{"id":37675,"date":"2019-10-31T22:18:59","date_gmt":"2019-10-31T19:18:59","guid":{"rendered":"https:\/\/prohoster.info\/blog\/opublikovan-dhcp-server-kea-1-6-razvivaemyj-konsortsiumom-isc\/"},"modified":"2019-10-31T22:18:59","modified_gmt":"2019-10-31T19:18:59","slug":"opublikovan-dhcp-server-kea-1-6-razvivaemyj-konsortsiumom-isc","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/news\/opublikovan-dhcp-server-kea-1-6-razvivaemyj-konsortsiumom-isc","title":{"rendered":"A fost publicat serverul DHCP Kea 1.6, dezvoltat de consor\u021biul ISC","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Consor\u021biul ISC <noindex><a rel=\"nofollow\" href=\"https:\/\/www.isc.org\/blogs\/kea-1-6\/\">a publicat<\/a><\/noindex> versiunea serverului DHCP <noindex><a rel=\"nofollow\" href=\"http:\/\/kea.isc.org\">Kea 1.6.0<\/a><\/noindex>, care \u00eenlocuie\u0219te clasicul ISC DHCP. Codurile surs\u0103 ale proiectului <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/isc-projects\/kea\">sunt distribuite<\/a><\/noindex> sub licen\u021b\u0103 <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=32726\">Licen\u021ba Public\u0103 Mozilla (MPL) 2.0<\/a><\/noindex>, \u00een locul licen\u021bei ISC aplicate anterior pentru ISC DHCP. <\/p>\n<p>Serverul DHCP Kea se bazeaz\u0103 pe tehnologiile BIND 10 \u0219i <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=36235\">este construit<\/a><\/noindex> folosind o arhitectur\u0103 modular\u0103, care implic\u0103 divizarea func\u021bionalit\u0103\u021bii \u00een diferite procese gestionare. Produsul include o implementare complet func\u021bional\u0103 a serverului, cu suport pentru protocoalele DHCPv4 \u0219i DHCPv6, capabil s\u0103 \u00eenlocuiasc\u0103 ISC DHCP. \u00cen Kea sunt incluse instrumente pentru actualizarea dinamic\u0103 a zonelor DNS (Dynamic DNS), sunt acceptate mecanisme pentru descoperirea serverelor, alocarea adreselor, actualizarea \u0219i reconectarea, gestionarea cererilor de informa\u021bii, rezervarea adreselor pentru gazde \u0219i bootarea PXE. \u00cen implementarea DHCPv6 este prev\u0103zut\u0103 \u00een plus posibilitatea deleg\u0103rii prefixelor. Pentru interac\u021biunea cu aplica\u021bii externe este oferit un API special. Este posibil\u0103 actualizarea configura\u021biei la fa\u021ba locului f\u0103r\u0103 repornirea serverului.<\/p>\n<p>Informa\u021biile despre adresele dedicate \u0219i parametrii clien\u021bilor pot fi stocate \u00een diferite tipuri de depozite \u2014 \u00een prezent sunt disponibile backend-uri pentru stocarea \u00een fi\u0219iere CSV, baze de date MySQL, Apache Cassandra \u0219i PostgreSQL. Parametrii de rezervare a gazdelor pot fi specifica\u021bi \u00eentr-un fi\u0219ier de configurare \u00een format JSON sau sub form\u0103 de tabel \u00een MySQL \u0219i PostgreSQL. Este inclus un instrument perfdhcp pentru m\u0103surarea performan\u021bei serverului DHCP \u0219i componente pentru colectarea statisticilor. Kea arat\u0103 o performan\u021b\u0103 decent\u0103; de exemplu, utiliz\u00e2nd backend-ul MySQL, serverul poate efectua 1000 de atribuirii de adrese pe secund\u0103 (aproximativ 4000 de pachete pe secund\u0103), iar utiliz\u00e2nd backend-ul memfile, performan\u021ba ajunge la 7500 de atribuiri pe secund\u0103.