{"id":103407,"date":"2022-02-22T03:36:42","date_gmt":"2022-02-22T01:36:42","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-paketnogo-filtra-nftables-1-0-2"},"modified":"2022-02-22T03:36:42","modified_gmt":"2022-02-22T01:36:42","slug":"vypusk-paketnogo-filtra-nftables-1-0-2","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pl\/blog\/news\/vypusk-paketnogo-filtra-nftables-1-0-2","title":{"rendered":"Wydanie filtru pakiet\u00f3w nftables 1.0.2","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Opublikowano wersj\u0119 filtrowania pakiet\u00f3w nftables 1.0.2, ujednolicaj\u0105c\u0105 interfejsy filtrowania pakiet\u00f3w dla IPv4, IPv6, ARP i most\u00f3w sieciowych (ma na celu zast\u0105pienie iptables, ip6tables, arptables i ebtables). Wymagane do dzia\u0142ania zmiany w wersji nftables 1.0.2 zosta\u0142y uwzgl\u0119dnione w j\u0105drze Linuksa 5.17-rc.      <\/p>\n<p>W pakiecie nftables zawarte s\u0105 komponenty filtr\u00f3w pakietowych, kt\u00f3re dzia\u0142aj\u0105 w przestrzeni u\u017cytkownika, podczas gdy na poziomie j\u0105dra dzia\u0142ania szczeg\u00f3ln\u0105 rol\u0119 pe\u0142ni subsystem nf_tables, wchodz\u0105cy w sk\u0142ad j\u0105dra Linux od wersji 3.13. Na poziomie j\u0105dra udost\u0119pniany jest tylko og\u00f3lny interfejs, niezale\u017cny od konkretnego protoko\u0142u, kt\u00f3ry zapewnia podstawowe funkcje wydobywania danych z pakiet\u00f3w, realizacji operacji na danych oraz zarz\u0105dzania przep\u0142ywem.    <\/p>\n<p>Bezpo\u015brednio zasady filtracji i specyficzne dla protoko\u0142\u00f3w komponenty s\u0105 kompilowane do bajtowego kodu w przestrzeni u\u017cytkownika, po czym ten kod bajtowy jest \u0142adowany do j\u0105dra za pomoc\u0105 interfejsu Netlink i wykonywany w j\u0105drze w specjalnej <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pl\/vps\/abuzoustojchivye-vps\/\"   title=\"maszynie wirtualnej\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"4319\">maszynie wirtualnej<\/a>, przypominaj\u0105cej BPF (Berkeley Packet Filters). Tego typu podej\u015bcie pozwala znacznie zmniejszy\u0107 rozmiar kodu filtracji dzia\u0142aj\u0105cego na poziomie j\u0105dra i przenie\u015b\u0107 wszystkie funkcje parsowania zasad i logiki pracy z protoko\u0142ami do przestrzeni u\u017cytkownika.    <\/p>\n<p>G\u0142\u00f3wne nowo\u015bci:  <\/p>\n<ul>\n<li class=\"l\"> Dodano tryb optymalizacji regu\u0142, kt\u00f3ry mo\u017cna w\u0142\u0105czy\u0107 za pomoc\u0105 nowej opcji &#171;-o&#187; (&#171;&#8212;optimize&#187;), kt\u00f3r\u0105 mo\u017cna \u0142\u0105czy\u0107 z opcj\u0105 &#171;&#8212;check&#187; w celu sprawdzenia i optymalizacji zmian w pliku zestawu regu\u0142 bez jego faktycznego za\u0142adowania. Optymalizacja pozwala na \u0142\u0105czenie podobnych regu\u0142, na przyk\u0142ad regu\u0142y:          meta iifname eth1 ip saddr 1.1.1.1 ip daddr 2.2.2.3 accept        meta iifname eth1 ip saddr 1.1.1.2 ip daddr 2.2.2.5 accept        ip saddr 1.1.1.1 ip daddr 2.2.2.2 accept        ip saddr 2.2.2.2 ip daddr 3.3.3.3 drop\n<p>zostan\u0105 po\u0142\u0105czone w           meta iifname . ip saddr . ip daddr { eth1 . 1.1.1.1 . 2.2.2.3, eth1 .   1.1.1.2 . 2.2.2.5 } accept        ip saddr . ip daddr vmap { 1.1.1.1 . 2.2.2.2 : accept, 2.2.2.2 . 