{"id":15605,"date":"2008-12-18T23:32:55","date_gmt":"2008-12-18T15:32:55","guid":{"rendered":"https:\/\/www.fuhaijun.com\/?p=15605"},"modified":"2008-12-18T23:32:55","modified_gmt":"2008-12-18T15:32:55","slug":"arp%e5%8d%8f%e8%ae%ae%e6%8f%ad%e5%af%86","status":"publish","type":"post","link":"http:\/\/www.fuhaijun.com\/?p=15605","title":{"rendered":"ARP\u534f\u8bae\u63ed\u5bc6"},"content":{"rendered":"
\n

1 ARP\u534f\u8bae\u6982\u8ff0<\/p>\n

<\/p>\n

IP\u6570\u636e\u5305\u5e38\u901a\u8fc7\u4ee5\u592a\u7f51\u53d1\u9001\u3002\u4ee5\u592a\u7f51\u8bbe\u5907\u5e76\u4e0d\u8bc6\u522b32\u4f4dIP\u5730\u5740\uff1a\u5b83\u4eec\u662f\u4ee548\u4f4d\u4ee5\u592a\u7f51\u5730\u5740\u4f20\u8f93\u4ee5\u592a\u7f51\u6570\u636e\u5305\u7684\u3002\u56e0\u6b64\uff0cIP\u9a71\u52a8\u5668\u5fc5\u987b\u628aIP\u76ee\u7684\u5730\u5740\u8f6c\u6362\u6210\u4ee5\u592a\u7f51\u7f51\u76ee\u7684\u5730\u5740\u3002\u5728\u8fd9\u4e24\u79cd\u5730\u5740\u4e4b\u95f4\u5b58\u5728\u7740\u67d0\u79cd\u9759\u6001\u7684\u6216\u7b97\u6cd5\u7684\u6620\u5c04\uff0c\u5e38\u5e38\u9700\u8981\u67e5\u770b\u4e00\u5f20\u8868\u3002\u5730\u5740\u89e3\u6790\u534f\u8bae(Address Resolution Protocol\uff0cARP)\u5c31\u662f\u7528\u6765\u786e\u5b9a\u8fd9\u4e9b\u6620\u8c61\u7684\u534f\u8bae\u3002<\/p>\n

<\/p>\n

ARP\u5de5\u4f5c\u65f6\uff0c\u9001\u51fa\u4e00\u4e2a\u542b\u6709\u6240\u5e0c\u671b\u7684IP\u5730\u5740\u7684\u4ee5\u592a\u7f51\u5e7f\u64ad\u6570\u636e\u5305\u3002\u76ee\u7684\u5730\u4e3b\u673a\uff0c\u6216\u53e6\u4e00\u4e2a\u4ee3\u8868\u8be5\u4e3b\u673a\u7684\u7cfb\u7edf\uff0c\u4ee5\u4e00\u4e2a\u542b\u6709IP\u548c\u4ee5\u592a\u7f51\u5730\u5740\u5bf9\u7684\u6570\u636e\u5305\u4f5c\u4e3a\u5e94\u7b54\u3002\u53d1\u9001\u8005\u5c06\u8fd9\u4e2a\u5730\u5740\u5bf9\u9ad8\u901f\u7f13\u5b58\u8d77\u6765\uff0c\u4ee5\u8282\u7ea6\u4e0d\u5fc5\u8981\u7684ARP\u901a\u4fe1\u3002<\/p>\n

<\/p>\n

\u5982\u679c\u6709\u4e00\u4e2a\u4e0d\u88ab\u4fe1\u4efb\u7684\u8282\u70b9\u5bf9\u672c\u5730\u7f51\u7edc\u5177\u6709\u5199\u8bbf\u95ee\u8bb8\u53ef\u6743\uff0c\u90a3\u4e48\u4e5f\u4f1a\u6709\u67d0\u79cd\u98ce\u9669\u3002\u8fd9\u6837\u4e00\u53f0\u673a\u5668\u53ef\u4ee5\u53d1\u5e03\u865a\u5047\u7684ARP\u62a5\u6587\u5e76\u5c06\u6240\u6709\u901a\u4fe1\u90fd\u8f6c\u5411\u5b83\u81ea\u5df1\uff0c\u7136\u540e\u5b83\u5c31\u53ef\u4ee5\u626e\u6f14\u67d0\u4e9b\u673a\u5668\uff0c\u6216\u8005\u987a\u4fbf\u5bf9\u6570\u636e\u6d41\u8fdb\u884c\u7b80\u5355\u7684\u4fee\u6539\u3002ARP\u673a\u5236\u5e38\u5e38\u662f\u81ea\u52a8\u8d77\u4f5c\u7528\u7684\u3002\u5728\u7279\u522b\u5b89\u5168\u7684\u7f51\u7edc\u4e0a\uff0c ARP\u6620\u5c04\u53ef\u4ee5\u7528\u56fa\u4ef6\uff0c\u5e76\u4e14\u5177\u6709\u81ea\u52a8\u6291\u5236\u534f\u8bae\u8fbe\u5230\u9632\u6b62\u5e72\u6270\u7684\u76ee\u7684\u3002<\/p>\n

<\/p>\n

<\/p>\n

\u56fe1 \u4ee5\u592a\u7f51\u4e0a\u7684ARP\u62a5\u6587\u683c\u5f0f <\/p>\n

<\/p>\n

\u56fe1\u662f\u4e00\u4e2a\u7528\u4f5cIP\u5230\u4ee5\u592a\u7f51\u5730\u5740\u8f6c\u6362\u7684ARP\u62a5\u6587\u7684\u4f8b\u5b50\u3002\u5728\u56fe\u4e2d\u6bcf\u4e00\u884c\u4e3a32\u4f4d\uff0c\u4e5f\u5c31\u662f4\u4e2a\u516b\u4f4d\u7ec4\u8868\u793a\uff0c\u5728\u4ee5\u540e\u7684\u56fe\u4e2d\uff0c\u6211\u4eec\u4e5f\u5c06\u9075\u5faa\u8fd9\u4e00\u65b9\u5f0f\u3002<\/p>\n

<\/p>\n

\u786c\u4ef6\u7c7b\u578b\u5b57\u6bb5\u6307\u660e\u4e86\u53d1\u9001\u65b9\u60f3\u77e5\u9053\u7684\u786c\u4ef6\u63a5\u53e3\u7c7b\u578b\uff0c\u4ee5\u592a\u7f51\u7684\u503c\u4e3a1\u3002\u534f\u8bae\u7c7b\u578b\u5b57\u6bb5\u6307\u660e\u4e86\u53d1\u9001\u65b9\u63d0\u4f9b\u7684\u9ad8\u5c42\u534f\u8bae\u7c7b\u578b\uff0cIP\u4e3a0806\uff0816\u8fdb\u5236\uff09\u3002\u786c\u4ef6\u5730\u5740\u957f\u5ea6\u548c\u534f\u8bae\u957f\u5ea6\u6307\u660e\u4e86\u786c\u4ef6\u5730\u5740\u548c\u9ad8\u5c42\u534f\u8bae\u5730\u5740\u7684\u957f\u5ea6\uff0c\u8fd9\u6837ARP\u62a5\u6587\u5c31\u53ef\u4ee5\u5728\u4efb\u610f\u786c\u4ef6\u548c\u4efb\u610f\u534f\u8bae\u7684\u7f51\u7edc\u4e2d\u4f7f\u7528\u3002\u64cd\u4f5c\u5b57\u6bb5\u7528\u6765\u8868\u793a\u8fd9\u4e2a\u62a5\u6587\u7684\u76ee\u7684\uff0cARP\u8bf7\u6c42\u4e3a1\uff0cARP\u54cd\u5e94\u4e3a2\uff0cRARP\u8bf7\u6c42\u4e3a3\uff0cRARP\u54cd\u5e94\u4e3a4\u3002<\/p>\n

<\/p>\n

\u5f53\u53d1\u51faARP\u8bf7\u6c42\u65f6\uff0c\u53d1\u9001\u65b9\u586b\u597d\u53d1\u9001\u65b9\u9996\u90e8\u548c\u53d1\u9001\u65b9IP\u5730\u5740\uff0c\u8fd8\u8981\u586b\u5199\u76ee\u6807IP\u5730\u5740\u3002\u5f53\u76ee\u6807\u673a\u5668\u6536\u5230\u8fd9\u4e2aARP\u5e7f\u64ad\u5305\u65f6\uff0c\u5c31\u4f1a\u5728\u54cd\u5e94\u62a5\u6587\u4e2d\u586b\u4e0a\u81ea\u5df1\u768448\u4f4d\u4e3b\u673a\u5730\u5740\u3002<\/p>\n

<\/p>\n

2 ARP\u4f7f\u7528\u4e3e\u4f8b<\/p>\n

<\/p>\n

\u6211\u4eec\u5148\u770b\u4e00\u4e0blinux\u4e0b\u7684arp\u547d\u4ee4(\u5982\u679c\u5f00\u59cbarp\u8868\u4e2d\u7684\u5185\u5bb9\u4e3a\u7a7a\u7684\u8bdd,\u9700\u8981\u5148\u5bf9\u67d0\u53f0\u4e3b\u673a\u8fdb\u884c\u4e00\u4e2a\u8fde\u63a5,\u4f8b\u5982ping\u4e00\u4e0b\u76ee\u6807\u4e3b\u673a\u6765\u4ea7\u751f\u4e00\u4e2aarp\u9879)\uff1a<\/p>\n

<\/p>\n

d2server:\/home\/kerberos# arp<\/p>\n

Address HWtype HWaddress Flags Mask Iface<\/p>\n

211.161.17.254 ether 00:04:9A:AD:1C:0A C eth0<\/p>\n

Address\uff1a\u4e3b\u673a\u7684IP\u5730\u5740<\/p>\n

Hwtype\uff1a\u4e3b\u673a\u7684\u786c\u4ef6\u7c7b\u578b<\/p>\n

Hwaddress\uff1a\u4e3b\u673a\u7684\u786c\u4ef6\u5730\u5740<\/p>\n

Flags Mask\uff1a\u8bb0\u5f55\u6807\u5fd7\uff0c”C”\u8868\u793aarp\u9ad8\u901f\u7f13\u5b58\u4e2d\u7684\u6761\u76ee\uff0c”M”\u8868\u793a\u9759\u6001\u7684arp\u6761\u76ee\u3002<\/p>\n

