{"id":566,"date":"2014-08-27T22:59:21","date_gmt":"2014-08-27T14:59:21","guid":{"rendered":"http:\/\/www.ipcpu.com\/?p=566"},"modified":"2014-08-27T22:59:21","modified_gmt":"2014-08-27T14:59:21","slug":"iptables-case-error","status":"publish","type":"post","link":"https:\/\/c.ipcpu.com\/2014\/08\/iptables-case-error\/","title":{"rendered":"iptables\u9632\u706b\u5899\u6545\u969c\u6392\u9664\u4e00\u4f8b"},"content":{"rendered":"

iptables\u9632\u706b\u5899\u6545\u969c\u6392\u9664\u4e00\u4f8b.md<\/p>\n

ipcpu,2014-08-26<\/p>\n

\u524d\u51e0\u5929\u78b0\u5230\u8fd9\u4e48\u4e00\u4e2a\u6545\u969c\u3002<\/p>\n

\u6545\u969c\u73b0\u8c61<\/h2>\n

\u670d\u52a1\u5668A<\/p>\n

\n

\u79c1\u7f51IP 10.249.129.181
\n \u79c1\u7f51\u7f51\u5173 10.249.129.254
\n \u79c1\u7f51\u8def\u7531\u6bb5\uff1a10.0.0.0\/8
\n \u516c\u7f51IP 202.106.2.8 <\/p>\n<\/blockquote>\n

\u56e0\u4e3a\u8fd9\u4e2a\u670d\u52a1\u5668\u6709\u516c\u7f51IP\u5730\u5740\uff0c\u6240\u4ee5\u88ab\u7528\u6765\u5f53\u505a\u540c\u7f51\u6bb5\u5176\u4ed6\u670d\u52a1\u5668\u7684\u7f51\u5173\uff0c\u501f\u52a9\u6b64\u673a\u5668\u4e0a\u7f51\u3002<\/p>\n

iptables\u4e2d\u7684\u89c4\u5219\u662f\u8fd9\u6837\u7684<\/p>\n

  1. -<\/span>A POSTROUTING <\/span>-<\/span>s <\/span>10.0<\/span>.<\/span>0.0<\/span>\/<\/span>8<\/span> <\/span>-<\/span>j SNAT <\/span>--<\/span>to <\/span>202.106<\/span>.<\/span>2.8<\/span><\/code><\/li><\/ol><\/pre>\n
    \u5728\u5b9e\u9645\u4f7f\u7528\u4e2d\u53d1\u73b0\uff0c\u5176\u4ed6\u673a\u5668\u901a\u8fc7\u672c\u673aNAT\u4e0a\u7f51\u65f6\u6ca1\u95ee\u9898\u7684\uff0c\u4f46\u662f\u672c\u673aping \u4e0d\u901a\u81ea\u5df1\u7684\u5185\u7f51\u7f51\u5173\uff01<\/p>\n
    \u7ecf\u8fc7\u5b9e\u9a8c\u53d1\u73b0\u6b64\u670d\u52a1\u5668\u6709\u5982\u4e0b\u7279\u6027\uff1a<\/p>\n
    \n
      \n
    1. \u540c\u7f51\u6bb5\u548c\u5c40\u57df\u7f51\u5185\u5176\u4ed6\u7f51\u6bb5\u7684\u673a\u5668\u8bbf\u95ee\u672c\u673a\u7684\u670d\u52a1\uff08HTTP\uff09\u662fok\u7684\u3002<\/li>\n
    2. \u672c\u673a\u4e3b\u52a8\u53d1\u8d77\u6570\u636e\u5305\u5230\u5185\u7f51\u7f51\u5173\u548c\u5176\u4ed6\u5185\u7f51\u673a\u5668\u4e0d\u901a\u3002<\/li>\n<\/ol>\n<\/blockquote>\n
      \u6545\u969c\u5b9a\u4f4d<\/h2>\n
      \u7ecf\u8fc7\u5206\u6790\u6574\u4e2aiptables\u6570\u636e\u6d41\u7a0b\u56fe\uff08\u5907\u6ce81\uff09\u53d1\u73b0\uff0c\u672c\u5730\u53d1\u8d77\u7684\u6570\u636e\u5305\uff0c\u9700\u8981\u7ecf\u8fc7<\/p>\n
      1. nat<\/span>-<\/span>OUTPUT<\/span>--->><\/span> filter<\/span>-<\/span>OUTPUT<\/span>--->><\/span>nat<\/span>-<\/span>POSTROUTING<\/span>\uff08\u5907\u6ce8<\/span>2<\/span>\uff09<\/span><\/code><\/li><\/ol><\/pre>\n
