{"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\/hr\/blog\/administrirovanie\/retrospektiva-kak-istoshhalis-adresa-ipv4","title":{"rendered":"Retrospektiva: kako su se iscrpili IPv4 adresa","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Geoff Huston, glavni in\u017eenjer-istra\u017eiva\u010d internet registrara APNIC, predvidio je da \u0107e IPv4 adrese nestati do 2020. godine. U novom ciklusu materijala osvje\u017eavamo informacije o tome kako su adrese iscrpljene, tko ih jo\u0161 ima i za\u0161to je do toga do\u0161lo.<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/vasexperts\/blog\/462435\/\"><img decoding=\"async\" alt=\"Retrospektiva: kako su se iscrpili IPv4 adresa\" 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>Za\u0161to adrese nestaju<\/h2>\n<p>\nPrije nego \u0161to pre\u0111emo na pri\u010du o tome kako je 'isu\u0161avan' IPv4 bazen, malo \u0107emo razgovarati o uzrocima. Godine 1983. prilikom implementacije TCP\/IP kori\u0161tena je 32-bitna adresacija. Tada se \u010dinilo <noindex><a rel=\"nofollow\" href=\"https:\/\/blogs.igalia.com\/dpino\/2017\/05\/25\/ipv4-exhaustion\/\">da je 4,3 milijarde adresa za 4,5 milijardi ljudi vi\u0161e nego dovoljno. No tada programeri nisu uzeli u obzir da \u0107e svjetska populacija narasti gotovo dvostruko, a internet \u0107e ste\u0107i masovnu popularnost.<\/a><\/noindex>U to vrijeme, mnoge organizacije su u 80-im godinama dobile vi\u0161e adresa nego \u0161to im je zapravo bilo potrebno. Neki su podaci i dalje koristili javne adrese za servere koji rade isklju\u010divo u lokalnim mre\u017eama. \u0160irenje mobilnih tehnologija, Interneta stvari i virtualizacije dodatno je pogor\u0161alo situaciju. Gre\u0161ke u procjeni broja hostova u globalnoj mre\u017ei i neu\u010dinkovita distribucija adresa postali su uzroci nedostatka IPv4.<\/p>\n<p>Kako su adrese nestajale<\/p>\n<h2>Po\u010detkom 2000-ih, direktor APNIC-a Paul Wilson<\/h2>\n<p>\npredvidio je da \u0107e IPv4 adrese nestati u sljede\u0107ih deset godina. Njegova procjena se pokazala prili\u010dno to\u010dnom. <noindex><a rel=\"nofollow\" href=\"https:\/\/www.cnet.com\/news\/exec-no-shortage-of-net-addresses\/\">izjavio<\/a><\/noindex>2011. godina:<\/p>\n<p><b>Kao \u0161to je prognozirao Wilson, internet registrar APNIC (odgovoran za azijsko-pacifi\u010dku regiju) imao je posljednji<\/b> blok \/8 <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/Besk classes address\">. Organizacija je uvela novo pravilo \u2014 jedan blok adresa od 1024 adrese u 'jedne ruke'. Analiti\u010dari ka\u017eu da bez ovog ograni\u010denja blok \/8 bi se iscrpio u mjesec dana. Sada APNIC-u preostaje samo mali broj adresa.<\/a><\/noindex>2012. godina:<\/p>\n<p><b>O iscrpljenju bazena oglasio je europski internet registrator RIPE. Tako\u0111er je po\u010deo dijeliti posljednji blok \/8. Organizacija je slijedila primjer APNIC-a i uvela stroga ograni\u010denja na distribuciju IPv4 adresa. Godine 2015. RIPE je imao samo 16 milijuna slobodnih adresa. Danas se taj broj zna\u010dajno smanjio \u2014<\/b> na 3,5 milijuna. <noindex><a rel=\"nofollow\" href=\"https:\/\/www.ripe.net\/publications\/ipv6-info-centre\/about-ipv6\/ipv4-exhaustion\/ipv4-available-pool\">Treba napomenuti da se 2012. godine<\/a><\/noindex>odr\u017ealo svjetsko lansiranje IPv6. <noindex><a rel=\"nofollow\" href=\"https:\/\/www.worldipv6launch.org\/\">Svjetski telekomunikacijski operateri aktivirali su novi protokol za dio svojih korisnika. Me\u0111u prvima su bili AT&amp;T, Comcast, Free Telecom, Internode, XS4ALL i drugi. U isto vrijeme, Cisco i D-Link uklju\u010dili su IPv6 kao zadano u postavkama svojih routera.