<\/p>\n

\u7528”arp –a”\u547d\u4ee4\u53ef\u4ee5\u663e\u793a\u4e3b\u673a\u5730\u5740\u4e0eIP\u5730\u5740\u7684\u5bf9\u5e94\u8868\uff0c\u4e5f\u5c31\u662f\u673a\u5668\u4e2d\u6240\u4fdd\u5b58\u7684arp\u7f13\u5b58\u4fe1\u606f\u3002\u8fd9\u4e2a\u9ad8\u901f\u7f13\u5b58\u5b58\u653e\u4e86\u6700\u8fd1Internet\u5730\u5740\u5230\u786c\u4ef6\u5730\u5740\u4e4b\u95f4\u7684\u6620\u5c04\u8bb0\u5f55\u3002\u9ad8\u901f\u7f13\u5b58\u4e2d\u6bcf\u4e00\u9879\u7684\u751f\u5b58\u65f6\u95f4\u4e00\u822c\u4e3a20\u5206\u949f\uff0c\u8d77\u59cb\u65f6\u95f4\u4ece\u88ab\u521b\u5efa\u65f6\u5f00\u59cb\u7b97\u8d77\u3002<\/p>\n

<\/p>\n

d2server:\/home\/kerberos# arp -a<\/p>\n

(211.161.17.254) at 00:04:9A:AD:1C:0A [ether] on eth0<\/p>\n

\u53ef\u4ee5\u770b\u5230\u5728\u7f13\u5b58\u4e2d\u6709\u4e00\u6761211.161.17.254\u76f8\u5bf9\u5e94\u7684arp\u7f13\u5b58\u6761\u76ee\u3002<\/p>\n

d2server:\/home\/kerberos# telnet 211.161.17.21<\/p>\n

Trying 211.161.17.21…<\/p>\n

Connected to 211.161.17.21.<\/p>\n

Escape character is ^].<\/p>\n

^].<\/p>\n

telnet>quit<\/p>\n

connetion closed.<\/p>\n

<\/p>\n

\u5728\u6267\u884c\u4e0a\u9762\u4e00\u6761telnet\u547d\u4ee4\u7684\u540c\u65f6\uff0c\u7528tcpdump\u8fdb\u884c\u76d1\u542c\uff1a<\/p>\n

<\/p>\n

d2server:\/home\/kerberos# tcpdump -e dst host 211.161.17.21<\/p>\n

tcpdump: listening on eth0<\/p>\n

<\/p>\n

\u6211\u4eec\u5c06\u4f1a\u542c\u5230\u5f88\u591a\u5305\uff0c\u6211\u4eec\u53d6\u4e0e\u6211\u4eecarp\u534f\u8bae\u76f8\u5173\u76842\u4e2a\u5305\uff1a<\/p>\n

<\/p>\n

1 0.0 00:D0:F8:0A:FB:83 FF:FF:FF:FF:FF:FF arp 60<\/p>\n

who has 211.161.17.21 tell d2server<\/p>\n

2 0.002344(0.0021) 00:E0:3C:43:0D:24 00:D0:F8:0A:FB:83 arp 60<\/p>\n

arp reply 211.161.17.21 is at 00:E0:3C:43:0D:24<\/p>\n

<\/p>\n

\u5728\u7b2c1\u884c\u4e2d\uff0c\u6e90\u7aef\u4e3b\u673a\uff08d2server\uff09\u7684\u786c\u4ef6\u5730\u5740\u662f00:D0:F8:0A:FB:83\u3002\u76ee\u7684\u7aef\u4e3b\u673a\u7684\u786c\u4ef6\u5730\u5740\u662fFF:FF:FF:FF:FF:FF\uff0c\u8fd9\u662f\u4e00\u4e2a\u4ee5\u592a\u7f51\u5e7f\u64ad\u5730\u5740\u3002\u7535\u7f06\u4e0a\u7684\u6bcf\u4e2a\u4ee5\u592a\u7f51\u63a5\u53e3\u90fd\u8981\u63a5\u6536\u8fd9\u4e2a\u6570\u636e\u5e27\u5e76\u5bf9\u5b83\u8fdb\u884c\u5904\u7406\u3002<\/p>\n

<\/p>\n

\u7b2c1\u884c\u4e2d\u7d27\u63a5\u7740\u7684\u4e00\u4e2a\u8f93\u51fa\u5b57\u6bb5\u662farp\uff0c\u8868\u660e\u5e27\u7c7b\u578b\u5b57\u6bb5\u7684\u503c\u662f0x0806\uff0c\u8bf4\u660e\u6b64\u6570\u636e\u5e27\u662f\u4e00\u4e2aARP\u8bf7\u6c42\u6216\u56de\u7b54\u3002<\/p>\n

<\/p>\n

\u5728\u6bcf\u884c\u4e2d\uff0c\u5355\u8bcd\u540e\u9762\u7684\u503c60\u6307\u7684\u662f\u4ee5\u592a\u7f51\u6570\u636e\u5e27\u7684\u957f\u5ea6\u3002\u7531\u4e8eARP\u8bf7\u6c42\u6216\u56de\u7b54\u7684\u6570\u636e\u5e27\u957f\u90fd\u662f42\u5b57\u8282\uff0828\u5b57\u8282\u7684ARP\u6570\u636e\uff0c14\u5b57\u8282\u7684\u4ee5\u592a\u7f51\u5e27\u5934\uff09\uff0c\u56e0\u6b64\uff0c\u6bcf\u4e00\u5e27\u90fd\u5fc5\u987b\u52a0\u5165\u586b\u5145\u5b57\u7b26\u4ee5\u8fbe\u5230\u4ee5\u592a\u7f51\u7684\u6700\u5c0f\u957f\u5ea6\u8981\u6c42\uff1a60\u5b57\u8282\u3002<\/p>\n

<\/p>\n

\u7b2c1\u884c\u4e2d\u7684\u4e0b\u4e00\u4e2a\u8f93\u51fa\u5b57\u6bb5arp who-has\u8868\u793a\u4f5c\u4e3aARP\u8bf7\u6c42\u7684\u8fd9\u4e2a\u6570\u636e\u5e27\u4e2d\uff0c\u76ee\u7684I P\u5730\u5740\u662f211.161.17.21\u7684\u5730\u5740\uff0c\u53d1\u9001\u7aef\u7684I P\u5730\u5740\u662fd2server\u7684\u5730\u5740\u3002tcpdump\u6253\u5370\u51fa\u4e3b\u673a\u540d\u5bf9\u5e94\u7684\u9ed8\u8ba4I P\u5730\u5740\u3002<\/p>\n

<\/p>\n

\u4ece\u7b2c2\u884c\u4e2d\u53ef\u4ee5\u770b\u5230\uff0c\u5c3d\u7ba1ARP\u8bf7\u6c42\u662f\u5e7f\u64ad\u7684\uff0c\u4f46\u662fARP\u5e94\u7b54\u7684\u76ee\u7684\u5730\u5740\u5374\u662f211.161.17.21(00:E0:3C:43:0D:24)\u3002ARP\u5e94\u7b54\u662f\u76f4\u63a5\u9001\u5230\u8bf7\u6c42\u7aef\u4e3b\u673a\u7684\uff0c\u800c\u662f\u5e7f\u64ad\u7684\u3002tcpdump\u6253\u5370\u51faarp reply\u7684\u5b57\u6837\uff0c\u540c\u65f6\u6253\u5370\u51fa\u54cd\u5e94\u8005\u7684\u4e3b\u673aip\u548c\u786c\u4ef6\u5730\u5740\u3002<\/p>\n

<\/p>\n

\u5728\u6bcf\u4e00\u884c\u4e2d\uff0c\u884c\u53f7\u540e\u9762\u7684\u6570\u5b57\u8868\u793atcpdump\u6536\u5230\u5206\u7ec4\u7684\u65f6\u95f4\uff08\u4ee5\u79d2\u4e3a\u5355\u4f4d\uff09\u3002\u9664\u7b2c1\u884c\u5916\uff0c\u6bcf\u884c\u5728\u62ec\u53f7\u4e2d\u8fd8\u5305\u542b\u4e86\u4e0e\u4e0a\u4e00\u884c\u7684\u65f6\u95f4\u5dee\u5f02\uff08\u4ee5\u79d2\u4e3a\u5355\u4f4d\uff09\u3002<\/p>\n

<\/p>\n

\u8fd9\u4e2a\u65f6\u5019\u6211\u4eec\u518d\u770b\u770b\u673a\u5668\u4e2d\u7684arp\u7f13\u5b58\uff1a<\/p>\n

<\/p>\n

d2server:\/home\/kerberos# arp -a<\/p>\n

(211.161.17.254) at 00:04:9A:AD:1C:0A [ether] on eth0<\/p>\n

(211.161.17.21) at 00:E0:3C:43:0D:24 [ether] on eth0<\/p>\n

<\/p>\n

arp\u9ad8\u901f\u7f13\u5b58\u4e2d\u5df2\u7ecf\u589e\u52a0\u4e86\u4e00\u6761\u6709\u5173211.161.17.21\u7684\u6620\u5c04\u3002<\/p>\n

<\/p>\n

\u518d\u770b\u770b\u5176\u4ed6\u7684arp\u76f8\u5173\u7684\u547d\u4ee4\uff1a<\/p>\n

<\/p>\n

d2server:\/home\/kerberos# arp -s 211.161.17.21 00:00:00:00:00:00<\/p>\n

d2server:\/home\/kerberos# arp<\/p>\n

Address HWtype HWaddress Flags Mask Iface<\/p>\n

211.161.17.254 ether 00:04:9A:AD:1C:0A C eth0<\/p>\n

211.161.17.21 ether 00:00:00:00:00:00 CM eth0<\/p>\n

d2server:\/home\/kerberos# arp -a<\/p>\n

(211.161.17.254) at 00:04:9A:AD:1C:0A [ether] on eth0<\/p>\n

(211.161.17.21) at 00:00:00:00:00:00 [ether] PERM on eth0<\/p>\n

<\/p>\n

\u53ef\u4ee5\u770b\u5230\u6211\u4eec\u7528arp -s\u9009\u9879\u8bbe\u7f6e\u4e86211.161.17.21\u5bf9\u5e94\u7684\u786c\u4ef6\u5730\u5740\u4e3a00:00:00:00:00:00\uff0c\u800c\u4e14\u8fd9\u6761\u6620\u5c04\u7684\u6807\u5fd7\u5b57\u6bb5\u4e3aCM,\u4e5f\u5c31\u662f\u8bf4\u6211\u4eec\u624b\u5de5\u8bbe\u7f6e\u7684arp\u9009\u9879\u4e3a\u9759\u6001arp\u9009\u9879\uff0c\u5b83\u4fdd\u6301\u4e0d\u53d8\u6ca1\u6709\u8d85\u65f6\uff0c\u4e0d\u50cf\u9ad8\u901f\u7f13\u5b58\u4e2d\u7684\u6761\u76ee\u8981\u5728\u4e00\u5b9a\u7684\u65f6\u95f4\u95f4\u9694\u540e\u66f4\u65b0\u3002<\/p>\n

