{"id":1921,"date":"2010-12-03T10:23:07","date_gmt":"2010-12-03T10:23:07","guid":{"rendered":"http:\/\/www.icocean.com\/blog\/?p=1921"},"modified":"1970-01-01T07:00:00","modified_gmt":"1970-01-01T07:00:00","slug":"openvpn%E7%9A%84%E6%95%88%E7%8E%87%E9%97%AE%E9%A2%98","status":"publish","type":"post","link":"https:\/\/www.icocean.com\/blog\/?p=1921","title":{"rendered":"OpenVPN\u7684\u6548\u7387\u95ee\u9898"},"content":{"rendered":"

dog250 \u53d1\u8868\u4e8e @ 2010\u5e7406\u670801\u65e5\u300022:32:00<\/p>\n

OpenVPN\u7531\u4e8e\u5176\u8bbe\u8ba1\u95ee\u9898\uff0c\u901f\u5ea6\u5f88\u6162\uff0c\u6709\u4eba\u8ba4\u4e3a\u662f\u7531\u4e8e\u52a0\u5bc6\u89e3\u5bc6\u5bfc\u81f4\u4e86\u901f\u5ea6\u53d8\u6162\uff0c\u5f53\u5c06cipher\u8bbe\u7f6e\u6210none\u4e4b\u540e\uff0c\u53d1\u73b0\u6548\u7387\u5e76\u6ca1\u6709\u63d0\u5347\uff0c\u5e76\u4e14\u4f7f\u7528\u6700\u6162\u7684cipher\uff0c\u4f7f\u7528\u6bd4\u8f83\u597d\u7684cpu\uff0c\u8bbe\u7f6e\u6bd4\u8f83\u5927\u7684txqueuelen\uff0c\u4f7f\u7528\u6bd4\u8f83\u5feb\u7684\u7f51\u5361–100baseT- FD\uff0cOpenVPN\u7684\u6548\u7387\u8fd8\u662f\u4e0d\u884c\uff0ccpu\u4f7f\u7528\u7387\u6ca1\u591a\u5c11\uff0c\u90a3\u4e48\u53ef\u4ee5\u8ba4\u4e3a\u63d0\u5347cpu\u6027\u80fd\u5df2\u7ecf\u4e8e\u4e8b\u65e0\u8865\u4e86\uff0c\u540e\u6765\u624d\u53d1\u73b0\u662fOpenVPN\u81ea\u8eab\u7684\u95ee\u9898\uff0c\u901a\u8fc7\u6e90\u4ee3\u7801\u770b\u5f97\u51faOpenVPN\u662f\u4e00\u4e2a\u5355\u8fdb\u7a0b\u5355\u7ebf\u7a0b\u7684\u7a0b\u5e8f\uff0c\u6574\u4e2a\u7a0b\u5e8f\u542f\u52a8\u540e\u5c31\u662f\u4e00\u4e2a\u5927\u7684\u5faa\u73af\uff0c\u7ed3\u6784\u5982\u4e0b\uff1a<\/p>\n

