张振峰

刚使用美国空间恢复博客没两天，博客就不能访问了。百度一下，按照说明在命令行下执行了2条命令，结果如下：

C:\Documents and Settings\阵风>ping www.zhangzhenfeng.com

Pinging www.zhangzhenfeng.com [174.37.172.68] with 32 bytes of data:

Request timed out.
Request timed out.
Request timed out.
Request timed out.

Ping statistics for 174.37.172.68:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

C:\Documents and Settings\阵风>tracert 174.37.172.68

Tracing route to 174.37.172.68-static.reverse.softlayer.com [174.37.172.68]
over a maximum of 30 hops:

1 1 ms <1 ms 2 ms 172.16.0.254
2 3 ms 2 ms 2 ms hn.kd.ny.adsl [218.29.86.161]
3 3 ms 2 ms 2 ms hn.kd.ny.adsl [125.42.110.73]
4 3 ms 4 ms 4 ms pc37.zz.ha.cn [61.168.254.37]
5 * * * Request timed out.
6 * * * Request timed out.
7 * * * Request timed out.
8 * * * Request timed out.
9 * * * Request timed out.
10 * * * Request timed out.
11 * * * Request timed out.
12 * * * Request timed out.
13 * * * Request timed out.
14 * * * Request timed out.
15 * * * Request timed out.
16 * * * Request timed out.
17 * * * Request timed out.
18 * * * Request timed out.
19 * * * Request timed out.
20 * * * Request timed out.
21 * * * Request timed out.
22 * * * Request timed out.
23 * * * Request timed out.
24 * * * Request timed out.
25 * * * Request timed out.
26 * * * Request timed out.
27 * * * Request timed out.
28 * * * Request timed out.
29 * * * Request timed out.
30 * * * Request timed out.

Trace complete.

我用的是郑州联通的网络，上面显示tracert 过程进行到“郑州联通”路由时被终止了。初步确定网站无法访问是因为IP被封。

DreamHost主机可以添加无限网站，我尝试用Fully Hosted方式增加了1.zhangzhenfeng.com，通过查看DNS获知对于IP是69.163.220.144，再在命令行下执行命令“tracert  69.163.220.144”，显示如下：


Tracing route to apache2-grog.pyongyang.dreamhost.com [69.163.220.144]
over a maximum of 30 hops:
1     1 ms     1 ms     1 ms  172.16.0.254
2     2 ms     3 ms     *     hn.ly.kd.adsl [61.163.84.33]
3     *        2 ms     3 ms  pc93.zz.ha.cn [61.168.19.93]
4     4 ms     3 ms     4 ms  pc185.zz.ha.cn [61.168.255.185]
5     4 ms     4 ms     4 ms  hn.kd.smx.adsl [221.13.224.149]
6    55 ms    55 ms    55 ms  219.158.9.245
7    42 ms    42 ms    41 ms  219.158.3.246
8   218 ms   219 ms     *     219.158.29.170
9   282 ms   282 ms   284 ms  219.158.33.210
10   288 ms   288 ms   288 ms  as26347.losangeles.ca.ibone.comcast.net [75.149.
228.206]
11   289 ms   344 ms   287 ms  ip-66-33-201-115.dreamhost.com [66.33.201.115]
12     *      288 ms   289 ms  apache2-grog.pyongyang.dreamhost.com [69.163.220
.144]

Trace complete.

呵呵，运气不错，第一次添加的IP就是可用的。如果运气不好，就多试几次直到找到合适的IP为止。如果1.zhangzhenfeng.com不行，就添加2.zhangzhenfeng.com，3.zhangzhenfeng.com……（添加2.zhangzhenfeng.com时不要删除1.zhangzhenfeng.com，依次类推……因为删除再添加，获得的IP可能与上次相同。）

再从域名列表里找到主域名zhangzhenfeng.com，点击 Web Hosting 列里的 Edit，把它修改成Mirrored，目标是上面的拥有合适IP的子域名1.zhangzhenfeng.com。再查看zhangzhenfeng.com的DNS信息，与1.zhangzhenfeng.com的IP已经相同了。此时再将zhangzhenfeng.com由Mirrored改回Fully Hosted方式——这不会令IP再次改变。而刚才添加的1.zhangzhenfeng.com（2.zhangzhenfeng.com、3.zhangzhenfeng.com等）子域名已经没有利用价值了，可以删了。

一个多月来，网站运行正常，看来这个IP还不错，一直没人拿它做坏事，呵呵。