<\/p>\n

\u5982\u679c\u60f3\u8ba9\u624b\u5de5\u8bbe\u7f6e\u7684arp\u9009\u9879\u6709\u8d85\u65f6\u65f6\u95f4\u7684\u8bdd\uff0c\u53ef\u4ee5\u52a0\u4e0atemp\u9009\u9879<\/p>\n

<\/p>\n

d2server:\/home\/kerberos# arp -s 211.161.17.21 00:00:00:00:00:00 temp<\/p>\n

d2server:\/home\/kerberos# arp -a<\/p>\n

(211.161.17.254) at 00:04:9A:AD:1C:0A [ether] on eth0<\/p>\n

(211.161.17.21) at 00:00:00:00:00:00 [ether] on eth0<\/p>\n

d2server:\/home\/kerberos# arp<\/p>\n

Address HWtype HWaddress Flags Mask Iface<\/p>\n

211.161.17.254 ether 00:04:9A:AD:1C:0A C eth0<\/p>\n

211.161.17.21 ether 00:00:00:00:00:00 C eth0<\/p>\n

<\/p>\n

\u53ef\u4ee5\u770b\u5230\u6807\u5fd7\u5b57\u6bb5\u7684\u9759\u6001arp\u6807\u5fd7”M”\u5df2\u7ecf\u53bb\u6389\u4e86\uff0c\u6211\u4eec\u624b\u5de5\u52a0\u4e0a\u7684\u662f\u4e00\u6761\u52a8\u6001\u6761\u76ee\u3002<\/p>\n

<\/p>\n

\u8bf7\u5927\u5bb6\u6ce8\u610farp\u9759\u6001\u6761\u76ee\u4e0e\u52a8\u6001\u6761\u76ee\u7684\u533a\u522b\u3002<\/p>\n

<\/p>\n

\u5728\u4e0d\u540c\u7684\u7cfb\u7edf\u4e2d\uff0c\u624b\u5de5\u8bbe\u7f6e\u7684arp\u9759\u6001\u6761\u76ee\u662f\u6709\u533a\u522b\u7684\u3002\u5728linux\u548cwin2000\u4e2d\uff0c\u9759\u6001\u6761\u76ee\u4e0d\u4f1a\u56e0\u4e3a\u4f2a\u9020\u7684arp\u54cd\u5e94\u5305\u800c\u6539\u53d8\uff0c\u800c\u52a8\u6001\u6761\u76ee\u4f1a\u6539\u53d8\u3002\u800c\u5728win98\u4e2d\uff0c\u624b\u5de5\u8bbe\u7f6e\u7684\u9759\u6001\u6761\u76ee\u4f1a\u56e0\u4e3a\u6536\u5230\u4f2a\u9020\u7684arp\u54cd\u5e94\u5305\u800c\u6539\u53d8\u3002<\/p>\n

<\/p>\n

\u5982\u679c\u60a8\u60f3\u5220\u9664\u67d0\u4e2aarp\u6761\u76ee\uff08\u5305\u62ec\u9759\u6001\u6761\u76ee\uff09\uff0c\u53ef\u4ee5\u7528\u4e0b\u9762\u7684\u547d\u4ee4\uff1a<\/p>\n

<\/p>\n

d2server:\/home\/kerberos# arp -d 211.161.17.21 <\/p>\n

d2server:\/home\/kerberos# arp -a<\/p>\n

(211.161.17.254) at 00:04:9A:AD:1C:0A [ether] on eth0<\/p>\n

(211.161.17.21) at <incomplete> on eth0<\/p>\n

<\/p>\n

\u53ef\u4ee5\u770b\u5230211.161.17.21\u7684arp\u6761\u76ee\u5df2\u7ecf\u662f\u4e0d\u5b8c\u6574\u7684\u4e86\u3002<\/p>\n

<\/p>\n

\u8fd8\u6709\u4e00\u4e9b\u5176\u4ed6\u7684\u547d\u4ee4\uff0c\u53ef\u4ee5\u53c2\u8003linux\u4e0b\u7684man\u6587\u6863\uff1a<\/p>\n

<\/p>\n

d2server:\/home\/kerberos# man arp<\/p>\n

<\/p>\n

3 ARP\u6b3a\u9a97<\/p>\n

<\/p>\n

\u6211\u4eec\u5148\u590d\u4e60\u4e00\u4e0b\u4e0a\u9762\u6240\u8bb2\u7684ARP\u534f\u8bae\u7684\u539f\u7406\u3002\u5728\u5b9e\u73b0TCP\/IP\u534f\u8bae\u7684\u7f51\u7edc\u73af\u5883\u4e0b\uff0c\u4e00\u4e2aip\u5305\u8d70\u5230\u54ea\u91cc\uff0c\u8981\u600e\u4e48\u8d70\u662f\u9760\u8def\u7531\u8868\u5b9a\u4e49\uff0c\u4f46\u662f\uff0c\u5f53ip\u5305\u5230\u8fbe\u8be5\u7f51\u7edc\u540e\uff0c\u54ea\u53f0\u673a\u5668\u54cd\u5e94\u8fd9\u4e2aip\u5305\u5374\u662f\u9760\u8be5ip\u5305\u4e2d\u6240\u5305\u542b\u7684\u786c\u4ef6mac\u5730\u5740\u6765\u8bc6\u522b\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u53ea\u6709\u673a\u5668\u7684\u786c\u4ef6mac\u5730\u5740\u548c\u8be5ip\u5305\u4e2d\u7684\u786c\u4ef6mac\u5730\u5740\u76f8\u540c\u7684\u673a\u5668\u624d\u4f1a\u5e94\u7b54\u8fd9\u4e2aip\u5305\uff0c\u56e0\u4e3a\u5728\u7f51\u7edc\u4e2d\uff0c\u6bcf\u4e00\u53f0\u4e3b\u673a\u90fd\u4f1a\u6709\u53d1\u9001ip\u5305\u7684\u65f6\u5019\uff0c\u6240\u4ee5\uff0c\u5728\u6bcf\u53f0\u4e3b\u673a\u7684\u5185\u5b58\u4e2d\uff0c\u90fd\u6709\u4e00\u4e2a arp–> \u786c\u4ef6mac \u7684\u8f6c\u6362\u8868\u3002\u901a\u5e38\u662f\u52a8\u6001\u7684\u8f6c\u6362\u8868\uff08\u8be5arp\u8868\u53ef\u4ee5\u624b\u5de5\u6dfb\u52a0\u9759\u6001\u6761\u76ee\uff09\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u8be5\u5bf9\u5e94\u8868\u4f1a\u88ab\u4e3b\u673a\u5728\u4e00\u5b9a\u7684\u65f6\u95f4\u95f4\u9694\u540e\u5237\u65b0\u3002\u8fd9\u4e2a\u65f6\u95f4\u95f4\u9694\u5c31\u662fARP\u9ad8\u901f\u7f13\u5b58\u7684\u8d85\u65f6\u65f6\u95f4\u3002<\/p>\n

<\/p>\n

\u901a\u5e38\u4e3b\u673a\u5728\u53d1\u9001\u4e00\u4e2aip\u5305\u4e4b\u524d\uff0c\u5b83\u8981\u5230\u8be5\u8f6c\u6362\u8868\u4e2d\u5bfb\u627e\u548cip\u5305\u5bf9\u5e94\u7684\u786c\u4ef6mac\u5730\u5740\uff0c\u5982\u679c\u6ca1\u6709\u627e\u5230\uff0c\u8be5\u4e3b\u673a\u5c31\u53d1\u9001\u4e00\u4e2aARP\u5e7f\u64ad\u5305\uff0c\u4e8e\u662f\uff0c\u4e3b\u673a\u5237\u65b0\u81ea\u5df1\u7684ARP\u7f13\u5b58\u3002\u7136\u540e\u53d1\u51fa\u8be5ip\u5305\u3002 <\/p>\n

<\/p>\n

\u4e86\u89e3\u8fd9\u4e9b\u5e38\u8bc6\u540e\uff0c\u73b0\u5728\u5c31\u53ef\u4ee5\u8c08\u5728\u4ee5\u592a\u7f51\u7edc\u4e2d\u5982\u4f55\u5b9e\u73b0ARP\u6b3a\u9a97\u4e86\uff0c\u53ef\u4ee5\u770b\u770b\u8fd9\u6837\u4e00\u4e2a\u4f8b\u5b50\u3002<\/p>\n

<\/p>\n

3.1 \u540c\u4e00\u7f51\u6bb5\u7684ARP\u6b3a\u9a97<\/p>\n

<\/p>\n

<\/p>\n

\u56fe2 \u540c\u4e00\u7f51\u6bb5\u7684arp\u6b3a\u9a97 <\/p>\n

<\/p>\n

\u5982\u56fe2\u6240\u793a\uff0c\u4e09\u53f0\u4e3b\u673a<\/p>\n

<\/p>\n

A: ip\u5730\u5740 192.168.0.1 \u786c\u4ef6\u5730\u5740 AA:AA:AA:AA:AA:AA<\/p>\n

B: ip\u5730\u5740 192.168.0.2 \u786c\u4ef6\u5730\u5740 BB:BB:BB:BB:BB:BB<\/p>\n

C: ip\u5730\u5740 192.168.0.3 \u786c\u4ef6\u5730\u5740 CC:CC:CC:CC:CC:CC<\/p>\n

<\/p>\n

<\/p>\n

\u4e00\u4e2a\u4f4d\u4e8e\u4e3b\u673aB\u7684\u5165\u4fb5\u8005\u60f3\u975e\u6cd5\u8fdb\u5165\u4e3b\u673aA\uff0c\u53ef\u662f\u8fd9\u53f0\u4e3b\u673a\u4e0a\u5b89\u88c5\u6709\u9632\u706b\u5899\u3002\u901a\u8fc7\u6536\u96c6\u8d44\u6599\u4ed6\u77e5\u9053\u8fd9\u53f0\u4e3b\u673aA\u7684\u9632\u706b\u5899\u53ea\u5bf9\u4e3b\u673aC\u6709\u4fe1\u4efb\u5173\u7cfb\uff08\u5f00\u653e23\u7aef\u53e3(telnet)\uff09\u3002\u800c\u4ed6\u5fc5\u987b\u8981\u4f7f\u7528telnet\u6765\u8fdb\u5165\u4e3b\u673aA\uff0c\u8fd9\u4e2a\u65f6\u5019\u4ed6\u5e94\u8be5\u5982\u4f55\u5904\u7406\u5462\uff1f<\/p>\n