        \u56e0\u6b64\u65ad\u5b9a\uff0cPOSTROUTING \u4e2d\u5c06\u672c\u5730\u53d1\u8d77\u7684\u6570\u636e\u5305SNAT\u5bfc\u81f4\u5185\u7f51\u7f51\u5173\u4e0d\u8bc6\u522b\u8be5\u6570\u636e\u5305\uff0c\u65e0\u6cd5\u901a\u4fe1\u3002<\/p>\n
        \u5c06\u9632\u706b\u5899\u7684NAT\u8868\u7684\u6574\u4e2a\u7f51\u6bb5\u6362\u6210\u5355\u4e2a\u7684IP\u5730\u5740\u5c31\u597d\u4e86\u3002<\/p>\n
        \u8fdb\u9636\u5206\u6790<\/h2>\n
        \u4e8b\u60c5\u8c8c\u4f3c\u662f\u7ed3\u675f\u4e86\uff0c\u4f46\u5176\u5b9e\u5e76\u6ca1\u6709\uff0c\u624d\u521a\u521a\u5f00\u59cb\u3002<\/p>\n
        \u5982\u679c\u6240\u6709\u7684\u6570\u636e\u5305\u90fd\u8981\u7ecf\u8fc7nat-OUTPUT,filter-OUTPUT,nat-POSTROUTING \u8fd9\u6837\u4e00\u4e2a\u8fc7\u7a0b\uff0c\u90a3\u4e48\u8fd9\u4e2a\u673a\u5668\u4e0a\u7684\u670d\u52a1\u5176\u5b9e\u4e0d\u80fd\u5bf9\u5185\u7f51\u6b63\u5e38\u63d0\u4f9b\u670d\u52a1\u7684\u3002\u8fd9\u4e2a\u95ee\u9898\u624d\u662f\u503c\u5f97\u601d\u8003\u7684\u3002<\/p>\n
        \u901a\u8fc7iptables\u7684LOG\u6765\u8bb0\u5f55\u65e5\u5fd7\uff08\u540c\u5907\u6ce82\uff09\uff0c\u6211\u53d1\u73b0\uff0c\u672c\u5730\u53d1\u8d77\u7684\u5305\u662f\u6309\u7167nat-OUTPUT,filter-OUTPUT,nat-POSTROUTING \u987a\u5e8f\u7684\u3002\u4f46\u662f\u522b\u4eba\u8bbf\u95ee\u8be5\u670d\u52a1\u5668\u7684\u670d\u52a1\uff08\u4f8b\u5982apache\uff09\uff0c\u8be5\u670d\u52a1\u5668\u8fd4\u56de\u7684\u6570\u636e\u5305\u987a\u5e8f\u53ea\u6709 filter-OUTPUT  \u3002\uff08\u5907\u6ce83\uff09<\/p>\n
        \u7ecf\u8fc7\u67e5\u627e\u76f8\u5173\u8d44\u6599\uff0c\u5f97\u5230\u4e00\u4e2a\u7ed3\u8bba\uff1a<\/p>\n
        1. \u6bcf\u4e2a\u8fde\u63a5\u53ea\u6709\u7b2c\u4e00\u4e2a\u6570\u636e\u5305\u624d\u4f1a\u7ecf\u8fc7<\/span>NAT<\/span>\u8fd9\u4e2a\u8868\u3002<\/span><\/code><\/li>
        2. Be<\/span> aware that the nat table <\/span>is<\/span> traversed only <\/span>by<\/span> the first packet of each connection<\/span>.<\/span> <\/span><\/code><\/li><\/ol><\/pre>\n
          \u56e0\u6b64\u6b64\u5904\u53ef\u4ee5\u89e3\u91ca\u7684\u901a\u4e86\uff0c\u7b2c\u4e00\u4e2a\u8fde\u63a5\u5bf9TCP\u6765\u8bf4\u5c31\u662fSYN\u5305\uff0c\u56e0\u6b64\u672c\u5730\u53d1\u8d77\u7684SYN\u4f1a\u7ecf\u8fc7nat-OUTPUT\uff0cnat-POSTROUTING\u8868\uff0c\u4e8e\u662f\u88abSNAT\u8bef\u64cd\u4f5c\u3002\u800c\u5bf9\u4e8e\u522b\u4eba\u8bbf\u95ee\u8be5\u670d\u52a1\u5668\uff0c\u8be5\u670d\u52a1\u5668\u8fd4\u56de\u6570\u636e\uff0c\u6b64\u65f6\u8fd4\u56de\u7684\u5e94\u8be5\u662fACK,SYN\u5305\uff0c\u56e0\u6b64\u6b64\u5305\u4e0d\u7ecf\u8fc7nat\u8868\uff0c\u662f\u53ef\u4ee5\u5230\u8fbe\u76ee\u7684\u5730\u7684\u3002<\/p>\n
