{"id":206,"date":"2026-01-27T17:51:13","date_gmt":"2026-01-27T09:51:13","guid":{"rendered":"https:\/\/pc.wuhanioe.com\/index.php\/2026\/01\/27\/ipsec-vpn-%e8%83%bd%e8%bf%9e%e4%b8%8a%e5%8d%b4%e4%b8%8d%e9%80%9a%ef%bc%9f%e4%bb%8e%e5%8d%8f%e5%95%86%e5%88%b0%e7%ad%96%e7%95%a5%e7%9a%84%e9%80%90%e5%b1%82%e6%8e%92%e6%9f%a5%e5%ae%9e%e6%88%98\/"},"modified":"2026-01-27T17:51:13","modified_gmt":"2026-01-27T09:51:13","slug":"ipsec-vpn-%e8%83%bd%e8%bf%9e%e4%b8%8a%e5%8d%b4%e4%b8%8d%e9%80%9a%ef%bc%9f%e4%bb%8e%e5%8d%8f%e5%95%86%e5%88%b0%e7%ad%96%e7%95%a5%e7%9a%84%e9%80%90%e5%b1%82%e6%8e%92%e6%9f%a5%e5%ae%9e%e6%88%98","status":"publish","type":"post","link":"https:\/\/pc.wuhanioe.com\/index.php\/2026\/01\/27\/ipsec-vpn-%e8%83%bd%e8%bf%9e%e4%b8%8a%e5%8d%b4%e4%b8%8d%e9%80%9a%ef%bc%9f%e4%bb%8e%e5%8d%8f%e5%95%86%e5%88%b0%e7%ad%96%e7%95%a5%e7%9a%84%e9%80%90%e5%b1%82%e6%8e%92%e6%9f%a5%e5%ae%9e%e6%88%98\/","title":{"rendered":"IPSec VPN \u80fd\u8fde\u4e0a\u5374\u4e0d\u901a\uff1f\u4ece\u534f\u5546\u5230\u7b56\u7565\u7684\u9010\u5c42\u6392\u67e5\u5b9e\u6218"},"content":{"rendered":"

\u5f88\u591a\u5de5\u7a0b\u5e08\u9047\u5230 IPSec VPN \u65f6\u90fd\u6709\u8fd9\u6837\u7684\u56f0\u60d1\uff1a\u96a7\u9053\u72b6\u6001\u663e\u793a\u300e\u5df2\u5efa\u7acb\u300f\uff0c\u53ef\u4e1a\u52a1\u7cfb\u7edf\u5c31\u662f ping \u4e0d\u901a\u3001\u8fde\u4e0d\u4e0a\u3002\u95ee\u9898\u5f80\u5f80\u4e0d\u5728\u52a0\u5bc6\u7b97\u6cd5\u672c\u8eab\uff0c\u800c\u5728\u611f\u5174\u8da3\u6d41\u3001NAT \u7a7f\u8d8a\u3001\u8def\u7531\u56de\u5305\u6216 MTU \u5206\u7247\u3002\u672c\u6587\u6309\u5206\u5c42\u601d\u8def\u5e26\u4f60\u9010\u4e00\u6392\u67e5\uff0c\u5b9a\u4f4d\u771f\u6b63\u65ad\u70b9\u3002<\/p>\n

\u4e00\u3001\u786e\u8ba4\u9636\u6bb5\u4e00\u4e0e\u9636\u6bb5\u4e8c\u662f\u5426\u771f\u7684\u534f\u5546\u6210\u529f<\/h2>\n

\u4e0d\u8981\u53ea\u770b\u754c\u9762\u4e0a\u7684\u300e\u8fde\u63a5\u300f\u5b57\u6837\uff0c\u8981\u7528\u547d\u4ee4\u884c\u770b\u771f\u5b9e\u72b6\u6001\u3002<\/p>\n