while (true) {
    select\/poll\/epoll
    do-io[tun-io\/socket-io]
}<\/p>\n

\u8fd9\u6837\u7684\u7ed3\u6784\u6548\u7387\u80af\u5b9a\u4e0d\u4f1a\u592a\u9ad8\uff0c\u56e0\u6b64\u5c31\u4e0d\u8981\u518d\u60f3\u4ece\u914d\u7f6e\u4e0a\u5bfb\u627e\u4f18\u5316\u7684\u7a81\u7834\u53e3\u4e86\uff0c\u7136\u800c\u4fee\u6539\u6e90\u4ee3\u7801\u53c8\u592a\u9ebb\u70e6\uff0c\u4e8e\u662f\u8003\u8651\u591a\u8fdb\u7a0b\u7684\u65b9\u5f0f\uff0c\u90a3\u5c31\u662f\u5728\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u5206\u522b\u542f\u52a8\u6570\u91cf\u76f8\u540c\u7684N\u591a\u4e2aOpenVPN\u8fdb\u7a0b\uff0c\u4e00\u5bf9\u4e00\u7684\u8fde\u63a5\uff0c\u8fd9\u5c31\u76f8\u5f53\u4e8e\u5efa\u7acb\u4e86N\u6761\u96a7\u9053\uff0c\u5355\u6761\u96a7\u9053\u4e0d\u5bbd\uff0c\u4f46\u662f\u53ef\u4ee5\u6709\u591a\u6761\u96a7\u9053\uff0c\u7136\u540e\u5927\u6d41\u91cf\u7531\u6240\u6709\u8fd9\u4e9b\u96a7\u9053\u5206\u62c5\uff0c\u6211\u4eec\u9700\u8981\u5efa\u7acb\u591a\u6761\u96a7\u9053\uff0c\u7136\u540e\u60f3\u529e\u6cd5\u5c06\u6570\u636e\u5e73\u5747\u5730(\u4e5f\u53ef\u4ee5\u4f7f\u7528\u522b\u7684\u7b56\u7565\uff0c\u5177\u4f53\u53ef\u4ee5\u7531OpenVPN\u7684–shaper\u9009\u9879\u63a7\u5236)\u653e\u5165\u8fd9\u4e9b\u96a7\u9053\uff0c\u8fd9\u5c31\u7528\u5230\u4e86\u57fa\u4e8e\u5305\u7684\u8d1f\u8f7d\u5747\u8861\uff0c\u6211\u4eec\u7684\u7c92\u5ea6\u5e94\u8be5\u8db3\u591f\u7ec6(\u4e07\u4e8b\u6709\u4e2a\u5ea6\uff0c\u4e0d\u8981\u592a\u7ec6)\uff0c\u57fa\u4e8e\u6d41\u7684\u80af\u5b9a\u4e0d\u884c\uff0c\u56e0\u4e3a\u5373\u4f7f\u662f\u540c\u4e00\u4e2a\u6d41\u7684\u6570\u636e\u6211\u4eec\u4e5f\u5e0c\u671b\u5728\u6570\u636e\u91cf\u5927\u7684\u60c5\u51b5\u4e0b\u5c06\u6570\u636e\u8fdb\u884c\u5206\u5272\uff0c\u7136\u540e\u653e\u5165\u4e0d\u540c\u7684\u96a7\u9053\uff0c\u53ea\u56e0\u4e3aOpenVPN\u5efa\u7acb\u7684\u4e00\u6761\u96a7\u9053\u592a\u7a84\u4e86\u3002\u4e8e\u662f\u80af\u5b9a\u8981\u4f7f\u7528\u57fa\u4e8e\u5305\u7684\u8d1f\u8f7d\u5747\u8861\u65b9\u6848\u4e86\uff0c\u300aMASQUERADE target\u5728\u8d1f\u8f7d\u5747\u8861\u4e2d\u5f15\u51fa\u7684\u95ee\u9898\u300b\u5df2\u7ecf\u8bf4\u4e86\uff0c\u5bf9\u96a7\u9053\u8fdb\u884cNAT\u6216\u8005\u591a\u8def\u5f84\u8def\u7531\u5e76\u4e0d\u4f1a\u5f71\u54cd\u96a7\u9053\u4e2d\u7684\u6570\u636e\uff0c\u56e0\u6b64\u57fa\u4e8e\u5305\u7684\u8d1f\u8f7d\u5747\u8861\u5728\u8fd9\u91cc\u8d77\u7801\u5728\u8fd9\u91cc\u53ef\u4ee5\u5e94\u7528\uff0c\u90a3\u4e48\u600e\u4e48\u5b9e\u73b0\u5462\uff1f\u8fd8\u662f\u8981\u6253\u8865\u4e01\uff0c\u5e76\u5165mainline\u5e0c\u671b\u4e0d\u5927\uff0c\u6211\u7684\u5b9e\u73b0\u601d\u8def\u5229\u7528\u4e86EQUALIZE\u8865\u4e01\u7684\u4e00\u90e8\u5206\u601d\u60f3\uff0c\u5c31\u662f\u4e3a\u591a\u8def\u5f84(\u53ef\u4ee5\u7406\u89e3\u6210\u9700\u8981\u8d1f\u8f7d\u5747\u8861\u7684)\u8def\u7531\u6253\u4e0aRTCF_EQUALIZE\u6807\u8bb0\uff0c\u7136\u800c\u5e76\u4e0d\u662f\u53ea\u8981\u6253\u6709\u6807\u8bb0\u7684\u8def\u7531\u90fd\u76f4\u63a5\u67e5\u627e\u8def\u7531\u8868\u800c\u4e0dcache\uff0c\u800c\u662f\u5c06\u6240\u6709\u7684\u8fd9\u4e9b\u9700\u8981\u5747\u8861\u7684\u8def\u7531\u4f5c\u4e3a\u4e00\u4e2a\u6574\u4f53\u8003\u8651\uff0c\u53ea\u6709\u6709\u4e00\u4e2a\u88ab\u8bfb\u5219\u5168\u90e8\u8bfb\u5165cache(\u5f88\u7b80\u5355\uff0c\u7528next\u5b57\u6bb5\u5373\u53ef)\uff0c\u7136\u540e\u5728\u67e5\u627ehash\u94fe\u8868\u7684\u65f6\u5019\uff0c\u53d1\u73b0\u6253\u6709\u5747\u8861\u6807\u8bb0\u7684\u8def\u7531\u5219\u5728\u8fd9\u4e9b cache\u4e2d\u6309\u7167\u7b56\u7565\u67e5\u627e\u4e00\u4e2a\u8def\u7531\u4f7f\u7528\uff0c\u5982\u679c\u5b9e\u73b0\u57fa\u4e8e\u5305\u7684\u8d1f\u8f7d\u5747\u8861\u8def\u7531\u3002<\/p>\n