          \u5bf9\u4e8enat\u8868\u7684\u8fd9\u4e2a\u7279\u6027\uff0c\u6211\u4eec\u4e5f\u53ef\u4ee5\u4eceNAT\u670d\u52a1\u5668\u4e0a\u5f97\u5230\u4e00\u4e9b\u86db\u4e1d\u9a6c\u8ff9\uff1a<\/p>\n
          \u5c06iptables\u8ba1\u6570\u5668\u5168\u90e8\u6e05\u96f6\u4ee5\u540e\uff0c\u6211\u4eec\u5f97\u5230\u4e86\u5982\u4e0b\u6570\u636e\uff1a<\/p>\n
          1. Chain<\/span> FORWARD <\/span>(<\/span>policy ACCEPT <\/span>23948<\/span> packets<\/span>,<\/span> <\/span>1388K<\/span> bytes<\/span>)<\/span><\/code><\/li>
          2.  pkts bytes target     prot opt <\/span>in<\/span>     <\/span>out<\/span>     source               destination         <\/span><\/code><\/li>
          3.   <\/span>489<\/span> <\/span>22192<\/span> ACCEPT     all  <\/span>--<\/span>  <\/span>*<\/span>      <\/span>*<\/span>       <\/span>10.249<\/span>.<\/span>129<\/span> <\/span>181<\/span>       <\/span>0.0<\/span>.<\/span>0.0<\/span>\/<\/span>0<\/span>  <\/span><\/code><\/li>
          4. <\/code><\/li>
          5. Chain<\/span> POSTROUTING <\/span>(<\/span>policy ACCEPT <\/span>59116<\/span> packets<\/span>,<\/span> <\/span>3331K<\/span> bytes<\/span>)<\/span><\/code><\/li>
          6.  pkts bytes target     prot opt <\/span>in<\/span>     <\/span>out<\/span>     source               destination                  <\/span><\/code><\/li>
          7.    <\/span>14<\/span>   <\/span>840<\/span> MASQUERADE  all  <\/span>--<\/span>  <\/span>*<\/span>      <\/span>*<\/span>       <\/span>10.249<\/span>.<\/span>129.181<\/span>       <\/span>0.0<\/span>.<\/span>0.0<\/span>\/<\/span>0<\/span> <\/span><\/code><\/li><\/ol><\/pre>\n
            \u4ece\u4ee5\u4e0a\u6570\u636e\u53ef\u4ee5\u770b\u51fa\uff0cnat\u8868\u8bb0\u5f55\u7684\u5305\u6570\u91cf\u7684\u786e\u5c11\u4e86\u5f88\u591a\u3002<\/p>\n
            \u65e2\u7136\u53ea\u6709\u7b2c\u4e00\u4e2a\u5305\u7ecf\u8fc7nat\u8868\uff0c\u90a3\u540e\u7eed\u7684\u5305\u600e\u4e48\u529e\uff1f 
            \n\u540e\u7eed\u7684\u5c5e\u4e8e\u8be5\u8fde\u63a5\u7684\u6240\u6709\u6570\u636e\u5305\u5c06\u6309\u7167\u7b2c\u4e00\u4e2a\u6570\u636e\u5305\u7684\u5904\u7406\u52a8\u4f5c\u505a\u540c\u6837\u7684\u64cd\u4f5c\uff0c\u8fd9\u79cd\u7279\u6027\u662f\u7531\u8fde\u63a5\u8ddf\u8e2a\u673a\u5236\u6765\u5b9e\u73b0\u7684\u3002<\/p>\n
            \u6709\u5174\u8da3\u7684\u540c\u5b66\u53ef\u4ee5\u770b\u4e0b\u8fd9\u4e24\u7bc7\u6587\u7ae0\uff08\u96be\u5ea6\u8f83\u5927\uff0c\u6e90\u7801\u7ea7\u522b\uff09\uff1a 