<\/p>\n<p><center><noindex><a rel=\"nofollow\" href=\"http:\/\/bind10.isc.org\/raw-attachment\/wiki\/DesignDiagrams\/Overview-DHCP-2013-01-16.png\"><img decoding=\"async\" alt=\"A fost publicat serverul DHCP Kea 1.6, dezvoltat de consor\u021biul ISC \" src=\"\/wp-content\/uploads\/2019\/09\/506faa6784a89a80eb89611b1cc11a24.png\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p>Principalele <noindex><a rel=\"nofollow\" href=\"https:\/\/ftp.isc.org\/isc\/kea\/1.6.0\/Kea160ReleaseNotes.txt\">\u00eembun\u0103t\u0103\u021biri<\/a><\/noindex> \u00een Kea 1.6:<\/p>\n<ul>\n<li class=\"l\"> A fost implementat un backend de configurare (CB, Configuration Backend) care permite gestionarea centralizat\u0103 a set\u0103rilor mai multor servere DHCPv4 \u0219i DHCPv6. Backend-ul poate fi utilizat pentru a stoca majoritatea set\u0103rilor Kea, inclusiv parametrii globali, informa\u021bii despre re\u021belele comune, subneturi, op\u021biuni, grupuri \u0219i defini\u021bii de op\u021biuni. \u00cen loc s\u0103 stocheze toate aceste set\u0103ri \u00eentr-un fi\u0219ier de configurare local, acestea pot fi acum plasate \u00eentr-o baz\u0103 de date extern\u0103. Este posibil s\u0103 se defineasc\u0103 prin CB nu toate, ci o parte a set\u0103rilor, cu suprapunerea parametrilor din baza de date extern\u0103 \u0219i fi\u0219ierele de configurare locale (de exemplu, \u00een fi\u0219ierele locale pot fi l\u0103sate set\u0103rile interfe\u021belor de re\u021bea).\n<p>Pentru stocarea configura\u021biei, momentan este suportat doar MySQL (pentru stocarea bazelor de alocare a adreselor (leases) pot fi folosite MySQL, PostgreSQL \u0219i Cassandra, iar pentru rezervarea gazdelor, MySQL \u0219i PostgreSQL). Configura\u021bia \u00een baza de date poate fi modificat\u0103 at\u00e2t prin acces direct la SGBD, c\u00e2t \u0219i prin biblioteci intermediare special preg\u0103tite, care ofer\u0103 un set standard de comenzi pentru gestionarea configura\u021biei, cum ar fi ad\u0103ugarea \u0219i \u0219tergerea parametrilor, leg\u0103turilor, op\u021biunilor DHCP \u0219i subneturilor;<\/p>\n<li class=\"l\"> A fost ad\u0103ugat o nou\u0103 clas\u0103 de procesatori \u201eDROP\u201d (toate pachetele legate de clasa DROP sunt imediat respinse), care poate fi utilizat\u0103 pentru a bloca traficul nedorit, cum ar fi anumite tipuri de mesaje DHCP;\n<li class=\"l\"> Au fost ad\u0103ugate noi parametrii max-lease-time \u0219i min-lease-time, care permit definirea duratei de via\u021b\u0103 a leg\u0103turii adresei cu clientul (lease) nu sub form\u0103 de valoare fix\u0103, ci ca un interval acceptabil;\n<li class=\"l\"> A fost \u00eembun\u0103t\u0103\u021bit\u0103 compatibilitatea cu dispozitivele care nu respect\u0103 \u00een totalitate standardele pentru DHCP. Pentru a ocoli problemele, Kea trimite acum informa\u021bii despre tipul de mesaj DHCPv4 chiar la \u00eenceputul listei de op\u021biuni, proceseaz\u0103 diverse formate de nume de gazde, recunoa\u0219te transmiterea unui nume de gazd\u0103 gol \u0219i permite definirea subop\u021biunilor cu coduri de la 0 la 255;\n<li class=\"l\"> Pentru demonul DDNS a fost ad\u0103ugat un socket de control distinct, prin care pot fi transmise direct comenzi \u0219i efectuate modific\u0103ri \u00een configura\u021bie. Sunt acceptate urm\u0103toarele comenzi: build-report, config-get, config-reload, config-set, config-test, config-write, list-commands, shutdown \u0219i version-get;\n<li class=\"l\"> Corectate <noindex><a