     \u4ec5\u4ec5\u5b9e\u73b0\u4ee5\u4e0a\u8fd9\u4e9b\u8fd8\u4e0d\u591f\uff0c\u53ef\u80fd\u8fd8\u9700\u8981\u4fee\u6539conntrack\u6a21\u5757\u7684\u4ee3\u7801\uff0c\u56e0\u4e3a\u5982\u679c\u505anat\u7684\u8bdd\uff0c\u6309\u7167\u539f\u5148\u7684conntrack\u903b\u8f91\u5219\u4f1a\u627e\u5230\u8be5\u6d41\u7b2c\u4e00\u4e2a\u5305\u7684 nat\u9879\uff0c\u56e0\u6b64\u5c31\u4f1a\u51fa\u9519\u3002\u6211\u4eec\u8fd9\u6b21\u53ef\u80fd\u7531\u4e8e\u8d1f\u8f7d\u5747\u8861\u67e5\u627e\u5230\u4e86\u4e00\u4e2a\u4e0d\u540c\u7684\u51fa\u53e3\uff0c\u5728\u8be5\u51fa\u53e3\u4e0a\u5e94\u8be5\u4f7f\u7528\u4e0d\u540c\u7684SNAT\uff0c\u53ef\u662f\u901a\u8fc7conntrack\u627e\u5230\u7684\u6d41\u4e2d\u4fdd\u5b58\u7684nat\u5374\u662f\u7b2c\u4e00\u4e2a\u5305\u7684SNAT\u9879\uff0c\u4e8e\u662f\u5c31\u4f1a\u4e71\u6389\uff0c\u4fee\u6539\u65b9\u6848\u662f\u5728conntrack\u4e2d\u4e5f\u68c0\u67e5\u5747\u8861\u6807\u8bb0\uff0c\u5bf9\u6709\u8be5\u6807\u8bb0\u7684\u6d41\u8fdb\u884c\u201c\u7279\u6b8a\u7167\u987e\u201d\uff0c\u6bd4\u5982\u65e2\u7136\u8be5\u6d41\u53ef\u80fd\u4f1a\u88ab\u5747\u8861\u5230\u4e0d\u540c\u7684\u51fa\u53e3\uff0c\u90a3\u4e48\u5c31\u4e3a\u4e4b\u5efa\u7acb\u591a\u4e2aNAT\u9879\u4e4b\u7c7b\u7684\u3002(PS\uff1a\u5b9e\u73b0\u4e00\u4e2apatch\u5427)<\/p>\n

     \u5b9e\u73b0\u4e86\u57fa\u4e8e\u5305\u7684\u8d1f\u8f7d\u5747\u8861patch\u4e4b\u540e\uff0c\u914d\u7f6eOpenVPN\u5c31\u7b80\u5355\u4e86\uff0c\u670d\u52a1\u5668\u76d1\u542cX\uff0cX+1…X+N\u8fd9\u4e9b\u7aef\u53e3\uff0c\u5ba2\u6237\u7aef\u8fde\u63a5\u8fd9\u4e9b\u7aef\u53e3\uff0c\u8fd9\u6837\u5c31\u5efa\u7acb\u4e86 N+1\u6761\u96a7\u9053\uff0c\u7136\u540e\u5728\u5ba2\u6237\u7aef\u505aSNAT(\u4e5f\u53ef\u4ee5\u4e0d\u505a\uff0cNAT\u4e3b\u8981\u662f\u4e3a\u4e86\u9694\u79bb\u7f51\u6bb5\uff0c\u5728\u76ee\u7684\u4e3b\u673a\u4e4b\u524d\u7684\u6700\u540e\u4e00\u4e2a\u8def\u7531\u5668\u7684\u76ee\u7684\u4e3b\u673a\u7f51\u6bb5\u63a5\u53e3\u505aSNAT\u662f\u4e3a\u4e86\u4e0d\u4fee\u6539\u76ee\u7684\u4e3b\u673a\u7684\u914d\u7f6e\uff0c\u6bd4\u5982\u9ed8\u8ba4\u7f51\u5173)\uff1a
SNAT –to-source tun0\u7684\u865a\u62df\u7f51\u7edc\u5730\u5740
…
SNAT –to-source tunN\u7684\u865a\u62df\u7f51\u7edc\u5730\u5740<\/p>\n