            \nhttp:\/\/blog.chinaunix.net\/uid-23069658-id-3169450.html<\/a> 
            \n            http:\/\/blog.chinaunix.net\/uid-10167808-id-26001.html<\/a><\/p>\n
            OK\u3002\u5c31\u5230\u8fd9\u91cc\u4e86\u3002<\/p>\n
            \u5907\u6ce81<\/h2>\n
            NAT\u6570\u636e\u6d41\u56fe\uff1a 
            \n<\/p>\n
            \u5907\u6ce82<\/h2>\n
            \u5982\u4f55\u9a8c\u8bc1\u8be5\u6d41\u7a0b\uff1f 
            \n\u8fd9\u91cc\u6211\u4f7f\u7528\u4e86iptables\u7684LOG\u52a8\u4f5c\u6765\u8bb0\u5f55\u6570\u636e\u5305\uff0c\u5728iptables\u4e2d\u6dfb\u52a0\u5982\u4e0b\u6761\u76ee<\/p>\n
            1. iptables <\/span>-<\/span>A OUTPUT <\/span>-<\/span>d <\/span>10.249<\/span>.<\/span>64.2<\/span>\/<\/span>32<\/span> <\/span>-<\/span>j LOG <\/span>--<\/span>log<\/span>-<\/span>prefix <\/span>\"fl-OUTPUT\"<\/span><\/code><\/li>
            2. iptables <\/span>-<\/span>t nat <\/span>-<\/span>A POSTROUTING <\/span>-<\/span>d <\/span>10.249<\/span>.<\/span>64.2<\/span>\/<\/span>32<\/span> <\/span>-<\/span>j LOG <\/span>--<\/span>log<\/span>-<\/span>prefix <\/span>\"nat-POSTROUTING\"<\/span><\/code><\/li>
            3. iptables <\/span>-<\/span>t nat <\/span>-<\/span>A OUTPUT <\/span>-<\/span>d <\/span>10.249<\/span>.<\/span>64.2<\/span>\/<\/span>32<\/span> <\/span>-<\/span>j LOG <\/span>--<\/span>log<\/span>-<\/span>prefix <\/span>\"nat-OUTPUT\"<\/span><\/code><\/li><\/ol><\/pre>\n
              1.  nat<\/span>-<\/span>OUTPUTIN<\/span>=<\/span> OUT<\/span>=<\/span>eth0 SRC<\/span>=<\/span>10.249<\/span>.<\/span>129.181<\/span> DST<\/span>=<\/span>10.249<\/span>.<\/span>64.2<\/span> LEN<\/span>=<\/span>60<\/span> TOS<\/span>=<\/span>0x00<\/span> PREC<\/span>=<\/span>0x00<\/span> TTL<\/span>=<\/span>64<\/span> ID<\/span>=<\/span>6247<\/span> DF PROTO<\/span>=<\/span>TCP SPT<\/span>=<\/span>55339<\/span> DPT<\/span>=<\/span>80<\/span> WINDOW<\/span>=<\/span>14600<\/span> RES<\/span>=<\/span>0x00<\/span> SYN URGP<\/span>=<\/span>0<\/span> <\/span><\/code><\/li>
              2.  fl<\/span>-<\/span>OUTPUTIN<\/span>=<\/span> OUT<\/span>=<\/span>eth0 SRC<\/span>=<\/span>10.249<\/span>.<\/span>129.181<\/span> DST<\/span>=<\/span>10.249<\/span>.<\/span>64.2<\/span> LEN<\/span>=<\/span>60<\/span> TOS<\/span>=<\/span>0x00<\/span> PREC<\/span>=<\/span>0x00<\/span> TTL<\/span>=<\/span>64<\/span> ID<\/span>=<\/span>6247<\/span> DF PROTO<\/span>=<\/span>TCP SPT<\/span>=<\/span>55339<\/span> DPT<\/span>=<\/span>80<\/span> WINDOW<\/span>=<\/span>14600<\/span> RES<\/span>=<\/span>0x00<\/span> SYN URGP<\/span>=<\/span>0<\/span> <\/span><\/code><\/li>
