{"id":1569,"date":"2025-11-16T23:55:56","date_gmt":"2025-11-16T14:55:56","guid":{"rendered":"https:\/\/mylifeisbeautiful555.net\/?page_id=1569"},"modified":"2025-11-17T11:32:13","modified_gmt":"2025-11-17T02:32:13","slug":"nat%e3%81%a8%e3%81%af","status":"publish","type":"page","link":"https:\/\/mylifeisbeautiful555.net\/?page_id=1569","title":{"rendered":"NAT\u3068\u306f"},"content":{"rendered":"\n

NAT\uff08Network Address Translation\uff09\uff1d IP\u30a2\u30c9\u30ec\u30b9\u3092\u5225\u306eIP\u30a2\u30c9\u30ec\u30b9\u306b\u66f8\u304d\u63db\u3048\u308b\u6280\u8853<\/strong><\/p>\n\n\n\n

LAN\u5185\u306e \u30d7\u30e9\u30a4\u30d9\u30fc\u30c8IP\u30a2\u30c9\u30ec\u30b9<\/strong>\uff08\u4f8b\uff1a192.168.1.10\uff09\u3092
\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u7528\u306e \u30b0\u30ed\u30fc\u30d0\u30ebIP\u30a2\u30c9\u30ec\u30b9<\/strong> \u306b\u5909\u63db\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

\u306a\u305cNAT\u304c\u5fc5\u8981\u306a\u306e\uff1f<\/h1>\n\n\n\n

\u7406\u7531\u306f\u4e3b\u306b3\u3064\uff1a<\/p>\n\n\n\n

\u2460 IPv4\u30a2\u30c9\u30ec\u30b9\u4e0d\u8db3\u306e\u89e3\u6d88\uff08\u6700\u91cd\u8981\uff09<\/strong><\/h3>\n\n\n\n

\u4f01\u696d\u3084\u5bb6\u5ead\u5185PC\u306f\u7121\u6570\u306b\u3042\u308b\u304c\u3001\u30b0\u30ed\u30fc\u30d0\u30ebIP\u306f\u6709\u9650\u3002<\/p>\n\n\n\n

\u2192 \u305f\u304f\u3055\u3093\u306e\u7aef\u672b\u3092 1\u3064\u306e\u30b0\u30ed\u30fc\u30d0\u30ebIP<\/strong> \u3067\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306b\u51fa\u305b\u308b\u4ed5\u7d44\u307f\u304c\u5fc5\u8981\u3002<\/p>\n\n\n\n

\u2461 \u5185\u90e8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5411\u4e0a<\/strong><\/h3>\n\n\n\n

\u5185\u90e8\u306e\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8IP\u304c\u5916\u90e8\u306b\u898b\u3048\u306a\u3044\u305f\u3081\u3001\u5916\u90e8\u304b\u3089\u76f4\u63a5\u653b\u6483\u3055\u308c\u306b\u304f\u3044\u3002<\/p>\n\n\n\n

\u2462 \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8a2d\u8a08\u306e\u81ea\u7531\u5ea6<\/strong><\/h3>\n\n\n\n

\u5185\u90e8\u306e\u30a2\u30c9\u30ec\u30b9\u4f53\u7cfb\u3092\u5916\u90e8\u306b\u5408\u308f\u305b\u308b\u5fc5\u8981\u304c\u306a\u304f\u306a\u308b\u3002<\/p>\n\n\n\n

NAT\u306e\u7a2e\u985e\uff083\u7a2e\u985e\u3060\u3051\u899a\u3048\u308c\u3070OK\uff09<\/h1>\n\n\n\n
\u7a2e\u985e<\/th>\u76ee\u7684<\/th>\u8aac\u660e<\/th><\/tr><\/thead>
Static NAT\uff08\u9759\u7684NAT\uff09<\/strong><\/td>1\u5bfe1<\/td>\u5185\u90e8IP\u3068\u5916\u90e8IP\u3092\u56fa\u5b9a\u5bfe\u5fdc\u3055\u305b\u308b<\/td><\/tr>
Dynamic NAT\uff08\u52d5\u7684NAT\uff09<\/strong><\/td>\u591a\u5bfe\u591a<\/td>\u5185\u90e8\u2192\u5916\u90e8\u3067\u8907\u6570\u306e\u30b0\u30ed\u30fc\u30d0\u30ebIP\u3092\u30d7\u30fc\u30eb\u3067\u4f7f\u3046<\/td><\/tr>
PAT \/ NAPT<\/strong><\/td>\u591a\u5bfe1<\/td>\u591a\u6570\u306e\u5185\u90e8\u7aef\u672b\u21921\u3064\u306e\u5916\u90e8IP\uff08\u30dd\u30fc\u30c8\u756a\u53f7\u3067\u8b58\u5225\uff09<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u4e00\u756a\u3088\u304f\u4f7f\u308f\u308c\u308b\u306e\u306f\u3069\u308c\uff1f<\/h1>\n\n\n\n

