{"id":107267,"date":"2023-03-14T12:48:14","date_gmt":"2023-03-14T10:48:14","guid":{"rendered":"https:\/\/prohoster.info\/?p=107267"},"modified":"2023-03-15T19:12:55","modified_gmt":"2023-03-15T17:12:55","slug":"vypusk-paketnogo-filtra-nftables-1-0-7","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pl\/blog\/news\/vypusk-paketnogo-filtra-nftables-1-0-7","title":{"rendered":"Wydanie filtr\u00f3w pakiet\u00f3w nftables 1.0.7","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Opublikowano wersj\u0119 filtra pakiet\u00f3w nftables 1.0.7, kt\u00f3ra ujednolica interfejsy filtracji pakiet\u00f3w dla IPv4, IPv6, ARP i most\u00f3w sieciowych (ma na celu zast\u0105pienie iptables, ip6tables, arptables i ebtables). W pakiecie nftables znajduj\u0105 si\u0119 komponenty filtru pakiet\u00f3w dzia\u0142aj\u0105ce w przestrzeni u\u017cytkownika, podczas gdy na poziomie j\u0105dra pracuje podsystem nf_tables, wchodz\u0105cy w sk\u0142ad j\u0105dra Linux od wersji 3.13. Na poziomie j\u0105dra dostarczany jest jedynie og\u00f3lny interfejs, niezale\u017cny od konkretnego protoko\u0142u, kt\u00f3ry zapewnia podstawowe funkcje ekstrakcji danych z pakiet\u00f3w, wykonywania 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=\"4335\">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 zmiany:  <\/p>\n<ul>\n<li class=\"l\"> Dla system\u00f3w z j\u0105dem Linux 6.2+ dodano wsparcie dla mapowania protoko\u0142\u00f3w vxlan, geneve, gre i gretap, co umo\u017cliwia stosowanie prostych wyra\u017ce\u0144 do sprawdzania nag\u0142\u00f3wk\u00f3w w opakowanych pakietach. Na przyk\u0142ad, aby sprawdzi\u0107 <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pl\/lir\/ipv4\/\"   title=\"adresy IP\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"711\">adresy IP<\/a> W nag\u0142\u00f3wku zagnie\u017cd\u017conego pakietu z VxLAN, teraz mo\u017cna stosowa\u0107 regu\u0142y (bez potrzeby wst\u0119pnego deinkapsulowania nag\u0142\u00f3wka VxLAN i przypisywania filtra do interfejsu vxlan0):          \u2026 udp dport 4789 vxlan ip protocol udp        \u2026 udp dport 4789 vxlan ip saddr 1.2.3.0\/24        \u2026 udp dport 4789 vxlan ip saddr . vxlan ip daddr { 1.2.3.4 . 4.3.2.1 }\n<li class=\"l\"> Wprowadzono wsparcie dla automatycznego scalania pozosta\u0142o\u015bci po cz\u0119\u015bciowym usuni\u0119ciu elementu z listy zbior\u00f3w, co pozwala na usuni\u0119cie elementu lub cz\u0119\u015bci zakresu z istniej\u0105cego zakresu (wcze\u015bniej zakres mo\u017cna by\u0142o usun\u0105\u0107 tylko w ca\u0142o\u015bci). Na przyk\u0142ad, po usuni\u0119ciu elementu 25 z listy zbior\u00f3w z zakresami 24-30 i 40-50, w li\u015bcie pozostan\u0105 24, 26-30 i 40-50. Poprawki potrzebne do dzia\u0142ania automatycznego scalania b\u0119d\u0105 zaproponowane w korekcyjnych wydaniach stabilnych ga\u0142\u0119zi j\u0105dra 5.10+.              # nft list ruleset        table ip x {            set y {                typeof tcp dport                flags interval                auto-merge                elements = { 24-30, 40-50 }            }        }          # nft delete element ip x y { 25 }          # nft list ruleset        table ip x {            set y {                typeof tcp dport                flags interval                auto-merge                elements = { 24, 26-30, 40-50 }            }        }\n<li class=\"l\"> Zezwala si\u0119 na u\u017cycie kontaktacji i zakres\u00f3w przy mapowaniu translacji adres\u00f3w (NAT).      table ip nat {        chain prerouting {            type nat hook prerouting priority dstnat; policy accept;            dnat to ip daddr . tcp dport map { 10.1.1.136 . 80 : 1.1.2.69 . 1024,   10.1.1.10-10.1.1.20 . 8888-8889 : 1.1.2.69 . 2048-2049 } persistent       }    }\n<li class=\"l\"> Dodano wsparcie dla wyra\u017cenia \u00ablast\u00bb, kt\u00f3re pozwala na sprawdzenie czasu ostatniego u\u017cycia elementu regu\u0142y lub zestawu. Mo\u017cliwo\u015b\u0107 ta jest dost\u0119pna od j\u0105dra Linux 5.14.        