<\/p>\n

\u6211\u4eec\u8fd9\u6837\u8003\u8651\uff0c\u5165\u4fb5\u8005\u5fc5\u987b\u8ba9\u4e3b\u673aA\u76f8\u4fe1\u4e3b\u673aB\u5c31\u662f\u4e3b\u673aC\uff0c\u5982\u679c\u4e3b\u673aA\u548c\u4e3b\u673aC\u4e4b\u95f4\u7684\u4fe1\u4efb\u5173\u7cfb\u662f\u5efa\u7acb\u5728ip\u5730\u5740\u4e4b\u4e0a\u7684\u3002\u5982\u679c\u5355\u5355\u628a\u4e3b\u673aB\u7684ip\u5730\u5740\u6539\u7684\u548c\u4e3b\u673aC\u7684\u4e00\u6837\uff0c\u90a3\u662f\u4e0d\u80fd\u5de5\u4f5c\u7684\uff0c\u81f3\u5c11\u4e0d\u80fd\u53ef\u9760\u5730\u5de5\u4f5c\u3002\u5982\u679c\u4f60\u544a\u8bc9\u4ee5\u592a\u7f51\u5361\u8bbe\u5907\u9a71\u52a8\u7a0b\u5e8f\uff0c \u81ea\u5df1IP\u662f192.168.0.3\uff0c\u90a3\u4e48\u8fd9\u53ea\u662f\u4e00\u79cd\u7eaf\u7cb9\u7684\u7ade\u4e89\u5173\u7cfb\uff0c\u5e76\u4e0d\u80fd\u8fbe\u5230\u76ee\u6807\u3002\u6211\u4eec\u53ef\u4ee5\u5148\u7814\u7a76C\u8fd9\u53f0\u673a\u5668\u5982\u679c\u6211\u4eec\u80fd\u8ba9\u8fd9\u53f0\u673a\u5668\u6682\u65f6\u5f53\u6389\uff0c\u7ade\u4e89\u5173\u7cfb\u5c31\u53ef\u4ee5\u89e3\u9664,\u8fd9\u4e2a\u8fd8\u662f\u6709\u53ef\u80fd\u5b9e\u73b0\u7684\u3002\u5728\u673a\u5668C\u5f53\u6389\u7684\u540c\u65f6\uff0c\u5c06\u673a\u5668B\u7684ip\u5730\u5740\u6539\u4e3a192.168.0.3,\u8fd9\u6837\u5c31\u53ef\u4ee5\u6210\u529f\u7684\u901a\u8fc723\u7aef\u53e3telnet\u5230\u673a\u5668A\u4e0a\u9762\uff0c\u800c\u6210\u529f\u7684\u7ed5\u8fc7\u9632\u706b\u5899\u7684\u9650\u5236\u3002<\/p>\n

<\/p>\n

\u4e0a\u9762\u7684\u8fd9\u79cd\u60f3\u6cd5\u5728\u4e0b\u9762\u7684\u60c5\u51b5\u4e0b\u662f\u6ca1\u6709\u4f5c\u7528\u7684\uff0c\u5982\u679c\u4e3b\u673aA\u548c\u4e3b\u673aC\u4e4b\u95f4\u7684\u4fe1\u4efb\u5173\u7cfb\u662f\u5efa\u7acb\u5728\u786c\u4ef6\u5730\u5740\u7684\u57fa\u7840\u4e0a\u3002\u8fd9\u4e2a\u65f6\u5019\u8fd8\u9700\u8981\u7528ARP\u6b3a\u9a97\u7684\u624b\u6bb5\u8ba9\u4e3b\u673aA\u628a\u81ea\u5df1\u7684ARP\u7f13\u5b58\u4e2d\u7684\u5173\u4e8e192.168.0.3\u6620\u5c04\u7684\u786c\u4ef6\u5730\u5740\u6539\u4e3a\u4e3b\u673aB\u7684\u786c\u4ef6\u5730\u5740\u3002<\/p>\n

<\/p>\n

\u6211\u4eec\u53ef\u4ee5\u4eba\u4e3a\u7684\u5236\u9020\u4e00\u4e2aarp_reply\u7684\u54cd\u5e94\u5305,\u53d1\u9001\u7ed9\u60f3\u8981\u6b3a\u9a97\u7684\u4e3b\u673a,\u8fd9\u662f\u53ef\u4ee5\u5b9e\u73b0\u7684,\u56e0\u4e3a\u534f\u8bae\u5e76\u6ca1\u6709\u89c4\u5b9a\u5fc5\u987b\u5728\u63a5\u6536\u5230arp_echo\u540e\u624d\u53ef\u4ee5\u53d1\u9001\u54cd\u5e94\u5305.\u8fd9\u6837\u7684\u5de5\u5177\u5f88\u591a,\u6211\u4eec\u4e5f\u53ef\u4ee5\u76f4\u63a5\u7528snifferpro\u6293\u4e00\u4e2aarp\u54cd\u5e94\u5305,\u7136\u540e\u8fdb\u884c\u4fee\u6539\u3002 <\/p>\n

<\/p>\n

\u4f60\u53ef\u4ee5\u4eba\u4e3a\u5730\u5236\u9020\u8fd9\u4e2a\u5305\u3002\u53ef\u4ee5\u6307\u5b9aARP\u5305\u4e2d\u7684\u6e90IP\u3001\u76ee\u6807IP\u3001\u6e90MAC\u5730\u5740\u3001\u76ee\u6807MAC\u5730\u5740\u3002<\/p>\n

<\/p>\n

\u8fd9\u6837\u4f60\u5c31\u53ef\u4ee5\u901a\u8fc7\u865a\u5047\u7684ARP\u54cd\u5e94\u5305\u6765\u4fee\u6539\u4e3b\u673aA\u4e0a\u7684\u52a8\u6001ARP\u7f13\u5b58\u8fbe\u5230\u6b3a\u9a97\u7684\u76ee\u7684\u3002<\/p>\n

<\/p>\n

\u4e0b\u9762\u662f\u5177\u4f53\u7684\u6b65\u9aa4\uff1a<\/p>\n

<\/p>\n

\u4ed6\u5148\u7814\u7a76192.0.0.3\u8fd9\u53f0\u4e3b\u673a\uff0c\u53d1\u73b0\u8fd9\u53f0\u4e3b\u673a\u7684\u6f0f\u6d1e\u3002 <\/p>\n

\u6839\u636e\u53d1\u73b0\u7684\u6f0f\u6d1e\u4f7f\u4e3b\u673aC\u5f53\u6389\uff0c\u6682\u65f6\u505c\u6b62\u5de5\u4f5c\u3002 <\/p>\n

\u8fd9\u6bb5\u65f6\u95f4\u91cc\uff0c\u5165\u4fb5\u8005\u628a\u81ea\u5df1\u7684ip\u6539\u6210192.0.0.3 <\/p>\n

\u4ed6\u7528\u5de5\u5177\u53d1\u4e00\u4e2a\u6e90ip\u5730\u5740\u4e3a192.168.0.3\u6e90MAC\u5730\u5740\u4e3aBB:BB:BB:BB:BB:BB\u7684\u5305\u7ed9\u4e3b\u673aA\uff0c\u8981\u6c42\u4e3b\u673aA\u66f4\u65b0\u81ea\u5df1\u7684arp\u8f6c\u6362\u8868\u3002 <\/p>\n

\u4e3b\u673a\u66f4\u65b0\u4e86arp\u8868\u4e2d\u5173\u4e8e\u4e3b\u673aC\u7684ip–>mac\u5bf9\u5e94\u5173\u7cfb\u3002 <\/p>\n

\u9632\u706b\u5899\u5931\u6548\u4e86\uff0c\u5165\u4fb5\u7684ip\u53d8\u6210\u5408\u6cd5\u7684mac\u5730\u5740\uff0c\u53ef\u4ee5telnet \u4e86\u3002 <\/p>\n

\u4e0a\u9762\u5c31\u662f\u4e00\u4e2aARP\u7684\u6b3a\u9a97\u8fc7\u7a0b\uff0c\u8fd9\u662f\u5728\u540c\u7f51\u6bb5\u53d1\u751f\u7684\u60c5\u51b5\uff0c\u4f46\u662f\uff0c\u63d0\u9192\u6ce8\u610f\u7684\u662f\uff0c\u5728B\u548cC\u5904\u4e8e\u4e0d\u540c\u7f51\u6bb5\u7684\u65f6\u5019\uff0c\u4e0a\u9762\u7684\u65b9\u6cd5\u662f\u4e0d\u8d77\u4f5c\u7528\u7684\u3002<\/p>\n

<\/p>\n

3.2 \u4e0d\u540c\u7f51\u6bb5\u7684ARP\u6b3a\u9a97<\/p>\n

<\/p>\n

<\/p>\n

\u56fe3 \u4e0d\u540c\u7f51\u6bb5\u4e4b\u95f4\u7684ARP\u6b3a\u9a97<\/p>\n

<\/p>\n

\u5982\u56fe3\u6240\u793aA\u3001C\u4f4d\u4e8e\u540c\u4e00\u7f51\u6bb5\u800c\u4e3b\u673aB\u4f4d\u4e8e\u53e6\u4e00\u7f51\u6bb5\uff0c\u4e09\u53f0\u673a\u5668\u7684ip\u5730\u5740\u548c\u786c\u4ef6\u5730\u5740\u5982\u4e0b\uff1a<\/p>\n