              3.  nat<\/span>-<\/span>POSTROUTINGIN<\/span>=<\/span> OUT<\/span>=<\/span>eth0 SRC<\/span>=<\/span>10.249<\/span>.<\/span>129.181<\/span> DST<\/span>=<\/span>10.249<\/span>.<\/span>64.2<\/span> LEN<\/span>=<\/span>60<\/span> TOS<\/span>=<\/span>0x00<\/span> PREC<\/span>=<\/span>0x00<\/span> TTL<\/span>=<\/span>64<\/span> ID<\/span>=<\/span>6247<\/span> DF PROTO<\/span>=<\/span>TCP SPT<\/span>=<\/span>55339<\/span> DPT<\/span>=<\/span>80<\/span> WINDOW<\/span>=<\/span>14600<\/span> RES<\/span>=<\/span>0x00<\/span> SYN URGP<\/span>=<\/span>0<\/span><\/code><\/li><\/ol><\/pre>\n
                \u5907\u6ce83<\/h2>\n
                \u4fdd\u6301iptables\u89c4\u5219\u4e0d\u53d8\u3002 
                \n\u5f53\u6211\u4eec\u53cd\u8fc7\u6765\u572810.249.64.2\u4e0a\u6267\u884ccurl                 http:\/\/10.249.129.181<\/a>   \u5f97\u5230\u7684\u65e5\u5fd7\u5982\u4e0b\uff1a<\/p>\n
                1.  fl<\/span>-<\/span>OUTPUTIN<\/span>=<\/span> OUT<\/span>=<\/span>eth0 SRC<\/span>=<\/span>10.249<\/span>.<\/span>129.181<\/span> DST<\/span>=<\/span>10.249<\/span>.<\/span>64.2<\/span> LEN<\/span>=<\/span>52<\/span> TOS<\/span>=<\/span>0x00<\/span> PREC<\/span>=<\/span>0x00<\/span> TTL<\/span>=<\/span>64<\/span> ID<\/span>=<\/span>0<\/span> DF PROTO<\/span>=<\/span>TCP SPT<\/span>=<\/span>80<\/span> DPT<\/span>=<\/span>44952<\/span> WINDOW<\/span>=<\/span>14600<\/span> RES<\/span>=<\/span>0x00<\/span> ACK SYN URGP<\/span>=<\/span>0<\/span> <\/span><\/code><\/li>
                2.  fl<\/span>-<\/span>OUTPUTIN<\/span>=<\/span> OUT<\/span>=<\/span>eth0 SRC<\/span>=<\/span>10.249<\/span>.<\/span>129.181<\/span> DST<\/span>=<\/span>10.249<\/span>.<\/span>64.2<\/span> LEN<\/span>=<\/span>40<\/span> TOS<\/span>=<\/span>0x00<\/span> PREC<\/span>=<\/span>0x00<\/span> TTL<\/span>=<\/span>64<\/span> ID<\/span>=<\/span>28371<\/span> DF PROTO<\/span>=<\/span>TCP SPT<\/span>=<\/span>80<\/span> DPT<\/span>=<\/span>44952<\/span> WINDOW<\/span>=<\/span>123<\/span> RES<\/span>=<\/span>0x00<\/span> ACK URGP<\/span>=<\/span>0<\/span> <\/span><\/code><\/li>
                3.  fl<\/span>-<\/span>OUTPUTIN<\/span>=<\/span> OUT<\/span>=<\/span>eth0 SRC<\/span>=<\/span>10.249<\/span>.<\/span>129.181<\/span> DST<\/span>=<\/span>10.249<\/span>.<\/span>64.2<\/span> LEN<\/span>=<\/span>562<\/span> TOS<\/span>=<\/span>0x00<\/span> PREC<\/span>=<\/span>0x00<\/span> TTL<\/span>=<\/span>64<\/span> ID<\/span>=<\/span>28372<\/span> DF PROTO<\/span>=<\/span>TCP SPT<\/span>=<\/span>80<\/span> DPT<\/span>=<\/span>44952<\/span> WINDOW<\/span>=<\/span>123<\/span> RES<\/span>=<\/span>0x00<\/span> ACK PSH URGP<\/span>=<\/span>0<\/span> <\/span><\/code><\/li><\/ol><\/pre>\n