      \u5982\u679c\u4f7f\u7528\u57fa\u4e8e\u6d41\u7684\u8d1f\u8f7d\u5747\u8861\uff0c\u4e5f\u5c31\u662flinux\u5185\u6838\u4e2d\u73b0\u5728\u5b9e\u73b0\u7684\u90a3\u4e2a\uff0c\u90a3\u4e48\u53ea\u6709\u5728\u4e0d\u540c\u7684\u673a\u5668\u8bbf\u95ee\u540c\u4e00\u4e2a\u673a\u5668\u7684\u65f6\u5019\u624d\u4f1a\u5747\u8861\uff0c\u56e0\u4e3a\u5b83\u4eec\u867d\u7136\u4f7f\u7528\u4e00\u6761\u8def\u7531\uff0c\u4f46\u5374\u662f\u4e0d\u540c\u7684\u6d41\uff0c\u7406\u8bba\u4e0a\u603b\u7684\u901f\u5ea6\u4f1a\u662f\u5355\u4e2aOpenVPN\u7684\u901f\u5ea6\u4e58\u4ee5\u8fdb\u7a0b\u6570\u91cf\uff0c\u4f46\u662f\u4e5f\u8981\u53d7\u9650\u4e8e\u7269\u7406\u7f51\u5361\u7684\u901f\u5ea6\uff1b\u5982\u679c\u901a\u8fc7\u5728\u7528\u6237\u7a7a\u95f4\u5b9a\u671fflush\u6389\u5185\u6838\u8def\u7531 cache\u7684\u65b9\u5f0f\uff0c\u5219\u5728\u8d1f\u8f7d\u5747\u8861SNAT\u7684\u60c5\u51b5\u4e0b\u4f1a\u51fa\u9519\uff0c\u56e0\u4e3a\u867d\u7136\u7531\u4e8e\u8d1f\u8f7d\u5747\u8861\u540c\u4e00\u6d41\u7684\u6570\u636e\u5305\u53ef\u80fd\u88ab\u8def\u7531\u5230\u4e0d\u540c\u7684\u51fa\u53e3\uff0c\u4f46\u662f\u7531\u4e8e\u540c\u4e00\u6d41\u53ea\u6709\u4e00\u4e2anat\u9879\u88ab cache\uff0c\u56e0\u6b64\u5c31\u4f1a\u51fa\u9519\uff0c\u901f\u5ea6\u4e0d\u4f46\u4e0d\u4f1a\u63d0\u9ad8\u800c\u4e14\u4f1a\u964d\u4f4e\uff0c\u53ef\u662f\u5cf0\u503c\u53ef\u80fd\u4f1a\u5f88\u9ad8\u3002<\/p>\n

      \u4e3a\u4f55linux\u5185\u6838\u7684mainline\u4e2d\u6ca1\u6709\u5b9e\u73b0\u8fd9\u4e9b\u8d1f\u8f7d\u5747\u8861\uff0c\u770b\u770b\u8fd9\u91cc\u4e3a\u4f55\u5b9e\u73b0\u4e4b\uff0c\u4e3a\u4e86\u63d0\u5347OpenVPN\u7684\u6027\u80fd\uff0c\u5982\u679c\u6709\u4e00\u5929OpenVPN\u7684\u6027\u80fd\u63d0\u9ad8\u4e86\uff0c\u5f7b\u5e95\u4fee\u6b63\u4e86\u90a3\u4e2a\u4e11\u964b\u7684while\u5927\u5faa\u73af\uff0c\u8bd5\u95ee\u8fd8\u9700\u8981\u5728\u5185\u6838\u505a\u6587\u7ae0\u5417\uff1f\u6253patch\u53ea\u56e0\u4e3a\u96a7\u9053\u7a84\uff0c\u9488\u5bf9\u96a7\u9053\u7a84\u7684\u95ee\u9898\u6700\u597d\u7684\u89e3\u51b3\u529e\u6cd5\u662f\u628a\u96a7\u9053\u53d8\u5bbd\uff0c\u800c\u4e0d\u662f\u6316\u591a\u6761\u96a7\u9053\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

dog250 \u53d1\u8868\u4e8e @ 2010\u5e7406\u670801\u65e5\u300022:32:00 OpenVPN\u7531\u4e8e\u5176\u8bbe\u8ba1\u95ee\u9898\uff0c\u901f\u5ea6\u5f88\u6162\uff0c\u6709 […]<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[3074,1835,1533],"class_list":["post-1921","post","type-post","status-publish","format-standard","hentry","category-4","tag-openvpn","tag-1835","tag-1533","category-4-id","post-seq-1","post-parity-odd","meta-position-corners","fix"],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1921","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1921"}],"version-history":[{"count":0,"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1921\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1921"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1921"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1921"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}