<\/p>\n

A: ip\u5730\u5740 192.168.0.1 \u786c\u4ef6\u5730\u5740 AA:AA:AA:AA:AA:AA<\/p>\n

B: ip\u5730\u5740 192.168.1.2 \u786c\u4ef6\u5730\u5740 BB:BB:BB:BB:BB:BB<\/p>\n

C: ip\u5730\u5740 192.168.0.3 \u786c\u4ef6\u5730\u5740 CC:CC:CC:CC:CC:CC<\/p>\n

<\/p>\n

\u5728\u73b0\u5728\u7684\u60c5\u51b5\u4e0b\uff0c\u4f4d\u4e8e192.168.1\u7f51\u6bb5\u7684\u4e3b\u673aB\u5982\u4f55\u5192\u5145\u4e3b\u673aC\u6b3a\u9a97\u4e3b\u673aA\u5462\uff1f\u663e\u7136\u7528\u4e0a\u9762\u7684\u529e\u6cd5\u7684\u8bdd\uff0c\u5373\u4f7f\u6b3a\u9a97\u6210\u529f\uff0c\u90a3\u4e48\u7531\u4e3b\u673aB\u548c\u4e3b\u673aA\u4e4b\u95f4\u4e5f\u65e0\u6cd5\u5efa\u7acbtelnet\u4f1a\u8bdd\uff0c\u56e0\u4e3a\u8def\u7531\u5668\u4e0d\u4f1a\u628a\u4e3b\u673aA\u53d1\u7ed9\u4e3b\u673aB\u7684\u5305\u5411\u5916\u8f6c\u53d1\uff0c\u8def\u7531\u5668\u4f1a\u53d1\u73b0\u5730\u5740\u5728192.168.0.\u8fd9\u4e2a\u7f51\u6bb5\u4e4b\u5185\u3002<\/p>\n

<\/p>\n

\u73b0\u5728\u5c31\u6d89\u53ca\u5230\u53e6\u5916\u4e00\u79cd\u6b3a\u9a97\u65b9\u5f0f\u2015ICMP\u91cd\u5b9a\u5411\u3002\u628aARP\u6b3a\u9a97\u548cICMP\u91cd\u5b9a\u5411\u7ed3\u5408\u5728\u4e00\u8d77\u5c31\u53ef\u4ee5\u57fa\u672c\u5b9e\u73b0\u8de8\u7f51\u6bb5\u6b3a\u9a97\u7684\u76ee\u7684\u3002<\/p>\n

<\/p>\n

\u4ec0\u4e48\u662fICMP\u91cd\u5b9a\u5411\u5462\uff1f<\/p>\n

<\/p>\n

ICMP\u91cd\u5b9a\u5411\u62a5\u6587\u662fICMP\u63a7\u5236\u62a5\u6587\u4e2d\u7684\u4e00\u79cd\u3002\u5728\u7279\u5b9a\u7684\u60c5\u51b5\u4e0b\uff0c\u5f53\u8def\u7531\u5668\u68c0\u6d4b\u5230\u4e00\u53f0\u673a\u5668\u4f7f\u7528\u975e\u4f18\u5316\u8def\u7531\u7684\u65f6\u5019\uff0c\u5b83\u4f1a\u5411\u8be5\u4e3b\u673a\u53d1\u9001\u4e00\u4e2aICMP\u91cd\u5b9a\u5411\u62a5\u6587\uff0c\u8bf7\u6c42\u4e3b\u673a\u6539\u53d8\u8def\u7531\u3002\u8def\u7531\u5668\u4e5f\u4f1a\u628a\u521d\u59cb\u6570\u636e\u62a5\u5411\u5b83\u7684\u76ee\u7684\u5730\u8f6c\u53d1\u3002<\/p>\n

<\/p>\n

\u6211\u4eec\u53ef\u4ee5\u5229\u7528ICMP\u91cd\u5b9a\u5411\u62a5\u6587\u8fbe\u5230\u6b3a\u9a97\u7684\u76ee\u7684\u3002<\/p>\n

<\/p>\n

\u4e0b\u9762\u662f\u7ed3\u5408ARP\u6b3a\u9a97\u548cICMP\u91cd\u5b9a\u5411\u8fdb\u884c\u653b\u51fb\u7684\u6b65\u9aa4\uff1a<\/p>\n

<\/p>\n

\u4e3a\u4e86\u4f7f\u81ea\u5df1\u53d1\u51fa\u7684\u975e\u6cd5ip\u5305\u80fd\u5728\u7f51\u7edc\u4e0a\u80fd\u591f\u5b58\u6d3b\u957f\u4e45\u4e00\u70b9\uff0c\u5f00\u59cb\u4fee\u6539ip\u5305\u7684\u751f\u5b58\u65f6\u95f4ttl\u4e3a\u4e0b\u9762\u7684\u8fc7\u7a0b\u4e2d\u53ef\u80fd\u5e26\u6765\u7684\u95ee\u9898\u505a\u51c6\u5907\u3002\u628attl\u6539\u6210255. (ttl\u5b9a\u4e49\u4e00\u4e2aip\u5305\u5982\u679c\u5728\u7f51\u7edc\u4e0a\u5230\u4e0d\u4e86\u4e3b\u673a\u540e\uff0c\u5728\u7f51\u7edc\u4e0a\u80fd\u5b58\u6d3b\u7684\u65f6\u95f4\uff0c\u6539\u957f\u4e00\u70b9\u5728\u672c\u4f8b\u4e2d\u6709\u5229\u4e8e\u505a\u5145\u8db3\u7684\u5e7f\u64ad) <\/p>\n

\u4e0b\u8f7d\u4e00\u4e2a\u53ef\u4ee5\u81ea\u7531\u5236\u4f5c\u5404\u79cd\u5305\u7684\u5de5\u5177\uff08\u4f8b\u5982hping2\uff09 <\/p>\n

\u7136\u540e\u548c\u4e0a\u9762\u4e00\u6837\uff0c\u5bfb\u627e\u4e3b\u673aC\u7684\u6f0f\u6d1e\u6309\u7167\u8fd9\u4e2a\u6f0f\u6d1e\u5f53\u6389\u4e3b\u673aC\u3002 <\/p>\n

\u5728\u8be5\u7f51\u7edc\u7684\u4e3b\u673a\u627e\u4e0d\u5230\u539f\u6765\u7684192.0.0.3\u540e\uff0c\u5c06\u66f4\u65b0\u81ea\u5df1\u7684ARP\u5bf9\u5e94\u8868\u3002\u4e8e\u662f\u4ed6\u53d1\u9001\u4e00\u4e2a\u539fip\u5730\u5740\u4e3a192.168.0.3\u786c\u4ef6\u5730\u5740\u4e3aBB:BB:BB:BB:BB:BB\u7684ARP\u54cd\u5e94\u5305\u3002 <\/p>\n

\u597d\u4e86\uff0c\u73b0\u5728\u6bcf\u53f0\u4e3b\u673a\u90fd\u77e5\u9053\u4e86\uff0c\u4e00\u4e2a\u65b0\u7684MAC\u5730\u5740\u5bf9\u5e94192.0.0.3,\u4e00\u4e2aARP\u6b3a\u9a97\u5b8c\u6210\u4e86\uff0c\u4f46\u662f\uff0c\u6bcf\u53f0\u4e3b\u673a\u90fd\u53ea\u4f1a\u5728\u5c40\u57df\u7f51\u4e2d\u627e\u8fd9\u4e2a\u5730\u5740\u800c\u6839\u672c\u5c31\u4e0d\u4f1a\u628a\u53d1\u9001\u7ed9192.0.0.3\u7684ip\u5305\u4e22\u7ed9\u8def\u7531\u3002\u4e8e\u662f\u4ed6\u8fd8\u5f97\u6784\u9020\u4e00\u4e2aICMP\u7684\u91cd\u5b9a\u5411\u5e7f\u64ad\u3002 <\/p>\n

\u81ea\u5df1\u5b9a\u5236\u4e00\u4e2aICMP\u91cd\u5b9a\u5411\u5305\u544a\u8bc9\u7f51\u7edc\u4e2d\u7684\u4e3b\u673a\uff1a”\u5230192.0.0.3\u7684\u8def\u7531\u6700\u77ed\u8def\u5f84\u4e0d\u662f\u5c40\u57df\u7f51\uff0c\u800c\u662f\u8def\u7531\uff0c\u8bf7\u4e3b\u673a\u91cd\u5b9a\u5411\u4f60\u4eec\u7684\u8def\u7531\u8def\u5f84\uff0c\u628a\u6240\u6709\u5230192.0.0.3\u7684ip\u5305\u4e22\u7ed9\u8def\u7531\u3002” <\/p>\n

\u4e3b\u673aA\u63a5\u53d7\u8fd9\u4e2a\u5408\u7406\u7684ICMP\u91cd\u5b9a\u5411\uff0c\u4e8e\u662f\u4fee\u6539\u81ea\u5df1\u7684\u8def\u7531\u8def\u5f84\uff0c\u628a\u5bf9192.0.0.3\u7684\u901a\u8baf\u90fd\u4e22\u7ed9\u8def\u7531\u5668\u3002 <\/p>\n

\u5165\u4fb5\u8005\u7ec8\u4e8e\u53ef\u4ee5\u5728\u8def\u7531\u5916\u6536\u5230\u6765\u81ea\u8def\u7531\u5185\u7684\u4e3b\u673a\u7684ip\u5305\u4e86\uff0c\u4ed6\u53ef\u4ee5\u5f00\u59cbtelnet\u5230\u4e3b\u673a\u768423\u53e3\u3002 <\/p>\n

\u5176\u5b9e\u4e0a\u9762\u7684\u60f3\u6cd5\u53ea\u662f\u4e00\u79cd\u7406\u60f3\u8bdd\u7684\u60c5\u51b5\uff0c\u4e3b\u673a\u8bb8\u53ef\u63a5\u6536\u7684ICMP\u91cd\u5b9a\u5411\u5305\u5176\u5b9e\u6709\u5f88\u591a\u7684\u9650\u5236\u6761\u4ef6\uff0c\u8fd9\u4e9b\u6761\u4ef6\u4f7fICMP\u91cd\u5b9a\u5411\u53d8\u7684\u975e\u5e38\u56f0\u96be\u3002<\/p>\n