rel=\"nofollow\" href=\"https:\/\/www.openwall.com\/lists\/oss-security\/2019\/08\/29\/\">vulnerabilit\u0103\u021bi<\/a><\/noindex> (CVE-2019-6472, CVE-2019-6473, CVE-2019-6474), care pot fi folosite pentru a provoca un atac de tip denial of service (cauz\u00e2nd pr\u0103bu\u0219irea proceselor serverului DHCPv4 \u0219i DHCPv6) prin trimiterea de cereri cu op\u021biuni \u0219i valori incorecte. Problema prezint\u0103 cel mai mare risc. <noindex><a rel=\"nofollow\" href=\"https:\/\/kb.isc.org\/docs\/cve-2019-6474\">CVE-2019-6474<\/a><\/noindex>, care, \u00een cazul utiliz\u0103rii pentru asocieri memfile storage, duce la imposibilitatea repornirii procesului serverului de c\u0103tre sine, a\u0219a c\u0103 pentru a restaura func\u021bionarea este necesar un interventie manual\u0103 a administratorului (cur\u0103\u021barea bazei de asocieri).\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Sursa: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51393\">opennet.ro<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041a\u043e\u043d\u0441\u043e\u0440\u0446\u0438\u0443\u043c ISC \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b \u0440\u0435\u043b\u0438\u0437 DHCP-\u0441\u0435\u0440\u0432\u0435\u0440\u0430 Kea 1.6.0, \u0438\u0434\u0443\u0449\u0435\u0433\u043e \u043d\u0430 \u0441\u043c\u0435\u043d\u0443 \u043a\u043b\u0430\u0441\u0441\u0438\u0447\u0435\u0441\u043a\u043e\u043c\u0443 ISC DHCP. \u0418\u0441\u0445\u043e\u0434\u043d\u044b\u0435 \u0442\u0435\u043a\u0441\u0442\u044b \u043f\u0440\u043e\u0435\u043a\u0442\u0430 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u044e\u0442\u0441\u044f \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 Mozilla Public License (MPL) 2.0, \u0432\u043c\u0435\u0441\u0442\u043e \u0440\u0430\u043d\u0435\u0435 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u043e\u0439 \u0434\u043b\u044f ISC DHCP \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0438 ISC License. DHCP-\u0441\u0435\u0440\u0432\u0435\u0440 Kea \u043e\u0441\u043d\u043e\u0432\u0430\u043d \u043d\u0430 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u044f\u0445 BIND 10 \u0438 \u043f\u043e\u0441\u0442\u0440\u043e\u0435\u043d \u0441 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435\u043c \u043c\u043e\u0434\u0443\u043b\u044c\u043d\u043e\u0439 \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u044b, \u043f\u043e\u0434\u0440\u0430\u0437\u0443\u043c\u0435\u0432\u0430\u044e\u0449\u0435\u0439 \u0440\u0430\u0437\u0431\u0438\u0435\u043d\u0438\u0435 \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u043e\u0441\u0442\u0438 \u043d\u0430 \u0440\u0430\u0437\u043d\u044b\u0435 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u044b-\u043e\u0431\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438. \u041f\u0440\u043e\u0434\u0443\u043a\u0442 \u0432\u043a\u043b\u044e\u0447\u0430\u0435\u0442 \u0432 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":28274,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-37675","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041a\u043e\u043d\u0441\u043e\u0440\u0446\u0438\u0443\u043c ISC \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b \u0440\u0435\u043b\u0438\u0437 DHCP-\u0441\u0435\u0440\u0432\u0435\u0440\u0430 Kea 1.6.0, \u0438\u0434\u0443\u0449\u0435\u0433\u043e.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" 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