PAT<\/strong><\/h3>\n\n\n\n

\u5bb6\u5ead\u7528\u30eb\u30fc\u30bf\u3082\u4f01\u696d\u306e\u51fa\u53e3\u3082\u3001\u307b\u3068\u3093\u3069\u3053\u308c\u3002<\/p>\n\n\n\n

\u5185\u90e8100\u53f0 \u2192 \u30b0\u30ed\u30fc\u30d0\u30ebIP 1\u3064\u3067OK\u3002<\/p>\n\n\n\n

\u52d5\u4f5c\u306e\u4ed5\u7d44\u307f\uff08PAT\u4f8b\uff09<\/h1>\n\n\n\n

\u5185\u90e8PC 192.168.1.10 \u304c Web \u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u5834\u5408\uff1a<\/p>\n\n\n\n

Before NAT<\/th>After NAT<\/th><\/tr><\/thead>
192.168.1.10:50001<\/td>203.0.113.5:30010<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u5185\u90e8\u7aef\u672b\u306f\u300c192.168.1.10\u300d\u3060\u304c
\u5916\u90e8\u304b\u3089\u898b\u308b\u3068\u300c203.0.113.5\uff08\u5916\u5074IP\uff09\u300d\u306b\u898b\u3048\u308b\u3002<\/p>\n\n\n\n

\u30dd\u30fc\u30c8\u756a\u53f7\uff0830010\uff09\u3067\u3069\u306e\u5185\u90e8\u7aef\u672b\u304b\u3092\u533a\u5225\u3002<\/p>\n\n\n\n

PAT\u30c6\u30fc\u30d6\u30eb\u306e\u30a4\u30e1\u30fc\u30b8<\/h1>\n\n\n\n
\u5185\u90e8IP:Port<\/th>\u5909\u63db\u5f8cIP:Port<\/th><\/tr><\/thead>
192.168.1.10:50001<\/td>203.0.113.5:30010<\/td><\/tr>
192.168.1.11:50002<\/td>203.0.113.5:30011<\/td><\/tr>
192.168.1.12:50003<\/td>203.0.113.5:30012<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u591a\u6570\u306e\u7aef\u672b\u304c1\u3064\u306eIP\u3092\u5171\u6709\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n

Static NAT\uff08\u9759\u7684 1\u5bfe1 \u306e\u4f8b\uff09<\/h1>\n\n\n\n

Web\u30b5\u30fc\u30d0\u306a\u3069\u5916\u90e8\u516c\u958b\u3057\u305f\u3044\u3068\u304d\u306b\u4f7f\u7528\uff1a<\/p>\n\n\n\n

\u5185\u90e8IP<\/th>\u5916\u90e8IP<\/th><\/tr><\/thead>
192.168.1.100<\/td>203.0.113.10<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u3053\u308c\u306b\u3088\u308a\u5916\u90e8\u304b\u3089203.0.113.10\u306b\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\u3002<\/p>\n\n\n\n

Dynamic NAT\uff08\u30d7\u30fc\u30eb\u304b\u3089\u5272\u308a\u5f53\u3066\uff09<\/h1>\n\n\n\n

\u5185\u90e8PC \u2192 \u5916\u90e8\u3078\u51fa\u308b\u3068\u304d\u3001\u30d7\u30fc\u30eb\u304b\u3089\u30b0\u30ed\u30fc\u30d0\u30ebIP\u3092\u52d5\u7684\u306b\u5272\u5f53\uff1a<\/p>\n\n\n\n

\u30d7\u30fc\u30eb\u4f8b\uff1a203.0.113.10 \u301c 203.0.113.20<\/p>\n\n\n\n

\u5185\u90e8PC\u304c10\u53f0 \u2192 \u5916\u90e8IP\u309210\u500b\u30d0\u30e9\u30d0\u30e9\u306b\u4f7f\u3048\u308b\u3002<\/p>\n\n\n\n