    \n
  1. \u5728\u8def\u7531\u5668\u6216\u9632\u706b\u5899\u6267\u884c show crypto isakmp sa<\/strong>\uff08\u6216 ipsec sa\uff09\uff0c\u72b6\u6001\u5e94\u4e3a QM_IDLE \u800c\u975e MM_xxxx\uff0c\u540e\u8005\u8bf4\u660e\u9636\u6bb5\u4e00\u5361\u5728\u91ce\u86ee\u6a21\u5f0f\u3002<\/li>\n
  2. \u6267\u884c show crypto ipsec sa<\/strong>\uff0c\u786e\u8ba4\u5165\u5411\/\u51fa\u5411 SPI \u5df2\u751f\u6210\uff0c\u4e14 encap\/decap \u8ba1\u6570<\/strong>\u5728\u589e\u957f\u3002\u82e5\u8ba1\u6570\u4e0d\u589e\u957f\uff0c\u8bf4\u660e\u6d41\u91cf\u6ca1\u547d\u4e2d\u7b56\u7565\u3002<\/li>\n
  3. \u67e5\u770b\u7cfb\u7edf\u65e5\u5fd7\u91cc\u662f\u5426\u6709 NO_PROPOSAL_CHOSEN<\/strong> \u6216 INVALID_ID_INFORMATION<\/strong>\uff0c\u8fd9\u7c7b\u62a5\u9519\u51e0\u4e4e\u90fd\u6307\u5411\u4e24\u7aef\u7b56\u7565\u4e0d\u5339\u914d\u3002<\/li>\n<\/ol>\n

    \u4e8c\u3001\u68c0\u67e5\u611f\u5174\u8da3\u6d41\u662f\u5426\u5bf9\u79f0<\/h2>\n

    \u4e24\u7aef ACL\uff08\u6216 traffic selector\uff09\u5fc5\u987b\u4e92\u4e3a\u955c\u50cf\uff0c\u4e14\u63a9\u7801\u4e00\u81f4\u3002<\/p>\n

      \n
    1. \u6838\u5bf9\u672c\u5730\u5b50\u7f51\u4e0e\u5bf9\u7aef\u5b50\u7f51\u662f\u5426\u5199\u53cd\uff0c\u5e38\u89c1\u9519\u8bef\u662f\u628a\u6e90\u548c\u76ee\u7684\u5bf9\u79f0\u5199\u6210\u4e86\u5b8c\u5168\u76f8\u7b49\u3002<\/li>\n
    2. \u786e\u8ba4\u534f\u8bae\u4e0e\u7aef\u53e3\u662f\u5426\u4e00\u81f4\uff1a\u4e00\u7aef\u5199 ip<\/strong> \u4efb\u610f\uff0c\u53e6\u4e00\u7aef\u5199 tcp\/443\uff0c\u8fd9\u79cd\u4e0d\u5bf9\u79f0\u4f1a\u8ba9\u534f\u5546\u76f4\u63a5\u5931\u8d25\u3002<\/li>\n
    3. \u82e5\u4f7f\u7528 VTI \u6216\u8def\u7531\u578b\u96a7\u9053\uff0c\u786e\u8ba4\u5df2\u7528 ip route<\/strong> \u628a\u6d41\u91cf\u5f15\u5230 tunnel \u63a5\u53e3\uff0c\u800c\u4e0d\u662f\u4f9d\u8d56 ACL \u89e6\u53d1\u3002<\/li>\n<\/ol>\n

      \u4e09\u3001\u6392\u67e5 NAT \u7a7f\u8d8a\u4e0e NAT-T<\/h2>\n
        \n
      1. \u82e5 VPN \u8bbe\u5907\u80cc\u540e\u8fd8\u6709\u4e00\u5c42 NAT\uff08\u5982\u5149\u732b\uff09\uff0c\u52a1\u5fc5\u5f00\u542f NAT-T\uff08UDP 4500\uff09<\/strong>\uff0c\u5426\u5219 ESP \u62a5\u6587\u4f1a\u88ab\u4e0a\u5c42 NAT \u4e22\u5f03\u3002<\/li>\n
      2. \u68c0\u67e5\u4e2d\u95f4\u9632\u706b\u5899\u662f\u5426\u653e\u901a UDP 500 \u4e0e UDP 4500\uff0c\u5f88\u591a\u4f01\u4e1a\u53ea\u5f00 500 \u5bfc\u81f4\u80fd\u534f\u5546\u7b2c\u4e00\u9636\u6bb5\u5374\u5efa\u4e0d\u8d77\u7b2c\u4e8c\u9636\u6bb5\u3002<\/li>\n
      3. \u786e\u8ba4\u4e24\u7aef NAT \u63a2\u6d4b\u4e00\u81f4\uff0c\u4e00\u7aef\u5f00\u4e00\u7aef\u5173\u4f1a\u9020\u6210 \u7aef\u53e3\u6d6e\u52a8\u4e0d\u4e00\u81f4<\/strong>\u3002<\/li>\n<\/ol>\n