<\/p>\n

TCP\/IP\u534f\u8bae\u5b9e\u73b0\u4e2d\u5173\u4e8e\u4e3b\u673a\u63a5\u6536ICMP\u91cd\u5b9a\u5411\u62a5\u6587\u4e3b\u8981\u6709\u4e0b\u9762\u51e0\u6761\u9650\u5236\uff1a<\/p>\n

<\/p>\n

\u65b0\u8def\u7531\u5fc5\u987b\u662f\u76f4\u8fbe\u7684 <\/p>\n

\u91cd\u5b9a\u5411\u5305\u5fc5\u987b\u6765\u81ea\u53bb\u5f80\u76ee\u6807\u7684\u5f53\u524d\u8def\u7531 <\/p>\n

\u91cd\u5b9a\u5411\u5305\u4e0d\u80fd\u901a\u77e5\u4e3b\u673a\u7528\u81ea\u5df1\u505a\u8def\u7531 <\/p>\n

\u88ab\u6539\u53d8\u7684\u8def\u7531\u5fc5\u987b\u662f\u4e00\u6761\u95f4\u63a5\u8def\u7531 <\/p>\n

\u7531\u4e8e\u6709\u8fd9\u4e9b\u9650\u5236\uff0c\u6240\u4ee5ICMP\u6b3a\u9a97\u5b9e\u9645\u4e0a\u5f88\u96be\u5b9e\u73b0\u3002\u4f46\u662f\u6211\u4eec\u4e5f\u53ef\u4ee5\u4e3b\u52a8\u7684\u6839\u636e\u4e0a\u9762\u7684\u601d\u7ef4\u5bfb\u627e\u4e00\u4e9b\u5176\u4ed6\u7684\u65b9\u6cd5\u3002\u66f4\u4e3a\u91cd\u8981\u7684\u662f\u6211\u4eec\u77e5\u9053\u4e86\u8fd9\u4e9b\u6b3a\u9a97\u65b9\u6cd5\u7684\u5371\u5bb3\u6027\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u91c7\u53d6\u76f8\u5e94\u7684\u9632\u5fa1\u529e\u6cd5\u3002<\/p>\n

<\/p>\n

3.3 ARP\u6b3a\u9a97\u7684\u9632\u5fa1<\/p>\n

<\/p>\n

\u77e5\u9053\u4e86ARP\u6b3a\u9a97\u7684\u65b9\u6cd5\u548c\u5371\u5bb3\uff0c\u6211\u4eec\u7ed9\u51fa\u4e00\u4e9b\u521d\u6b65\u7684\u9632\u5fa1\u65b9\u6cd5\uff1a<\/p>\n

<\/p>\n

\u4e0d\u8981\u628a\u4f60\u7684\u7f51\u7edc\u5b89\u5168\u4fe1\u4efb\u5173\u7cfb\u5efa\u7acb\u5728ip\u5730\u5740\u7684\u57fa\u7840\u4e0a\u6216\u786c\u4ef6mac\u5730\u5740\u57fa\u7840\u4e0a\uff0c\uff08rarp\u540c\u6837\u5b58\u5728\u6b3a\u9a97\u7684\u95ee\u9898\uff09\uff0c\u7406\u60f3\u7684\u5173\u7cfb\u5e94\u8be5\u5efa\u7acb\u5728ip+mac\u57fa\u7840\u4e0a\u3002 <\/p>\n

\u8bbe\u7f6e\u9759\u6001\u7684mac–>ip\u5bf9\u5e94\u8868\uff0c\u4e0d\u8981\u8ba9\u4e3b\u673a\u5237\u65b0\u4f60\u8bbe\u5b9a\u597d\u7684\u8f6c\u6362\u8868\u3002 <\/p>\n

\u9664\u975e\u5f88\u6709\u5fc5\u8981\uff0c\u5426\u5219\u505c\u6b62\u4f7f\u7528ARP\uff0c\u5c06ARP\u505a\u4e3a\u6c38\u4e45\u6761\u76ee\u4fdd\u5b58\u5728\u5bf9\u5e94\u8868\u4e2d\u3002\u5728linux\u4e0b\u53ef\u4ee5\u7528ifconfig -arp\u53ef\u4ee5\u4f7f\u7f51\u5361\u9a71\u52a8\u7a0b\u5e8f\u505c\u6b62\u4f7f\u7528ARP\u3002 <\/p>\n

\u4f7f\u7528\u4ee3\u7406\u7f51\u5173\u53d1\u9001\u5916\u51fa\u7684\u901a\u8baf\u3002 <\/p>\n

\u4fee\u6539\u7cfb\u7edf\u62d2\u6536ICMP\u91cd\u5b9a\u5411\u62a5\u6587 <\/p>\n

\u5728linux\u4e0b\u53ef\u4ee5\u901a\u8fc7\u5728\u9632\u706b\u5899\u4e0a\u62d2\u7eddICMP\u91cd\u5b9a\u5411\u62a5\u6587\u6216\u8005\u662f\u4fee\u6539\u5185\u6838\u9009\u9879\u91cd\u65b0\u7f16\u8bd1\u5185\u6838\u6765\u62d2\u7edd\u63a5\u6536ICMP\u91cd\u5b9a\u5411\u62a5\u6587\u3002<\/p>\n

<\/p>\n

\u5728win2000\u4e0b\u53ef\u4ee5\u901a\u8fc7\u9632\u706b\u5899\u548cIP\u7b56\u7565\u62d2\u7edd\u63a5\u6536ICMP\u62a5\u6587\u3002<\/p>\n

<\/p>\n

4 \u4ee3\u7406ARP\u7684\u5e94\u7528<\/p>\n

<\/p>\n

\u4ee3\u7406ARP\u6709\u4e24\u5927\u5e94\u7528,\u4e00\u4e2a\u662f\u6709\u5229\u7684\u5c31\u662f\u6211\u4eec\u5728\u9632\u706b\u5899\u5b9e\u73b0\u4e2d\u5e38\u8bf4\u7684\u900f\u660e\u6a21\u5f0f\u7684\u5b9e\u73b0,\u53e6\u4e00\u4e2a\u662f\u6709\u5bb3\u7684\u5c31\u662f\u901a\u8fc7\u5b83\u53ef\u4ee5\u8fbe\u5230\u5728\u4ea4\u6362\u73af\u5883\u4e2d\u8fdb\u884c\u55c5\u63a2\u7684\u76ee\u7684.\u7531\u6b64\u53ef\u89c1\u540c\u6837\u4e00\u79cd\u6280\u672f\u88ab\u5e94\u7528\u4e8e\u4e0d\u540c\u7684\u76ee\u7684,\u6548\u679c\u662f\u4e0d\u4e00\u6837\u7684.<\/p>\n

<\/p>\n

\u6211\u4eec\u5148\u6765\u770b\u4ea4\u6362\u73af\u5883\u4e2d\u5c40\u57df\u7f51\u7684\u55c5\u63a2.<\/p>\n

<\/p>\n

\u901a\u5e38\u5728\u5c40\u57df\u7f51\u73af\u5883\u4e2d\uff0c\u6211\u4eec\u90fd\u662f\u901a\u8fc7\u4ea4\u6362\u73af\u5883\u7684\u7f51\u5173\u4e0a\u7f51\u7684\u3002\u5728\u4ea4\u6362\u73af\u5883\u4e2d\u4f7f\u7528NetXray\u6216\u8005NAI Sniffer\u4e00\u7c7b\u7684\u55c5\u63a2\u5de5\u5177\u9664\u4e86\u6293\u5230\u81ea\u5df1\u7684\u5305\u4ee5\u5916\uff0c\u662f\u4e0d\u80fd\u770b\u5230\u5176\u4ed6\u4e3b\u673a\u7684\u7f51\u7edc\u901a\u4fe1\u7684\u3002<\/p>\n

<\/p>\n

\u4f46\u662f\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5229\u7528ARP\u6b3a\u9a97\u53ef\u4ee5\u5b9e\u73b0Sniffer\u7684\u76ee\u7684\u3002<\/p>\n

<\/p>\n

ARP\u534f\u8bae\u662f\u5c06IP\u5730\u5740\u89e3\u6790\u4e3aMAC\u5730\u5740\u7684\u534f\u8bae\uff0c\u5c40\u57df\u7f51\u4e2d\u7684\u901a\u4fe1\u90fd\u662f\u57fa\u4e8eMAC\u5730\u5740\u7684\u3002<\/p>\n

<\/p>\n

<\/p>\n

\u56fe4 \u4ea4\u6362\u7f51\u7edc\u4e2d\u7684ARP\u6b3a\u9a97 <\/p>\n

<\/p>\n

\u5982\u56fe4\u6240\u793a\uff0c\u4e09\u53f0\u4e3b\u673a\u4f4d\u4e8e\u4e00\u4e2a\u4ea4\u6362\u7f51\u7edc\u7684\u73af\u5883\u4e2d\uff0c\u5176\u4e2dA\u662f\u7f51\u5173\uff1a<\/p>\n

<\/p>\n

A: ip\u5730\u5740 192.168.0.1 \u786c\u4ef6\u5730\u5740 AA:AA:AA:AA:AA<\/p>\n

B: ip\u5730\u5740 192.168.0.2 \u786c\u4ef6\u5730\u5740 BB:BB:BB:BB:BB<\/p>\n

C\uff1aip\u5730\u5740 192.168.0.3 \u786c\u4ef6\u5730\u5740 CC:CC:CC:CC:CC<\/p>\n

<\/p>\n

\u5728\u5c40\u57df\u7f51\u4e2d192.168.0.2\u548c192.168.0.3\u90fd\u662f\u901a\u8fc7\u7f51\u5173192.168.0.1\u4e0a\u7f51\u7684\uff0c\u5047\u5b9a\u653b\u51fb\u8005\u7684\u7cfb\u7edf\u4e3a192.168.0.2\uff0c\u4ed6\u5e0c\u671b\u542c\u5230192.168.0.3\u7684\u901a\u4fe1\uff0c\u90a3\u4e48\u6211\u4eec\u5c31\u53ef\u4ee5\u5229\u7528ARP\u6b3a\u9a97\u5b9e\u73b0\u3002<\/p>\n

