{"id":36854,"date":"2019-10-31T22:14:15","date_gmt":"2019-10-31T19:14:15","guid":{"rendered":"https:\/\/prohoster.info\/blog\/retrospektiva-kak-istoshhalis-adresa-ipv4\/"},"modified":"2019-10-31T22:14:15","modified_gmt":"2019-10-31T19:14:15","slug":"retrospektiva-kak-istoshhalis-adresa-ipv4","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/administrirovanie\/retrospektiva-kak-istoshhalis-adresa-ipv4","title":{"rendered":"Retrospectiv\u0103: cum au fost epuizate adresele IPv4","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Geoff Huston, inginer principal de cercetare al registrului de internet APNIC, a prezis c\u0103 adresele IPv4 se vor epuiza \u00een 2020. \u00cen acest nou ciclu de materiale, vom re\u00eemprosp\u0103ta informa\u021biile despre cum au fost epuizate adresele, cine mai are \u0219i de ce s-a \u00eent\u00e2mplat acest lucru.<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/vasexperts\/blog\/462435\/\"><img decoding=\"async\" alt=\"Retrospectiv\u0103: cum au fost epuizate adresele IPv4\" src=\"\/wp-content\/uploads\/2019\/08\/b1bf313f07dff7552813a1e71d4f8bfe.png\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\n<i>\/ Unsplash \/ <noindex><a rel=\"nofollow\" href=\"https:\/\/unsplash.com\/photos\/EKnd0HcEyCM\">Lo\u00efc Mermilliod<\/a><\/noindex><\/i><\/p>\n<h2>De ce se epuizeaz\u0103 adresele<\/h2>\n<p>\n\u00cenainte de a trece la povestea despre cum a fost \u201euscat\u201d pool-ul IPv4, s\u0103 discut\u0103m pu\u021bin despre cauze. \u00cen 1983, la implementarea TCP\/IP, s-a folosit adresarea pe 32 de bi\u021bi. Atunci, <noindex><a rel=\"nofollow\" href=\"https:\/\/blogs.igalia.com\/dpino\/2017\/05\/25\/ipv4-exhaustion\/\">se p\u0103rea<\/a><\/noindex>, c\u0103 4,3 miliarde de adrese pentru 4,5 miliarde de oameni sunt suficiente. Dar atunci, dezvoltatorii nu au anticipat c\u0103 popula\u021bia planetei va cre\u0219te aproape de dou\u0103 ori, iar internetul va deveni un fenomen de mas\u0103.<\/p>\n<p>\u00cen anii '80, multe organiza\u021bii primeau mai multe adrese dec\u00e2t aveau nevoie. Unele companii folosesc \u0219i acum adrese publice pentru servere care func\u021bioneaz\u0103 exclusiv \u00een re\u021bele locale. Cre\u0219terea tehnologiilor mobile, a internetului obiectelor \u0219i a virtualiz\u0103rii a accentuat problema. Gre\u0219elile \u00een estimarea num\u0103rului de host-uri din re\u021beaua global\u0103 \u0219i distribuirea ineficient\u0103 a adreselor au dus la deficitul de IPv4.<\/p>\n<h2>Cum se epuizau adresele<\/h2>\n<p>\nLa \u00eenceputul anilor 2000, directorul APNIC, Paul Wilson, <noindex><a rel=\"nofollow\" href=\"https:\/\/www.cnet.com\/news\/exec-no-shortage-of-net-addresses\/\">a declarat<\/a><\/noindex>, a prezis c\u0103 adresele IPv4 se vor epuiza \u00een urm\u0103torii zece ani. \u00cen general, prognoza sa s-a dovedit destul de precis\u0103.<\/p>\n<p><b>2011:<\/b> A\u0219a cum a prezis Wilson, registrul de internet APNIC (responsabil pentru regiunea Asia-Pacific) a r\u0103mas cu ultimul <noindex><a rel=\"nofollow\" href=\"https:\/\/ro.wikipedia.org\/wiki\/Adresare_f\u0103r\u0103_clas\u0103\">bloc \/8.<\/a><\/noindex>Organiza\u021bia a introdus o nou\u0103 regul\u0103 \u2014 un bloc de 1024 de adrese pentru \u201eo singur\u0103 m\u00e2n\u0103\u201d. Anali\u0219tii afirm\u0103 c\u0103 f\u0103r\u0103 aceast\u0103 restric\u021bie blocul \/8 s-ar fi epuizat \u00eentr-o lun\u0103. Acum, APNIC dispune doar de un num\u0103r mic de adrese.