<\/a><\/noindex>. Svjetski telekomunikacijski operateri aktivirali su novi protokol za dio svojih klijenata. Me\u0111u prvima su bili AT&amp;T, Comcast, Free Telecom, Internode, XS4ALL i drugi. U isto vrijeme, Cisco i D-Link omogu\u0107ili su IPv6 prema zadanim postavkama u konfiguracijama svojih usmjeriva\u010da.<\/p>\n<blockquote><p><b>Novi sadr\u017eaj s na\u0161eg bloga na Habr-u:<\/b><\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/vasexperts\/blog\/461431\/\">\u201eVolim i ne volim\u201c: DNS preko HTTPS-a<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/vasexperts\/blog\/461443\/\">Post-analiza: \u0161to se zna o posljednjem napadu na mre\u017eu poslu\u017eitelja za kriptoklju\u010d SKS Keyserver<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/vasexperts\/blog\/457106\/\">Rat protiv robopoziva u SAD-u \u2014 tko pobje\u0111uje i za\u0161to<\/a><\/noindex><\/li>\n<\/ul>\n<\/blockquote>\n<p>\n<b>2013. godina:<\/b> Jeff Haston iz APNIC-a na blogu <noindex><a rel=\"nofollow\" href=\"http:\/\/www.circleid.com\/posts\/20130724_exactly_when_is_arin_going_to_run_out_of_ipv4_addresses\/\">ispri\u010dao<\/a><\/noindex>, da \u0107e IPv4 adrese kod ameri\u010dkog registara ARIN ispariti u drugoj polovici 2014. godine. Otprilike u to vrijeme predstavnici ARIN-a <noindex><a rel=\"nofollow\" href=\"https:\/\/www.arin.net\/vault\/announcements\/2013\/20130801.html\">objavili su<\/a><\/noindex>, da im je preostalo samo dva bloka \/8.<\/p>\n<p><b>2015. godina:<\/b> ARIN <noindex><a rel=\"nofollow\" href=\"https:\/\/www.theregister.co.uk\/2015\/09\/24\/arin_ipv4_interview_ipv6\/\">postao<\/a><\/noindex> bio je prvi registar koji je potpuno iscrpio svoj bazen slobodnih IPv4 adresa. Sve tvrtke u ovoj regiji stavljene su na \u010dekanje o\u010dekuju\u0107i da netko oslobodi neiskori\u0161tene IP adrese.<\/p>\n<p><b>2017. godina:<\/b> O obustavi dodjele adresa\u00a0<noindex><a rel=\"nofollow\" href=\"http:\/\/www.potaroo.net\/ispcol\/2015-08\/last8.html\">su izjavili<\/a><\/noindex>\u00a0u registraru LACNIC, koji odgovara za zemlje Latinske Amerike. Sada <noindex><a rel=\"nofollow\" href=\"http:\/\/www.lacnic.net\/web\/lacnic\/agotamiento-ipv4\">kupnja<\/a><\/noindex> bloka mogu\u0107a je samo za one tvrtke koje ranije nisu dobile adrese. U AFRINIC-u \u2014 odgovornom za afri\u010dku regiju \u2014 tako\u0111er su uvedena ograni\u010denja na dodjelu adresa. Strogo se procjenjuje njihovo kori\u0161tenje, a maksimalan broj u jednom vlasni\u0161tvu je ograni\u010den.<\/p>\n<p><b>2019. godina:<\/b> Danas svim registrarima preostaje relativno mali broj adresa. Bazeni se odr\u017eavaju zahvaljuju\u0107i tome \u0161to se neiskori\u0161tene adrese povremeno vra\u0107aju u promet. Na primjer, na MIT-u <noindex><a rel=\"nofollow\" href=\"https:\/\/www.techspot.com\/news\/69055-mit-unload-8-million-ipv4-addresses-fund-ipv6.html\">otkriveno je<\/a><\/noindex> 14 milijuna IP adresa. Vi\u0161e od polovice njih odlu\u010deno je preprodati potrebnim tvrtkama.