<\/p>\n

\u8fd9\u79cd\u6b3a\u9a97\u7684\u4e2d\u5fc3\u539f\u5219\u5c31\u662farp\u4ee3\u7406\u7684\u5e94\u7528.\u4e3b\u673aA\u662f\u5c40\u57df\u7f51\u4e2d\u7684\u4ee3\u7406\u670d\u52a1\u5668,\u5c40\u57df\u7f51\u4e2d\u6bcf\u4e2a\u8282\u70b9\u7684\u5411\u5916\u7684\u901a\u4fe1\u90fd\u8981\u901a\u8fc7\u5b83.\u4e3b\u673aB\u60f3\u8981\u542c\u4e3b\u673aC\u7684\u901a\u4fe1,\u5b83\u9700\u8981\u5148\u4f7f\u7528ARP\u6b3a\u9a97,\u8ba9\u4e3b\u673aC\u8ba4\u4e3a\u5b83\u5c31\u662f\u4e3b\u673aA,\u8fd9\u4e2a\u65f6\u5019\u5b83\u53d1\u4e00\u4e2aIP\u5730\u5740\u4e3a192.168.0.1,\u7269\u7406\u5730\u5740\u4e3aBB:BB:BB:BB:BB:BB\u7684ARP\u54cd\u5e94\u5305\u7ed9\u4e3b\u673aC,\u8fd9\u6837\u4e3b\u673aC\u4f1a\u628a\u53d1\u5f80\u4e3b\u673aA\u7684\u5305\u53d1\u5f80\u4e3b\u673aB.\u540c\u7406,\u8fd8\u8981\u8ba9\u7f51\u5173A\u76f8\u4fe1\u5b83\u5c31\u662f\u4e3b\u673aC,\u5411\u7f51\u5173A\u53d1\u9001\u4e00\u4e2aIP\u5730\u5740\u4e3a192.168.0.3,\u7269\u7406\u5730\u5740\u4e3aBB:BB:BB:BB:BB:BB\u7684\u5305.<\/p>\n

<\/p>\n

\u4e0a\u9762\u8fd9\u4e00\u6b65\u7684\u64cd\u4f5c\u548c\u524d\u9762\u7684ARP\u6b3a\u9a97\u7684\u539f\u7406\u662f\u4e00\u6837\u7684,\u4f46\u662f\u8fd8\u662f\u6709\u95ee\u9898,\u8fc7\u4e00\u6bb5\u65f6\u95f4\u4e3b\u673aB\u4f1a\u53d1\u73b0\u81ea\u5df1\u65e0\u6cd5\u4e0a\u7f51.\u6240\u4ee5\u4e0b\u9762\u8fd8\u6709\u4e00\u4e2a\u6b65\u9aa4\u5c31\u662f\u9700\u8981\u5728\u4e3b\u673aB\u4e0a\u8f6c\u53d1\u4ece\u4e3b\u673aA\u5230\u4e3b\u673aC\u7684\u5305,\u5e76\u4e14\u8f6c\u53d1\u4ece\u4e3b\u673aC\u5230\u4e3b\u673aA\u7684\u5305.\u73b0\u5728\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u5176\u5b9e\u4e3b\u673aB\u5728\u4e3b\u673aA\u548c\u4e3b\u673aC\u7684\u901a\u8baf\u4e2d\u8d77\u5230\u4e86\u4e00\u4e2a\u4ee3\u7406\u7684\u4f5c\u7528,\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u53eb\u505aARP\u4ee3\u7406\u7684\u539f\u56e0.<\/p>\n

<\/p>\n

\u5177\u4f53\u5b9e\u73b0\u8981\u7528\u5230\u4e24\u4e2a\u5de5\u5177dsniff\u548cfragrouter,dsniff\u7528\u6765\u5b9e\u73b0ARP\u6b3a\u9a97,fragroute\u7528\u6765\u8fdb\u884c\u5305\u7684\u8f6c\u53d1.<\/p>\n

<\/p>\n

\u9996\u5148\u5229\u7528dsniff\u4e2d\u7684arpspoof\u6765\u5b9e\u73b0ARP\u6b3a\u9a97,dsniff\u8f6f\u4ef6\u53ef\u4ee5\u5728\u4e0b\u9762\u7684\u7f51\u5740\u4e0b\u8f7d:<\/p>\n

<\/p>\n

http:\/\/naughty.monkey.org\/~dugsong\/dsniff<\/p>\n

<\/p>\n

\u5b89\u88c5\u8fd9\u4e2a\u8f6f\u4ef6\u5305\u4e4b\u524d\u5148\u8981\u4e0b\u8f7d\u5b89\u88c5libnet.<\/p>\n

<\/p>\n

\u6b3a\u9a97192.168.0.3\uff0c\u544a\u8bc9\u8fd9\u53f0\u673a\u5668\u7f51\u5173192.168.0.1\u7684MAC\u5730\u5740\u662f192.168.0.2\u7684MAC\u5730\u5740. <\/p>\n

<\/p>\n

[root@sound dsniff-2.3]# .\/arpspoof -i eth0 -t 192.168.0.3 192.168.0.1<\/p>\n

\u6b3a\u9a97192.168.0.1\uff0c\u544a\u8bc9192.168.0.1\u4e3b\u673a192.168.0.3\u7684MAC\u5730\u5740\u662f192.168.0.2\u7684MAC\u5730\u5740\u3002<\/p>\n

<\/p>\n

[root@sound dsniff-2.3]# .\/arpspoof -i eth0 -t 192.168.0.1 192.168.0.3<\/p>\n

\u73b0\u5728\u6211\u4eec\u5df2\u7ecf\u5b8c\u6210\u4e86\u7b2c\u4e00\u6b65\u7684\u6b3a\u9a97,\u8fd9\u4e2a\u6b3a\u9a97\u662f\u901a\u8fc7arpspoof\u6765\u5b8c\u6210\u7684,\u5f53\u7136\u60a8\u4e5f\u53ef\u4ee5\u4f7f\u7528\u522b\u7684\u5de5\u5177\u751a\u81f3\u81ea\u5df1\u53d1\u5305\u6765\u5b8c\u6210.\u73b0\u5728\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u5728\u4e3b\u673aA\u548c\u4e3b\u673aC\u7684arp\u5217\u8868\u91cc\u9762\u90fd\u5b8c\u6210\u4e86\u6211\u4eec\u9700\u8981\u7684\u5de5\u4f5c.\u5728\u540e\u9762\u7684\u900f\u660e\u4ee3\u7406\u4e2d\u6211\u4eec\u5c06\u4f7f\u7528\u53e6\u5916\u4e00\u79cd\u4e0d\u540c\u7684\u7406\u5ff5.<\/p>\n

<\/p>\n

\u4e0b\u9762\u6211\u4eec\u5148\u6253\u5f00linux\u7cfb\u7edf\u4e2d\u7684\u8f6c\u53d1\u5305\u7684\u9009\u9879:<\/p>\n

<\/p>\n

[root@sound \/root]# echo “1” >\/proc\/sys\/net\/ipv4\/ip_forward<\/p>\n

\u4e0b\u9762\u6211\u4eec\u53ef\u4ee5\u4e0b\u8f7d\u5927\u540d\u9f0e\u9f0e\u7684dugsong\u7684\u53e6\u5916\u4e00\u4e2a\u5de5\u5177fragroute,\u8fd9\u4e2a\u5de5\u5177\u4ee5\u524d\u53eb\u505afragrouter(\u4ec5\u67091\u5b57\u7684\u5dee\u522b)\u4e3b\u8981\u7528\u4e8e\u5b9e\u73b0\u5165\u4fb5\u68c0\u6d4b\u7cfb\u7edf\u5904\u7406\u5206\u7247\u7684ip\u548ctcp\u5305\u529f\u80fd\u7684\u68c0\u6d4b,\u672c\u8eab\u81ea\u4ee3\u5305\u8f6c\u53d1\u7684\u529f\u80fd.\u53ef\u4ee5\u5230\u4e0b\u9762\u7684\u7f51\u7ad9\u4e0b\u8f7d:<\/p>\n

<\/p>\n

http:\/\/monkey.org\/~dugsong\/fragroute\/<\/p>\n

<\/p>\n

\u5b89\u88c5\u8fd9\u4e2a\u8f6f\u4ef6\u5305\u4e4b\u524d\u5148\u8981\u4e0b\u8f7d\u5b89\u88c5libpcap\u548clibevent.<\/p>\n

<\/p>\n

\u5f53\u7136\u6211\u4eec\u4e5f\u53ef\u4ee5\u4f7f\u7528fragrouter\u6765\u5b8c\u6210:<\/p>\n

<\/p>\n

http:\/\/www.packetstormsecurity.org\/groups\/ w00w00\/sectools\/fragrouter\/ <\/p>\n

<\/p>\n

[root@sound fragrouter-1.6]# .\/fragrouter -B1 <\/p>\n

fragrouter: base-1: normal IP forwarding<\/p>\n

<\/p>\n

\u73b0\u5728\u5c31\u53ef\u4ee5\u5b9e\u73b0\u5728\u4ea4\u6362\u5c40\u57df\u7f51\u4e2d\u55c5\u63a2\u7684\u76ee\u6807.\u5f53\u7136\u4e0a\u9762\u8fd9\u4e9b\u53ea\u662f\u4e00\u4e9b\u539f\u7406\u6027\u7684\u4ecb\u7ecd,\u5728\u771f\u6b63\u7684\u4f7f\u7528\u4e2d\u4f1a\u9047\u5230\u5f88\u591a\u7684\u95ee\u9898,\u6bd4\u5982\u5982\u4f55\u5b9e\u73b0\u5bf9\u7f51\u5173A\u548c\u4e3b\u673aC\u7684\u6b3a\u9a97,\u4ee5\u53ca\u5982\u4f55\u5904\u7406\u53ef\u80fd\u51fa\u73b0\u7684\u5e7f\u64ad\u98ce\u66b4\u95ee\u9898,\u8fd9\u4e9b\u53ef\u4ee5\u5728\u5b9e\u8df5\u4e2d\u5b66\u4e60.\u8fd8\u6709\u4e00\u4e2a\u53ebarpsniff\u7684\u5de5\u5177\u80fd\u591f\u5f88\u65b9\u4fbf\u7684\u5b8c\u6210\u8fd9\u4e00\u529f\u80fd,\u5f88\u591a\u7f51\u7ad9\u90fd\u63d0\u4f9b\u4e0b\u8f7d,\u754c\u9762\u6bd4\u8f83\u53cb\u597d,\u7531\u4e8e\u548c\u4e0a\u9762\u7684\u539f\u7406\u4e00\u6837,\u53ea\u662f\u5de5\u5177\u4f7f\u7528\u4e0a\u7684\u4e0d\u540c\u5e76\u4e14\u6dfb\u52a0\u4e86\u4e00\u4e9b\u9644\u52a0\u7684\u529f\u80fd,\u6240\u4ee5\u8fd9\u91cc\u4e0d\u5728\u8fdb\u884c\u4ecb\u7ecd.<\/p>\n