                  \u53c2\u8003\u8d44\u6599\uff1a<\/h2>\n
                  http:\/\/www.microhowto.info\/troubleshooting\/troubleshooting_iptables.html<\/a> 
                  \n                  http:\/\/blog.chinaunix.net\/uid-23069658-id-3163999.html<\/a> 
                  \n                  http:\/\/ebtables.sourceforge.net\/br_fw_ia\/br_fw_ia.html<\/a><\/p>\n
                  \u8f6c\u8f7d\u8bf7\u6ce8\u660e\uff1aIPCPU-\u7f51\u7edc\u4e4b\u8def<\/a> » iptables\u9632\u706b\u5899\u6545\u969c\u6392\u9664\u4e00\u4f8b<\/a><\/p>","protected":false},"excerpt":{"rendered":"
                  iptables\u9632\u706b\u5899\u6545\u969c\u6392\u9664\u4e00\u4f8b.md ipcpu,2014-08-26 \u524d\u51e0\u5929\u78b0\u5230\u8fd9\u4e48\u4e00\u4e2a\u6545\u969c\u3002 \u6545\u969c\u73b0\u8c61 \u670d\u52a1\u5668A \u79c1\u7f51IP 10.249.129.181 \u79c1\u7f51\u7f51\u5173 10.249.129.254 \u79c1\u7f51\u8def\u7531\u6bb5\uff1a10.0.0.0\/8 \u516c\u7f51IP 202.106.2.8 \u56e0\u4e3a\u8fd9\u4e2a\u670d\u52a1\u5668\u6709\u516c\u7f51IP\u5730\u5740\uff0c\u6240\u4ee5\u88ab\u7528\u6765\u5f53\u505a\u540c\u7f51\u6bb5\u5176\u4ed6\u670d\u52a1\u5668\u7684\u7f51\u5173\uff0c\u501f\u52a9\u6b64\u673a\u5668\u4e0a\u7f51\u3002 iptables\u4e2d\u7684\u89c4\u5219\u662f\u8fd9\u6837\u7684 -A POSTROUTING -s 10.0.0.0\/8 -j SNAT –to 202.106.2.8 \u5728\u5b9e\u9645\u4f7f\u7528\u4e2d\u53d1\u73b0\uff0c\u5176\u4ed6\u673a\u5668\u901a\u8fc7\u672c\u673aNAT\u4e0a\u7f51\u65f6\u6ca1\u95ee\u9898\u7684\uff0c\u4f46\u662f\u672c\u673aping \u4e0d\u901a\u81ea\u5df1\u7684\u5185\u7f51\u7f51\u5173\uff01 \u7ecf\u8fc7\u5b9e\u9a8c\u53d1\u73b0\u6b64\u670d\u52a1\u5668\u6709\u5982\u4e0b\u7279\u6027\uff1a \u540c\u7f51\u6bb5\u548c\u5c40\u57df\u7f51\u5185\u5176\u4ed6\u7f51\u6bb5\u7684\u673a\u5668\u8bbf\u95ee\u672c\u673a\u7684\u670d\u52a1\uff08HTTP\uff09\u662fok\u7684\u3002 \u672c\u673a\u4e3b\u52a8\u53d1\u8d77\u6570\u636e\u5305\u5230\u5185\u7f51\u7f51\u5173\u548c\u5176\u4ed6\u5185\u7f51\u673a\u5668\u4e0d\u901a\u3002 \u6545\u969c\u5b9a\u4f4d \u7ecf\u8fc7\u5206\u6790\u6574\u4e2aiptables\u6570\u636e\u6d41\u7a0b\u56fe\uff08\u5907\u6ce81\uff09\u53d1\u73b0\uff0c\u672c\u5730\u53d1\u8d77\u7684\u6570\u636e\u5305\uff0c\u9700\u8981\u7ecf\u8fc7 nat-OUTPUT—>> filter-OUTPUT—>>nat-POSTROUTING\uff08\u5907\u6ce82\uff09 \u56e0\u6b64\u65ad\u5b9a\uff0cPOSTROUTING \u4e2d\u5c06\u672c\u5730\u53d1\u8d77\u7684\u6570\u636e\u5305SNAT\u5bfc\u81f4\u5185\u7f51\u7f51\u5173\u4e0d\u8bc6\u522b\u8be5\u6570\u636e\u5305\uff0c\u65e0\u6cd5\u901a\u4fe1\u3002 \u5c06\u9632\u706b\u5899\u7684NAT\u8868\u7684\u6574\u4e2a\u7f51\u6bb5\u6362\u6210\u5355\u4e2a\u7684IP\u5730\u5740\u5c31\u597d\u4e86\u3002 \u8fdb\u9636\u5206\u6790 \u4e8b\u60c5\u8c8c\u4f3c\u662f\u7ed3\u675f\u4e86\uff0c\u4f46\u5176\u5b9e\u5e76\u6ca1\u6709\uff0c\u624d\u521a\u521a\u5f00\u59cb\u3002 \u5982\u679c\u6240\u6709\u7684\u6570\u636e\u5305\u90fd\u8981\u7ecf\u8fc7nat-OUTPUT,filter-OUTPUT,nat-POSTROUTING \u8fd9\u6837\u4e00\u4e2a\u8fc7\u7a0b\uff0c\u90a3\u4e48\u8fd9\u4e2a\u673a\u5668\u4e0a\u7684\u670d\u52a1\u5176\u5b9e\u4e0d\u80fd\u5bf9\u5185\u7f51\u6b63\u5e38\u63d0\u4f9b\u670d\u52a1\u7684\u3002\u8fd9\u4e2a\u95ee\u9898\u624d\u662f\u503c\u5f97\u601d\u8003\u7684\u3002 \u901a\u8fc7iptables\u7684LOG\u6765\u8bb0\u5f55\u65e5\u5fd7\uff08\u540c\u5907\u6ce82\uff09\uff0c\u6211\u53d1\u73b0\uff0c\u672c\u5730\u53d1\u8d77\u7684\u5305\u662f\u6309\u7167nat-OUTPUT,filter-OUTPUT,nat-POSTROUTING \u987a\u5e8f\u7684\u3002\u4f46\u662f\u522b\u4eba\u8bbf\u95ee\u8be5\u670d\u52a1\u5668\u7684\u670d\u52a1\uff08\u4f8b\u5982apache\uff09\uff0c\u8be5\u670d\u52a1\u5668\u8fd4\u56de\u7684\u6570\u636e\u5305\u987a\u5e8f\u53ea\u6709 filter-OUTPUT \u3002\uff08\u5907\u6ce83\uff09 \u7ecf\u8fc7\u67e5\u627e\u76f8\u5173\u8d44\u6599\uff0c\u5f97\u5230\u4e00\u4e2a\u7ed3\u8bba\uff1a \u6bcf\u4e2a\u8fde\u63a5\u53ea\u6709\u7b2c\u4e00\u4e2a\u6570\u636e\u5305\u624d\u4f1a\u7ecf\u8fc7NAT\u8fd9\u4e2a\u8868\u3002Be aware that the nat table is traversed only by the first […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[13],"tags":[54,17,15,71],"_links":{"self":[{"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/posts\/566"}],"collection":[{"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/comments?post=566"}],"version-history":[{"count":0,"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/posts\/566\/revisions"}],"wp:attachment":[{"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/media?parent=566"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/categories?post=566"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/c.ipcpu.com\/wp-json\/wp\/v2\/tags?post=566"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
              \u7136\u540e\u4f7f\u7528curl http:\/\/10.249.64.2<\/a>   \u4ea7\u751f\u6570\u636e\u5305\uff0c\u67e5\u770bmessage\u65e5\u5fd7\uff0c\u5f97\u5230<\/p>\n