<\/p>\n<p><b>2012:<\/b> Registrul de internet european RIPE a anun\u021bat despre epuizarea pool-ului. De asemenea, a \u00eenceput s\u0103 distribuie ultimul bloc \/8. Organiza\u021bia a urmat exemplul APNIC \u0219i a impus restric\u021bii stricte asupra distribu\u021biei IPv4. \u00cen 2015, RIPE mai avea doar 16 milioane de adrese disponibile. Ast\u0103zi, acest num\u0103r s-a redus semnificativ \u2014 <noindex><a rel=\"nofollow\" href=\"https:\/\/www.ripe.net\/publications\/ipv6-info-centre\/about-ipv6\/ipv4-exhaustion\/ipv4-available-pool\">la 3,5 milioane.<\/a><\/noindex>Este important de men\u021bionat c\u0103 \u00een 2012 <noindex><a rel=\"nofollow\" href=\"https:\/\/www.worldipv6launch.org\/\">a avut loc lansarea mondial\u0103 a IPv6.<\/a><\/noindex>. Operatorii de telecomunica\u021bii din \u00eentreaga lume au activat un nou protocol pentru o parte dintre clien\u021bii lor. Printre primii s-au num\u0103rat AT&amp;T, Comcast, Free Telecom, Internode, XS4ALL \u0219i altele. \u00cen acest context, Cisco \u0219i D-Link au inclus IPv6 ca setare implicit\u0103 \u00een configurarea routerelor pe care le produc.<\/p>\n<blockquote><p><b>O serie de materiale proaspete de pe blogul nostru de pe Habr:<\/b><\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/vasexperts\/blog\/461431\/\">\u201eIube\u0219te \u0219i nu iube\u0219te\u201d: DNS peste HTTPS<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/vasexperts\/blog\/461443\/\">Post-analiza: ce se \u0219tie despre ultimul atac asupra re\u021belei serverelor de criptocluce SKS Keyserver<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/vasexperts\/blog\/457106\/\">R\u0103zboiul cu robo\u021belii de apeluri din SUA - cine c\u00e2\u0219tig\u0103 \u0219i de ce<\/a><\/noindex><\/li>\n<\/ul>\n<\/blockquote>\n<p>\n<b>Anul 2013:<\/b> Jeff Haston de la APNIC pe blogul <noindex><a rel=\"nofollow\" href=\"http:\/\/www.circleid.com\/posts\/20130724_exactly_when_is_arin_going_to_run_out_of_ipv4_addresses\/\">a spus<\/a><\/noindex>, c\u0103 adresele IPv4 de la registratorul american ARIN se vor termina \u00een a doua jum\u0103tate a anului 2014. Aproximativ \u00een aceea\u0219i vreme, reprezentan\u021bii ARIN <noindex><a rel=\"nofollow\" href=\"https:\/\/www.arin.net\/vault\/announcements\/2013\/20130801.html\">au anun\u021bat<\/a><\/noindex>, au spus c\u0103 le-au mai r\u0103mas doar dou\u0103 blocuri \/8.<\/p>\n<p><b>Anul 2015:<\/b> ARIN <noindex><a rel=\"nofollow\" href=\"https:\/\/www.theregister.co.uk\/2015\/09\/24\/arin_ipv4_interview_ipv6\/\">este<\/a><\/noindex> a devenit primul registrator care \u0219i-a epuizat complet rezervele de adrese IPv4. Toate companiile din aceast\u0103 regiune au intrat \u00een r\u00e2nd \u0219i a\u0219teapt\u0103 ca cineva s\u0103 elibereze IP-uri neutilizate.<\/p>\n<p><b>Anul 2017:<\/b> Despre oprirea eliber\u0103rii adreselor\u00a0<noindex><a rel=\"nofollow\" href=\"http:\/\/www.potaroo.net\/ispcol\/2015-08\/last8.html\">au declarat<\/a><\/noindex>\u00a0la registratorul LACNIC, care se ocup\u0103 de \u021b\u0103rile din America Latin\u0103. Acum <noindex><a rel=\"nofollow\" href=\"http:\/\/www.lacnic.net\/web\/lacnic\/agotamiento-ipv4\">a achizi\u021biona<\/a><\/noindex> blocurile pot fi ob\u021binute doar de acele companii care nu au primit anterior adrese. \u00cen AFRINIC \u2014 responsabil pentru regiunea african\u0103 \u2014 au fost introduse, de asemenea, restric\u021bii de eliberare a adreselor. Se evalueaz\u0103 cu stricte\u021be destina\u021bia acestora, iar num\u0103rul maxim pe care o entitate \u00eel poate ob\u021bine este limitat.