以下是我从某个位置运行traceroute时发生的情况：
# traceroute google.com traceroute to google.com (74.125.227.39), 30 hops max, 60 byte packets 1 gateway.local.enactpc.com (10.0.0.1) 0.138 ms 0.101 ms 0.084 ms 2 * * * 3 * * * 4 * * * 5 * * * 6 * * * 7 * * * 8 * * * 9 * * * 10 * * * 11 * * * 12 * * * 13 * * * 14 * * * 15 * * * 16 * * * 17 * * * 18 * * * 19 * * * 20 * * * 21 * * * 22 * * * 23 * * * 24 * * * 25 * * * 26 * * * 27 * * * 28 * * * 29 * * * 30 * * *
绝对没有什么兴趣…
现在，我原本以为这只是地点networking的一个事实。 （我假设他们阻止ping或什么…）
但是，请注意当我使用nmap运行traceroute时发生了什么…
# nmap -sP --traceroute google.com Starting Nmap 5.21 ( http://nmap.org ) at 2012-09-25 22:18 CDT Nmap scan report for google.com (74.125.227.40) Host is up (0.034s latency). Hostname google.com resolves to 11 IPs. Only scanned 74.125.227.40 rDNS record for 74.125.227.40: dfw06s06-in-f8.1e100.net TRACEROUTE (using proto 1/icmp) HOP RTT ADDRESS 1 0.19 ms gateway.local.enactpc.com (10.0.0.1) 2 1.93 ms 99-20-92-1.lightspeed.austtx.sbcglobal.net (99.20.92.1) 3 25.61 ms 99-20-92-2.lightspeed.austtx.sbcglobal.net (99.20.92.2) 4 ... 6 7 23.68 ms 12.83.68.137 8 31.30 ms gar23.dlstx.ip.att.net (12.122.85.73) 9 ... 10 31.82 ms 72.14.233.65 11 32.27 ms 209.85.250.77 12 32.98 ms dfw06s06-in-f8.1e100.net (74.125.227.40) Nmap done: 1 IP address (1 host up) scanned in 3.29 seconds
当使用nmap我比traceroute获得更多的结果，为什么？
请注意，我检查了，目标IP地址的差异是不相关的…
编辑：
$ sudo traceroute -I google.com [sudo] password for XXX: traceroute to google.com (74.125.227.14), 30 hops max, 60 byte packets 1 gateway.local.enactpc.com (10.0.0.1) 0.151 ms 0.132 ms 0.121 ms 2 * * * 3 99-20-92-2.lightspeed.austtx.sbcglobal.net (99.20.92.2) 27.277 ms 27.661 ms 27.666 ms 4 * * * 5 * * * 6 * * * 7 12.83.68.137 (12.83.68.137) 28.446 ms 24.024 ms 24.689 ms 8 gar23.dlstx.ip.att.net (12.122.85.73) 62.576 ms 61.079 ms 38.973 ms 9 * * * 10 72.14.233.65 (72.14.233.65) 32.226 ms 31.343 ms 100.206 ms 11 216.239.47.54 (216.239.47.54) 33.117 ms 31.809 ms 32.469 ms 12 dfw06s03-in-f14.1e100.net (74.125.227.14) 32.307 ms 31.807 ms 32.554 ms
我猜测这是因为traceroute默认使用UDP，而nmap可能使用普通的ICMP（如Windows中的tracert ）。 试试quanta的build议，但使用-I开关，而不是
sudo traceroute -I google.com
尝试这个：
sudo traceroute -T google.com