<\/p>\n<h2>\u0160to dalje<\/h2>\n<p>\nPostoji mi\u0161ljenje da \u0107e IPv4 adrese <noindex><a rel=\"nofollow\" href=\"https:\/\/ipv4.potaroo.net\/\">ispariti<\/a><\/noindex> do velja\u010de 2020. godine. Nakon toga \u0107e pred internet providerima, proizvo\u0111a\u010dima mre\u017enih ure\u0111aja i drugim tvrtkama <noindex><a rel=\"nofollow\" href=\"https:\/\/arstechnica.com\/tech-policy\/2011\/04\/no-more-addresses-asia-pacific-region-ipv4-well-runs-dry\/\">biti izbor<\/a><\/noindex> \u2014 migrirati na IPv6 ili raditi s <noindex><a rel=\"nofollow\" href=\"http:\/\/blog.vasexperts.ru\/?p=120\">NAT mehanizmima<\/a><\/noindex>.<\/p>\n<p>Prevo\u0111enje mre\u017enih adresa (NAT) omogu\u0107ava pretvaranje nekoliko lokalnih adresa u jednu vanjsku. Maksimalni broj portova iznosi 65 tisu\u0107a. Teoretski se isto toliko lokalnih adresa mo\u017ee mapirati na jednu javnu adresu (ako ne uzimamo u obzir neka ograni\u010denja pojedinih implementacija NAT-a).<\/p>\n<p><img decoding=\"async\" alt=\"Retrospektiva: kako su se iscrpili IPv4 adresa\" 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>Internet provajderi mogu se obratiti specijaliziranim rje\u0161enjima \u2014 Carrier Grade NAT. Ona omogu\u0107avaju centralizirano upravljanje lokalnim i vanjskim adresama pretplatnika te ograni\u010davaju broj TCP i UDP portova dostupnih klijentima. Na taj na\u010din, portovi se raspore\u0111uju efikasnije izme\u0111u korisnika, a pru\u017ea se i za\u0161tita od DDoS napada.<\/p>\n<p>Neki od nedostataka NAT-a uklju\u010duju potencijalne probleme s vatrozidima. Sve korisni\u010dke sesije izlaze u mre\u017eu s jedne javne adrese. Time se ispostavlja da samo jedan klijent mo\u017ee istovremeno raditi s web stranicama koje omogu\u0107uju pristup uslugama putem IP-a. \u0160tovi\u0161e, resurs mo\u017ee pomisliti da ga napada DoS napad i zatvoriti pristup svim klijentima.<\/p>\n<p>Alternativa NAT-u je prelazak na IPv6. Ovih adresa \u0107e biti dovoljno dugo vremena, plus ima niz prednosti. Na primjer, ugra\u0111ena komponenta IPSec koja \u0161ifrira pojedina\u010dne pakete podataka.<\/p>\n<p>Trenutno IPv6\u00a0<noindex><a rel=\"nofollow\" href=\"https:\/\/w3techs.com\/technologies\/details\/ce-ipv6\/all\/all\">koristi se<\/a><\/noindex>\u00a0\u010dini samo 14,3% svih web stranica na svijetu. \u0160irenju protokola ko\u010de nekoliko faktora, uklju\u010duju\u0107i tro\u0161kove migracije, nedostatak unazadne kompatibilnosti i tehni\u010dke izazove prilikom implementacije.<\/p>\n<p>O tome \u0107emo pri\u010dati sljede\u0107i put.<\/p>\n<blockquote><p><b>O \u010demu pi\u0161emo u korporativnom blogu VAS Experts:<\/b><\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/vasexperts.ru\/blog\/seti\/vnedrenie-ipv6-faq-dlya-internet-provajderov\/\">Implementacija IPv6 \u2014 FAQ za internet provajdere<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/vasexperts.ru\/blog\/telekom\/protokol-ipv6-ot-teorii-k-praktike\/\">Protokol IPv6 \u2014 od teorije do prakse<\/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\/\">\u201ePucanj u nogu\u201d: kriti\u010dne gre\u0161ke u gradnji mre\u017ea pru\u017eatelja usluga<\/a><\/noindex><\/li>\n<\/ul>\n<\/blockquote>\n<p>Izvor: <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 5.0.4 - aioseo.com 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