        \u56db\u3001\u786e\u8ba4\u8def\u7531\u4e0e\u56de\u5305\u8def\u5f84<\/h2>\n
          \n
        1. \u5728\u670d\u52a1\u5668\u4fa7\u7528 tracert \/ traceroute<\/strong> \u786e\u8ba4\u56de\u5305\u8d70\u7684\u662f VPN \u96a7\u9053\u800c\u975e\u9ed8\u8ba4\u7f51\u5173\u3002<\/li>\n
        2. \u68c0\u67e5\u5bf9\u7aef\u662f\u5426\u6709\u5230\u8fbe\u4f60\u65b9\u5b50\u7f51\u7684\u56de\u6307\u8def\u7531\uff0c\u7f3a\u56de\u7a0b\u8def\u7531\u662f\u300e\u80fd\u8fde\u4e0d\u901a\u300f\u7684\u5934\u53f7\u539f\u56e0\u3002<\/li>\n
        3. \u82e5\u672c\u5730\u6709\u591a\u51fa\u53e3\uff0c\u786e\u8ba4\u7b56\u7565\u8def\u7531\u628a VPN \u6d41\u91cf\u56fa\u5b9a\u5230\u6b63\u786e\u51fa\u63a5\u53e3\u3002<\/li>\n<\/ol>\n

          \u4e94\u3001MTU \u4e0e\u5206\u7247\u95ee\u9898<\/h2>\n
            \n
          1. IPSec \u5c01\u88c5\u4f1a\u589e\u52a0 50\u201380 \u5b57\u8282\u5f00\u9500\uff0c\u628a\u63a5\u53e3 MTU \u964d\u5230 1400<\/strong> \u5e76\u8bbe tcp adjust-mss 1360<\/strong> \u8bd5\u8bd5\u3002<\/li>\n
          2. \u7528 ping -f -l 1400 \u5bf9\u7aefIP<\/strong> \u6d4b\u4e0d\u5206\u7247\u6700\u5927\u5305\uff0c\u9010\u6b65\u51cf\u5c0f\u5b9a\u4f4d\u5206\u7247\u4e22\u5f03\u70b9\u3002<\/li>\n<\/ol>\n

            \u6280\u672f\u603b\u7ed3\uff1a<\/strong>IPSec\u300e\u80fd\u8fde\u4e0d\u901a\u300f\u516b\u6210\u51fa\u5728\u7b56\u7565\u4e0d\u5bf9\u79f0\u3001\u7f3a\u56de\u7a0b\u8def\u7531\u6216 NAT-T \u6ca1\u5f00\u3002\u5148\u505a show \u770b SPI \u8ba1\u6570\uff0c\u518d\u6838\u5bf9\u611f\u5174\u8da3\u6d41\u4e0e\u8def\u7531\uff0c\u6700\u540e\u8c03 MTU\uff0c\u57fa\u672c\u90fd\u80fd\u5b9a\u4f4d\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

            IPSec \u80fd\u8fde\u4e0d\u901a\u591a\u56e0\u7b56\u7565\u4e0d\u5bf9\u79f0\u3001\u7f3a\u56de\u7a0b\u8def\u7531\u6216 NAT-T \u672a\u5f00\uff0c\u6309\u5c42\u6392\u67e5\u5373\u53ef\u5b9a\u4f4d\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"categories":[5],"tags":[],"class_list":["post-206","post","type-post","status-publish","format-standard","hentry","category-5"],"_links":{"self":[{"href":"https:\/\/pc.wuhanioe.com\/index.php\/wp-json\/wp\/v2\/posts\/206","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pc.wuhanioe.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pc.wuhanioe.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pc.wuhanioe.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/pc.wuhanioe.com\/index.php\/wp-json\/wp\/v2\/comments?post=206"}],"version-history":[{"count":0,"href":"https:\/\/pc.wuhanioe.com\/index.php\/wp-json\/wp\/v2\/posts\/206\/revisions"}],"wp:attachment":[{"href":"https:\/\/pc.wuhanioe.com\/index.php\/wp-json\/wp\/v2\/media?parent=206"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pc.wuhanioe.com\/index.php\/wp-json\/wp\/v2\/categories?post=206"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pc.wuhanioe.com\/index.php\/wp-json\/wp\/v2\/tags?post=206"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}