<\/p>\n<p><b>Anul 2019:<\/b> \u00cen prezent, to\u021bi registratorii au r\u0103mas cu un num\u0103r relativ mic de adrese. P\u00e2rghiile sunt men\u021binute pe linia de plutire prin faptul c\u0103 adresele neutilizate sunt returnate periodic \u00een circula\u021bie. De exemplu, la MIT <noindex><a rel=\"nofollow\" href=\"https:\/\/www.techspot.com\/news\/69055-mit-unload-8-million-ipv4-addresses-fund-ipv6.html\">s-a descoperit<\/a><\/noindex> sunt 14 milioane de IP-uri. Peste jum\u0103tate dintre acestea au fost rev\u00e2ndute companiilor care aveau nevoie.<\/p>\n<h2>Ce urmeaz\u0103<\/h2>\n<p>\nExist\u0103 o opinie c\u0103 adresele IPv4 <noindex><a rel=\"nofollow\" href=\"https:\/\/ipv4.potaroo.net\/\">se va termina<\/a><\/noindex> vor fi epuizate p\u00e2n\u0103 \u00een februarie 2020. Dup\u0103 aceasta, furnizorii de internet, produc\u0103torii de echipamente de re\u021bea \u0219i alte companii <noindex><a rel=\"nofollow\" href=\"https:\/\/arstechnica.com\/tech-policy\/2011\/04\/no-more-addresses-asia-pacific-region-ipv4-well-runs-dry\/\">vor avea de ales<\/a><\/noindex> \u2014 migrarea la IPv6 sau continuarea utiliz\u0103rii <noindex><a rel=\"nofollow\" href=\"http:\/\/blog.vasexperts.ru\/?p=120\">mecanismelor NAT<\/a><\/noindex>.<\/p>\n<p>Traducerea adreselor de re\u021bea (NAT) permite transformarea mai multor adrese locale \u00eentr-o singur\u0103 adres\u0103 extern\u0103. Num\u0103rul maxim de porturi este de 65 de mii. Teoretic, acela\u0219i num\u0103r de adrese locale poate fi mapat pe o singur\u0103 adres\u0103 public\u0103 (dac\u0103 nu lu\u0103m \u00een calcul unele restric\u021bii ale unor implement\u0103ri specifice NAT).<\/p>\n<p><img decoding=\"async\" alt=\"Retrospectiv\u0103: cum au fost epuizate adresele IPv4\" src=\"\/wp-content\/uploads\/2019\/08\/18505c575eee7ff32fdfcaf989d710bd.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>\/ Unsplash \/ <noindex><a rel=\"nofollow\" href=\"https:\/\/unsplash.com\/photos\/X5c3f2QZGXQ\">Jordan Whitt<\/a><\/noindex><\/i><\/p>\n<p>Furnizorii de internet pot apela la solu\u021bii specializate \u2014 Carrier Grade NAT. Acestea permit gestionarea centralizat\u0103 a adreselor locale \u0219i externe ale abona\u021bilor \u0219i limiteaz\u0103 num\u0103rul de porturi TCP \u0219i UDP disponibile clien\u021bilor. Astfel, porturile \u00eentre utilizatori sunt distribuite mai eficient, plus se adaug\u0103 o protec\u021bie \u00eempotriva atacurilor DDoS.<\/p>\n<p>Printre dezavantajele NAT se num\u0103r\u0103 problemele poten\u021biale cu firewall-urile. Toate sesiunile utilizatorilor ies pe re\u021bea cu o singur\u0103 adres\u0103 IP public\u0103. Asta \u00eenseamn\u0103 c\u0103 un singur client poate lucra simultan cu site-uri care ofer\u0103 acces la servicii prin IP. Mai mult, resursa poate considera c\u0103 este \u021bintit\u0103 de un atac DoS \u0219i poate bloca accesul tuturor clien\u021bilor.<\/p>\n<p>O alternativ\u0103 la NAT este trecerea la IPv6. Aceste adrese vor fi suficiente pentru o lung\u0103 perioad\u0103 de timp \u0219i, \u00een plus, acesta are o serie de avantaje. De exemplu, componenta \u00eencorporat\u0103 IPSec, care cripteaz\u0103 pachetele de date individuale.