NAT\u306e\u5229\u70b9\u3068\u6b20\u70b9<\/h1>\n\n\n\n

✔ \u5229\u70b9<\/h3>\n\n\n\n
    \n
  • IPv4\u30a2\u30c9\u30ec\u30b9\u7bc0\u7d04<\/li>\n\n\n\n
  • \u5185\u90e8\u30a2\u30c9\u30ec\u30b9\u306e\u4fdd\u8b77<\/li>\n\n\n\n
  • \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8a2d\u8a08\u304c\u81ea\u7531<\/li>\n<\/ul>\n\n\n\n

    ❌ \u6b20\u70b9<\/h3>\n\n\n\n
      \n
    • \u30a2\u30d7\u30ea\u306b\u3088\u3063\u3066\u306fNAT\u8d8a\u3048\u304c\u96e3\u3057\u3044\uff08SIP\/FTP\u306a\u3069\uff09<\/li>\n\n\n\n
    • \u5916\u90e8\u304b\u3089\u5185\u90e8\u3078\u76f4\u63a5\u63a5\u7d9a\u306f\u4e0d\u53ef\uff08\u9759\u7684NAT\u3084\u30dd\u30fc\u30c8\u958b\u653e\u304c\u5fc5\u8981\uff09<\/li>\n\n\n\n
    • IP\u30a2\u30c9\u30ec\u30b9\u306b\u4f9d\u5b58\u3059\u308b\u30d7\u30ed\u30c8\u30b3\u30eb\u306f\u58ca\u308c\u3084\u3059\u3044<\/li>\n<\/ul>\n\n\n\n

      IPv6\u6642\u4ee3\u306e NAT<\/h1>\n\n\n\n

      \u539f\u5247 IPv6 \u3067\u306f NAT \u306f\u4e0d\u8981\u3002
      \u305f\u3060\u3057\u7279\u6b8a\u30b1\u30fc\u30b9\u3067\u306f NPTv6<\/strong> \u3068\u3044\u3046Prefix\u5909\u63db\u304c\u5b58\u5728\u3002<\/p>\n\n\n\n

      Cisco\u30eb\u30fc\u30bf\u3067\u306eNAT\u8a2d\u5b9a\u4f8b<\/h1>\n\n\n\n

      PAT\u4f8b\uff08\u4e00\u756a\u4f7f\u3046\u69cb\u6587\uff09<\/h3>\n\n\n\n
      ip nat inside source list 1 interface GigabitEthernet0\/0 overload\naccess-list 1 permit 192.168.1.0 0.0.0.255<\/code><\/pre>\n\n\n\n
      \u307e\u3068\u3081<\/h1>\n\n\n\n
      NAT\u306f\u300c\u5185\u90e8IP ↔ \u5225\u306eIP\u300d\u306b\u5909\u63db\u3059\u308b\u6280\u8853\u3067\u3042\u308a\u3001
      \u6700\u3082\u4e00\u822c\u7684\u306a\u306e\u306f PAT\uff08\u591a\u5bfe1\uff09<\/strong> \u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
      NAT\uff08Network Address Translation\uff09\uff1d IP\u30a2\u30c9\u30ec\u30b9\u3092\u5225\u306eIP\u30a2\u30c9\u30ec\u30b9\u306b\u66f8\u304d\u63db\u3048\u308b\u6280\u8853 LAN\u5185\u306e \u30d7\u30e9\u30a4\u30d9\u30fc\u30c8IP\u30a2\u30c9\u30ec\u30b9\uff08\u4f8b\uff1a192.168.1.10\uff09\u3092\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u7528\u306e \u30b0\u30ed\u30fc\u30d0\u30ebIP […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1569","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/mylifeisbeautiful555.net\/index.php?rest_route=\/wp\/v2\/pages\/1569","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mylifeisbeautiful555.net\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/mylifeisbeautiful555.net\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/mylifeisbeautiful555.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mylifeisbeautiful555.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1569"}],"version-history":[{"count":3,"href":"https:\/\/mylifeisbeautiful555.net\/index.php?rest_route=\/wp\/v2\/pages\/1569\/revisions"}],"predecessor-version":[{"id":1575,"href":"https:\/\/mylifeisbeautiful555.net\/index.php?rest_route=\/wp\/v2\/pages\/1569\/revisions\/1575"}],"wp:attachment":[{"href":"https:\/\/mylifeisbeautiful555.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1569"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}