<\/p>\n

\u4ee3\u7406ARP\u7684\u53e6\u5916\u4e00\u4e2a\u5e94\u7528\u5c31\u662f\u9632\u706b\u5899\u7684\u900f\u660e\u4ee3\u7406\u7684\u5b9e\u73b0.\u6211\u4eec\u90fd\u77e5\u9053\u65e9\u671f\u7684\u9632\u706b\u5899\u5927\u90fd\u662f\u57fa\u4e8e\u8def\u7531\u6a21\u5f0f,\u4e5f\u5c31\u662f\u9632\u706b\u5899\u8981\u5b8c\u6210\u4e00\u4e2a\u8def\u7531\u7684\u4f5c\u7528.\u8fd9\u79cd\u63a5\u5165\u65b9\u5f0f\u9700\u8981\u5728\u5c40\u57df\u7f51\u5185\u7684\u4e3b\u673a\u4e0a\u8bbe\u7f6e\u9632\u706b\u5899\u7684IP\u4e3a\u4ee3\u7406,\u800c\u4e14\u9700\u8981\u5728\u5916\u90e8\u8def\u7531\u5668\u7684\u8def\u7531\u8868\u4e2d\u52a0\u5165\u4e00\u6761\u6307\u5411\u9632\u706b\u5899\u7684\u8def\u7531.\u8fd9\u79cd\u65b9\u5f0f\u7684\u7f3a\u70b9\u5728\u4e8e\u4e0d\u900f\u660e,\u9700\u8981\u8fdb\u884c\u8fc7\u591a\u7684\u8bbe\u7f6e,\u5e76\u4e14\u7834\u574f\u4e86\u539f\u6709\u7684\u7f51\u7edc\u62d3\u6251.\u6240\u4ee5\u73b0\u5728\u51e0\u4e4e\u5168\u90e8\u7684\u9632\u706b\u5899\u90fd\u5b9e\u73b0\u4e86\u4e00\u79cd\u900f\u660e\u63a5\u5165\u7684\u529f\u80fd,\u7528\u6237\u7684\u8def\u7531\u5668\u548c\u5ba2\u6237\u7aef\u4e0d\u7528\u505a\u4efb\u4f55\u4fee\u6539,\u7528\u6237\u751a\u81f3\u611f\u89c9\u4e0d\u5230\u900f\u660e\u63a5\u5165\u65b9\u5f0f\u9632\u706b\u5899\u7684\u5b58\u5728.\u8fd9\u79cd\u900f\u660e\u63a5\u5165\u7684\u539f\u7406\u5c31\u662fARP\u4ee3\u7406.<\/p>\n

<\/p>\n

\u6211\u4eec\u73b0\u5728\u770b\u5982\u4f55\u914d\u7f6e\u4e00\u53f0\u4e3b\u673a\u4f5c\u4e3a\u900f\u660e\u63a5\u5165\u6a21\u5f0f\u7684\u9632\u706b\u5899(\u900f\u660e\u63a5\u5165\u7684\u9632\u706b\u5899\u4e0d\u9700\u8981IP),<\/p>\n

<\/p>\n

<\/p>\n

\u56fe5 <\/p>\n

<\/p>\n

\u5982\u56fe5\u6240\u793a,\u4e00\u53f0\u9632\u706b\u5899\u8fde\u63a5\u5185\u90e8\u7f51\u6bb5\u548cDMZ\u7f51\u6bb5\u5230\u5916\u90e8\u8def\u7531.\u6211\u4eec\u5728\u8fd9\u53f0\u7528\u4f5c\u9632\u706b\u5899\u7684\u4e3b\u673a\u4e0a\u4f7f\u7528linux\u64cd\u4f5c\u7cfb\u7edf,\u8fd9\u6837\u6211\u4eec\u53ef\u4ee5\u65b9\u4fbf\u7684\u4f7f\u7528iptables\u9632\u706b\u5899.\u5047\u8bbe\u4e09\u5757\u7f51\u5361\u4e3aeth0,eth1\u548ceth2,eth0\u548c\u8def\u7531\u5668\u76f8\u8fde,eth1\u548c\u5185\u7f51\u76f8\u8fde.eth2\u548c\u5916\u7f51\u76f8\u8fde.\u5047\u8bbeDMZ\u533a\u67092\u53f0\u670d\u52a1\u5668.<\/p>\n

<\/p>\n

\u5185\u7f51\u5730\u5740:192.168.1.0\/24<\/p>\n

DMZ\u5730\u5740:192.168.1.2—192.168.1.3<\/p>\n

\u8def\u7531\u5668\u7684ip\u5730\u5740:192.168.1.1<\/p>\n

eth0:AA:AA:AA:AA:AA:AA<\/p>\n

eth1:BB:BB:BB:BB:BB:BB<\/p>\n

eth2:CC:CC:CC:CC:CC:CC<\/p>\n

<\/p>\n

\u548c\u524d\u9762\u5dee\u4e0d\u591a,\u7b2c\u4e00\u6b65\u9700\u8981\u5b9e\u73b0ARP\u6b3a\u9a97,\u8fd9\u6b21\u6211\u4eec\u6709\u4e2a\u7b80\u5355\u7684\u5b9e\u73b0.\u6211\u4eec\u628a\u8def\u7531\u5668\u7684IP\u5730\u5740\u548c\u9632\u706b\u5899\u7684eth1\u548ceth2\u7684\u7f51\u5361\u7269\u7406\u5730\u5740\u7ed1\u5b9a,\u5c06\u5185\u7f51\u548cDMZ\u7f51\u6bb5\u7684IP\u5730\u5740\u548ceth0\u7684\u7f51\u5361\u7ed1\u5b9a,\u5728linux\u7cfb\u7edf\u4e0a\u6211\u4eec\u7528arp\u547d\u4ee4\u5b9e\u73b0:<\/p>\n

<\/p>\n

arp -s 192.168.1.1 BB:BB:BB:BB:BB:BB<\/p>\n

arp -s 192.168.1.1 CC:CC:CC:CC:CC:CC <\/p>\n

arp -s 192.168.1.0\/24 AA:AA:AA:AA:AA:AA<\/p>\n

<\/p>\n

\u7b2c\u4e8c\u90e8\u6211\u4eec\u9700\u8981\u5728\u57fa\u4e8elinux\u7684\u9632\u706b\u5899\u4e0a\u8bbe\u7f6e\u8def\u7531,\u628a\u76ee\u6807\u5730\u5740\u662f\u5916\u90e8\u8def\u7531\u7684\u5305\u8f6c\u53d1\u5230eth0,\u628a\u76ee\u6807\u5730\u5740\u4e3a\u5185\u7f51\u7684\u5305\u8f6c\u53d1\u5230eth1,\u628a\u76ee\u6807\u5730\u5740\u662fDMZ\u7f51\u6bb5\u670d\u52a1\u5668\u7684\u5305\u8f6c\u53d1\u5230eth2.\u5728linux\u4e0b\u9762\u7528route\u547d\u4ee4\u5b9e\u73b0<\/p>\n

<\/p>\n

route add 192.168.1.1 dev eth0<\/p>\n

route add -net 192.168.1.0\/24 dev eth1<\/p>\n

route add 192.168.1.2 dev eth2<\/p>\n

route add 192.168.1.3 dev eth3 <\/p>\n

<\/p>\n

(\u9488\u5bf9DMZ\u7f51\u6bb5\u91cc\u9762\u7684\u6bcf\u53f0\u670d\u52a1\u5668\u90fd\u8981\u589e\u52a0\u4e00\u6761\u5355\u72ec\u7684\u8def\u7531) \u73b0\u5728\u6211\u4eec\u5c31\u5df2\u7ecf\u5b9e\u73b0\u4e86\u4e00\u4e2a\u7b80\u5355\u7684arp\u4ee3\u7406\u7684\u900f\u660e\u63a5\u5165,\u5f53\u7136\u5bf9\u5e94\u4e8e\u9632\u706b\u5899\u7684iptables\u90e8\u5206\u8981\u53e6\u5916\u914d\u7f6e,iptables\u7684\u914d\u7f6e\u4e0d\u5728\u672c\u6587\u8303\u7574\u4e4b\u5185.<\/p>\n

<\/p>\n

\u5c0f\u7ed3<\/p>\n

<\/p>\n

\u672c\u6587\u4ecb\u7ecd\u4e86ARP\u534f\u8bae\u4ee5\u53ca\u4e0e\u5176\u76f8\u5173\u7684\u5b89\u5168\u95ee\u9898\u3002\u4e00\u4e2a\u91cd\u8981\u7684\u5b89\u5168\u95ee\u9898\u5c31\u662fARP\u6b3a\u9a97\uff0c\u6211\u4eec\u8bb2\u5230\u4e86\u540c\u4e00\u7f51\u6bb5\u7684ARP\u6b3a\u9a97\u4ee5\u53ca\u8de8\u7f51\u6bb5\u7684ARP\u6b3a\u9a97\u548cICMP\u91cd\u5b9a\u5411\u76f8\u7ed3\u5408\u7684\u65b9\u6cd5\u3002\u7531\u4e8e\u6709\u8fd9\u4e9b\u5b89\u5168\u95ee\u9898\u7684\u5b58\u5728\uff0c\u6211\u4eec\u7ed9\u51fa\u4e00\u4e9b\u6700\u57fa\u672c\u7684\u89e3\u51b3\u529e\u6cd5\u3002\u6700\u540e\u8c08\u5230\u4e86\u5229\u7528\u4ee3\u7406ARP\u5b9e\u73b0\u5728\u4ea4\u6362\u7f51\u7edc\u4e2d\u55c5\u63a2\u548c\u9632\u706b\u5899\u7684\u900f\u660e\u63a5\u5165\u3002<\/p>\n

<\/p>\n

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