<\/p>\n<p>P\u00e2n\u0103 acum, IPv6\u00a0<noindex><a rel=\"nofollow\" href=\"https:\/\/w3techs.com\/technologies\/details\/ce-ipv6\/all\/all\">se folose\u0219te<\/a><\/noindex>\u00a0reprezint\u0103 doar 14,3% din site-urile web din \u00eentreaga lume. R\u0103sp\u00e2ndirea larg\u0103 a protocolului este \u00eempiedicat\u0103 de c\u00e2\u021biva factori, legati de costurile migra\u021biei, lipsa compatibilit\u0103\u021bii inverse \u0219i dificult\u0103\u021bile tehnice \u00een implementare.<\/p>\n<p>Despre aceasta vom vorbi data viitoare.<\/p>\n<blockquote><p><b>Implementarea IPv6 \u2013 FAQ pentru furnizorii de internet<\/b><\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/vasexperts.ru\/blog\/seti\/vnedrenie-ipv6-faq-dlya-internet-provajderov\/\">Implementarea IPv6 - FAQ pentru furnizorii de internet<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/vasexperts.ru\/blog\/telekom\/protokol-ipv6-ot-teorii-k-praktike\/\">Protocolul IPv6 - de la teorie la practic\u0103<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/vasexperts.ru\/blog\/telekom\/ekonomiya-na-spichkax-i-neskolko-sposobov-vystrelit-sebe-v-nogu-kriticheskie-oshibki-v-stroitelstve-setej-operatorov-svyazi\/\">\u201e\u00cempu\u0219c\u0103tur\u0103 \u00een picior\u201d: erori critice \u00een construc\u021bia re\u021belelor operatorilor de telecomunica\u021bii<\/a><\/noindex><\/li>\n<\/ul>\n<\/blockquote>\n<p>Sursa: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/vasexperts\/blog\/462435\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0414\u0436\u0435\u0444\u0444 \u0425\u0430\u0441\u0442\u043e\u043d (Geoff Huston), \u0433\u043b\u0430\u0432\u043d\u044b\u0439 \u0438\u043d\u0436\u0435\u043d\u0435\u0440-\u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c \u0438\u043d\u0442\u0435\u0440\u043d\u0435\u0442-\u0440\u0435\u0433\u0438\u0441\u0442\u0440\u0430\u0442\u043e\u0440\u0430 APNIC, \u0441\u043f\u0440\u043e\u0433\u043d\u043e\u0437\u0438\u0440\u043e\u0432\u0430\u043b, \u0447\u0442\u043e \u0430\u0434\u0440\u0435\u0441\u0430 IPv4 \u0437\u0430\u043a\u043e\u043d\u0447\u0430\u0442\u0441\u044f \u0432 2020 \u0433\u043e\u0434\u0443. \u0412 \u043d\u043e\u0432\u043e\u043c \u0446\u0438\u043a\u043b\u0435 \u043c\u0430\u0442\u0435\u0440\u0438\u0430\u043b\u043e\u0432 \u043c\u044b \u043e\u0441\u0432\u0435\u0436\u0438\u043c \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044e \u043e \u0442\u043e\u043c, \u043a\u0430\u043a \u0438\u0441\u0442\u043e\u0449\u0430\u043b\u0438\u0441\u044c \u0430\u0434\u0440\u0435\u0441\u0430, \u0443 \u043a\u043e\u0433\u043e \u043e\u043d\u0438 \u0435\u0449\u0435 \u043e\u0441\u0442\u0430\u043b\u0438\u0441\u044c \u0438 \u043f\u043e\u0447\u0435\u043c\u0443 \u0442\u0430\u043a \u043f\u043e\u043b\u0443\u0447\u0438\u043b\u043e\u0441\u044c. \/ Unsplash \/ Lo\u00efc Mermilliod \u041f\u043e\u0447\u0435\u043c\u0443 \u043a\u043e\u043d\u0447\u0430\u044e\u0442\u0441\u044f \u0430\u0434\u0440\u0435\u0441\u0430 \u041f\u0440\u0435\u0436\u0434\u0435 \u0447\u0435\u043c \u043f\u0435\u0440\u0435\u0439\u0442\u0438 \u043a \u0440\u0430\u0441\u0441\u043a\u0430\u0437\u0443 \u043e \u0442\u043e\u043c, \u043a\u0430\u043a \u00ab\u0432\u044b\u0441\u044b\u0445\u0430\u043b\u00bb \u043f\u0443\u043b [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":27613,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-36854","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0414\u0436\u0435\u0444\u0444 \u0425\u0430\u0441\u0442\u043e\u043d (Geoff Huston), 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