table ip x {        set y {            typeof ip daddr . tcp dport            size 65535            flags dynamic,timeout            last            timeout 1h        }          chain z {            type filter hook output priority filter; policy accept;            update @y { ip daddr . tcp dport }        }    }      # nft list set ip x y    table ip x {        set y {            typeof ip daddr . tcp dport            size 65535            flags dynamic,timeout            last            timeout 1h            elements = { 172.217.17.14 . 443 last used 1s591ms timeout 1h expires 59m58s409ms,                         172.67.69.19 . 443 last used 4s636ms timeout 1h expires 59m55s364ms,                         142.250.201.72 . 443 last used 4s748ms timeout 1h expires 59m55s252ms,                         172.67.70.134 . 443 last used 4s688ms timeout 1h expires 59m55s312ms,                         35.241.9.150 . 443 last used 5s204ms timeout 1h expires 59m54s796ms,                         138.201.122.174 . 443 last used 4s537ms timeout 1h expires 59m55s463ms,                         34.160.144.191 . 443 last used 5s205ms timeout 1h expires 59m54s795ms,                         130.211.23.194 . 443 last used 4s436ms timeout 1h expires 59m55s564ms }           }    }\n<li class=\"l\"> Dodano mo\u017cliwo\u015b\u0107 definiowania kwot w zestawach. Na przyk\u0142ad, aby okre\u015bli\u0107 kwot\u0119 na transfer danych dla ka\u017cdego docelowego adresu IP, mo\u017cna poda\u0107:      table netdev x {        set y {            typeof ip daddr            size 65535            quota over 10000 mbytes        }          chain y {            type filter hook egress device \u00abeth0\u00bb priority filter; policy accept;            ip daddr @y drop        }    }      # nft add element inet x y { 8.8.8.8 }    # ping -c 2 8.8.8.8       # nft list ruleset    table netdev x {        set y {            type ipv4_addr            size 65535            quota over 10000 mbytes            elements = { 8.8.8.8 quota over 10000 mbytes used 196 bytes }        }          chain y {            type filter hook egress device \u00abeth0\u00bb priority filter; policy accept;            ip daddr @y drop        }    }\n<li class=\"l\"> Zezwolono na u\u017cywanie sta\u0142ych w listach set. Na przyk\u0142ad, przy u\u017cyciu jako klucza listy adresu docelowego oraz identyfikatora VLAN mo\u017cna bezpo\u015brednio poda\u0107 numer VLAN (daddr . 123):          table netdev t {            set s {                typeof ether saddr . vlan id                size 2048                flags dynamic,timeout                timeout 1m            }              chain c {                type filter hook ingress device eth0 priority 0; policy accept;                ether type != 8021q update @s { ether daddr . 123 } counter            }        }\n<li class=\"l\"> Dodano now\u0105 komend\u0119 \u00abdestroy\u00bb do bezwarunkowego usuwania obiekt\u00f3w (w przeciwie\u0144stwie do komendy delete, nie generuje ENOENT przy pr\u00f3bie usuni\u0119cia nieistniej\u0105cego obiektu). Do dzia\u0142ania wymaga co najmniej j\u0105dra Linux 6.3-rc.         destroy table ip filter        <\/ul>\n<p>\u0179r\u00f3d\u0142o: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=58791\">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 1.0.7, \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). \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 \u044f\u0434\u0440\u0430 \u0440\u0430\u0431\u043e\u0442\u0443 \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0438\u0432\u0430\u0435\u0442 \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u0430 nf_tables, \u0432\u0445\u043e\u0434\u044f\u0449\u0430\u044f \u0432 \u0441\u043e\u0441\u0442\u0430\u0432 \u044f\u0434\u0440\u0430 Linux \u043d\u0430\u0447\u0438\u043d\u0430\u044f \u0441 \u0432\u044b\u043f\u0443\u0441\u043a\u0430 [&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-107267","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 1.0.7, \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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