\"auto, (max-width: 817px) 100vw, 817px\" \/><\/figure>\n\n\n\n<p><strong>NAT E VOIP: SOLUZIONI APPLICABILI &#8211; STUN &#8211; HANDS ON<\/strong><br><\/p>\n\n\n\n<p>Dopo aver effettuato il discovery tramite STUN il telefono effettua la REGISTER inserendo nell\u2019header Contact IP e porta pubblici.<br>Grazie all\u2019header Contact aggiornato il PBX sar\u00e0 in grado di raggiungere il telefono.<br>Normalmente il telefono effettua le richieste STUN prima di effettuare una REGISTER.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"444\" src=\"https:\/\/blog.beevoip.it\/wp-content\/uploads\/2022\/03\/image-16-1024x444.png\" alt=\"Analisi pacchetto server STUN\" class=\"wp-image-500\" srcset=\"https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-16-1024x444.png 1024w, https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-16-300x130.png 300w, https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-16-768x333.png 768w, https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-16-696x302.png 696w, https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-16-1068x463.png 1068w, https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-16-969x420.png 969w, https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-16.png 1424w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Il discovery del tipo di NAT tramite STUN \u00e8 definito nella <a href=\"https:\/\/datatracker.ietf.org\/doc\/html\/rfc3489\" target=\"_blank\" rel=\"noreferrer noopener\">RFC 3489<\/a><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"690\" height=\"583\" src=\"https:\/\/blog.beevoip.it\/wp-content\/uploads\/2022\/03\/image-17.png\" alt=\"Analisi pacchetto server STUN\" class=\"wp-image-501\" srcset=\"https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-17.png 690w, https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-17-300x253.png 300w, https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-17-497x420.png 497w\" sizes=\"auto, (max-width: 690px) 100vw, 690px\" \/><\/figure>\n\n\n\n<p>No NAT<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"750\" height=\"626\" src=\"https:\/\/blog.beevoip.it\/wp-content\/uploads\/2022\/03\/image-18.png\" alt=\"server STUN senza NAT\" class=\"wp-image-502\" srcset=\"https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-18.png 750w, https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-18-300x250.png 300w, https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-18-696x581.png 696w, https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-18-503x420.png 503w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/figure>\n\n\n\n<p>Full Cone NAT<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"746\" height=\"623\" src=\"https:\/\/blog.beevoip.it\/wp-content\/uploads\/2022\/03\/image-19.png\" alt=\"Nat full cone e server STUN\" class=\"wp-image-503\" srcset=\"https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-19.png 746w, https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-19-300x251.png 300w, https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-19-696x581.png 696w, https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-19-503x420.png 503w\" sizes=\"auto, (max-width: 746px) 100vw, 746px\" \/><\/figure>\n\n\n\n<p>Restricted Cone NAT<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"476\" height=\"695\" src=\"https:\/\/blog.beevoip.it\/wp-content\/uploads\/2022\/03\/image-20.png\" alt=\"Nat restricted cone e server STUN\" class=\"wp-image-504\" srcset=\"https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-20.png 476w, https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-20-205x300.png 205w, https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-20-288x420.png 288w\" sizes=\"auto, (max-width: 476px) 100vw, 476px\" \/><\/figure>\n\n\n\n<p>Port Restricted Cone NAT<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"493\" height=\"703\" src=\"https:\/\/blog.beevoip.it\/wp-content\/uploads\/2022\/03\/image-21.png\" alt=\"Nat port restricted e server STUN\" class=\"wp-image-505\" srcset=\"https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-21.png 493w, https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-21-210x300.png 210w, https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-21-295x420.png 295w\" sizes=\"auto, (max-width: 493px) 100vw, 493px\" \/><\/figure>\n\n\n\n<p>Symmetrical NAT<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"597\" height=\"680\" src=\"https:\/\/blog.beevoip.it\/wp-content\/uploads\/2022\/03\/image-22.png\" alt=\"Nat simmetrico e server STUN\" class=\"wp-image-506\" srcset=\"https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-22.png 597w, https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-22-263x300.png 263w, https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/image-22-369x420.png 369w\" sizes=\"auto, (max-width: 597px) 100vw, 597px\" \/><\/figure>\n\n\n\n<p>Symmetrical NAT e STUN? No!<br><\/p>\n\n\n\n<p>Il nat simmetrico crea una mappatura diversa per ogni dispositivo esterno contattato, quindi quella fornita allo stun server non sar\u00e0 uguale a quella degli altri dispositivi.<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>NAT E VOIP: SOLUZIONI APPLICABILI &#8211; STUN STUN richiede che il NAT permetta il passaggio di tutto il traffico diretto alla porta, e che venga inoltrato al client interno.Funziona con il Full-cone NAT e viene bloccato dal symmetric NAT NAT E VOIP: SOLUZIONI APPLICABILI &#8211; STUN &#8211; HANDS ON Binding response dal server STUN a [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":798,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[7],"tags":[],"class_list":{"0":"post-496","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-voip"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>NAT E VOIP: Una convivenza difficile - parte 12 - Blog Beevoip<\/title>\n<meta name=\"description\" content=\"STUN richiede che il NAT permetta il passaggio di tutto il traffico diretto alla porta, e che venga inoltrato al client interno.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.beevoip.it\/blog\/nat-e-voip-sip-una-convivenza-difficile-parte-12\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"NAT E VOIP: Una convivenza difficile - parte 12 - Blog Beevoip\" \/>\n<meta property=\"og:description\" content=\"STUN richiede che il NAT permetta il passaggio di tutto il traffico diretto alla porta, e che venga inoltrato al client interno.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.beevoip.it\/blog\/nat-e-voip-sip-una-convivenza-difficile-parte-12\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog Beevoip\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/beevoip\/\" \/>\n<meta property=\"article:published_time\" content=\"2022-04-28T07:27:20+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-04-28T07:27:21+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.beevoip.it\/blog\/wp-content\/uploads\/2022\/03\/Nat-e-voip12.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1920\" \/>\n\t<meta property=\"og:image:height\" content=\"720\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Asterweb\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Scritto da\" \/>\n\t<meta name=\"twitter:data1\" content=\"Asterweb\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tempo di lettura stimato\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minuti\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.beevoip.it\\\/blog\\\/nat-e-voip-sip-una-convivenza-difficile-parte-12\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.beevoip.it\\\/blog\\\/nat-e-voip-sip-una-convivenza-difficile-parte-12\\\/\"},\"author\":{\"name\":\"Asterweb\",\"@id\":\"https:\\\/\\\/www.beevoip.it\\\/blog\\\/#\\\/schema\\\/person\\\/872a314e510b029d629c5a1463b72c9f\"},\"headline\":\"NAT E VOIP: Una convivenza difficile &#8211; 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