3.3.3.3   : drop }    <\/p>\n<p>Przyk\u0142ad u\u017cycia:       # nft -c -o -f ruleset.test     \u0141\u0105czenie:       ruleset.nft:16:3-37:  ip daddr 192.168.0.1 counter accept       ruleset.nft:17:3-37:  ip daddr 192.168.0.2 counter accept       ruleset.nft:18:3-37:  ip daddr 192.168.0.3 counter accept     w:       ip daddr { 192.168.0.1, 192.168.0.2, 192.168.0.3 } counter packets 0 bytes 0 accept      <\/p>\n<li class=\"l\"> W listach set zaimplementowano mo\u017cliwo\u015b\u0107 wskazywania opcji ip i tcp, a tak\u017ce chunk\u00f3w sctp:            set s5 {                 typeof ip option ra value                 elements = { 1, 1024 }          }            set s7 {                 typeof sctp chunk init num-inbound-streams                 elements = { 1, 4 }          }            chain c5 {                 ip option ra value @s5 accept          }            chain c7 {                 sctp chunk init num-inbound-streams @s7 accept          }\n<li class=\"l\"> Dodano wsparcie dla opcji TCP fastopen, md5sig i mptcp.\n<li class=\"l\"> Dodano wsparcie dla u\u017cycia w dopasowaniach podtypu mp-tcp:            tcp option mptcp subtype 1\n<li class=\"l\"> Udoskonalono kod filtrowania dzia\u0142aj\u0105cy po stronie j\u0105dra.\n<li class=\"l\"> Dla flowtable wdro\u017cono pe\u0142ne wsparcie dla formatu JSON.\n<li class=\"l\"> Wprowadzono mo\u017cliwo\u015b\u0107 u\u017cycia akcji &#171;reject&#187; w operacjach dopasowywania ramek Ethernet.            ether saddr aa:bb:cc:dd:ee:ff ip daddr 192.168.0.1 reject      <\/ul>\n<p>\u0179r\u00f3d\u0142o: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=56739\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0432\u044b\u043f\u0443\u0441\u043a \u043f\u0430\u043a\u0435\u0442\u043d\u043e\u0433\u043e \u0444\u0438\u043b\u044c\u0442\u0440\u0430 nftables 1.0.2, \u0443\u043d\u0438\u0444\u0438\u0446\u0438\u0440\u0443\u044e\u0449\u0435\u0433\u043e \u0438\u043d\u0442\u0435\u0440\u0444\u0435\u0439\u0441\u044b \u0444\u0438\u043b\u044c\u0442\u0440\u0430\u0446\u0438\u0438 \u043f\u0430\u043a\u0435\u0442\u043e\u0432 \u0434\u043b\u044f IPv4, IPv6, ARP \u0438 \u0441\u0435\u0442\u0435\u0432\u044b\u0445 \u043c\u043e\u0441\u0442\u043e\u0432 (\u043d\u0430\u0446\u0435\u043b\u0435\u043d \u043d\u0430 \u0437\u0430\u043c\u0435\u043d\u0443 iptables, ip6table, arptables \u0438 ebtables). \u041d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u044b\u0435 \u0434\u043b\u044f \u0440\u0430\u0431\u043e\u0442\u044b \u0432\u044b\u043f\u0443\u0441\u043a\u0430 nftables 1.0.2 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u044b \u0432 \u0441\u043e\u0441\u0442\u0430\u0432 \u044f\u0434\u0440\u0430 Linux 5.17-rc. \u0412 \u043f\u0430\u043a\u0435\u0442 nftables \u0432\u0445\u043e\u0434\u044f\u0442 \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u044b \u043f\u0430\u043a\u0435\u0442\u043d\u043e\u0433\u043e \u0444\u0438\u043b\u044c\u0442\u0440\u0430, \u0440\u0430\u0431\u043e\u0442\u0430\u044e\u0449\u0438\u0435 \u0432 \u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0441\u0442\u0432\u0435 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f, \u0432 \u0442\u043e \u0432\u0440\u0435\u043c\u044f \u043a\u0430\u043a \u043d\u0430 \u0443\u0440\u043e\u0432\u043d\u0435 [&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-103407","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0432\u044b\u043f\u0443\u0441\u043a \u043f\u0430\u043a\u0435\u0442\u043d\u043e\u0433\u043e \u0444\u0438\u043b\u044c\u0442\u0440\u0430 nftables 1.0.2, \u0443\u043d\u0438\u0444\u0438\u0446\u0438\u0440\u0443\u044e\u0449\u0435\u0433\u043e \u0438\u043d\u0442\u0435\u0440\u0444\u0435\u0439\u0441\u044b 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