前兩天fish在QQ群上問，為什么我上網(wǎng)易聊天室(chat.163.com)總是跑到139cn.com這個網(wǎng)站上去？一開始我以為是他們DNS解析錯誤，或者被人修改了，后來仔細一問并不是那么回事。fish也是一個比較懂得計算機的人，一般病毒應(yīng)該能找到注冊表或者進程什么的問題，但是卻沒發(fā)現(xiàn)，用3721助手也不好使，看樣子不是修改了IE的問題。那么，能將域名轉(zhuǎn)到其他頁面問題又在哪里呢？icech想到了windows 2000下面的Hosts文件（在WindowsXP系統(tǒng)里面也有）！

　　當(dāng)用戶在瀏覽器中輸入某個網(wǎng)站的域名之后，計算機并不像我們所想象的那樣直接連接到Internet上的域名服務(wù)器進行解析，它首先會在硬盤中的hosts文件中進行查找，若找不到相應(yīng)域名才會向Internet上的域名服務(wù)器申請解析，若找到相應(yīng)的域名，系統(tǒng)就會直接按照hosts文件的設(shè)置將域名轉(zhuǎn)換為IP地址并進行訪問。由此可見，hosts文件實際上就相當(dāng)于一個本地的DNS域名服務(wù)器。

　　那么難道是修改了Hosts文件？先找到Hosts文件（Windows 2000下的路徑是：C:\WINNT\system32\drivers\etc；Windows XP下的路徑是C:\WINDOWS\system32\drivers\etc\hosts），打開一看，天吶，竟然被修改成如下的樣子：

　　被病毒修改的Hosts文件內(nèi)容：

127.0.0.1 localhost
219.129.20.148 bliao.com
219.129.20.148 asiafriendfinder.com
219.129.20.148 www.hao123.com
219.129.20.148 hao123.com
219.129.20.148 hao123.net
219.129.20.148 www.hao123.net
219.129.20.148 www.hao222.net
219.129.20.148 www.hao222.com
219.129.20.148 www.v111.com
219.129.20.148 music.v111.com
219.129.20.148 goto.17173.com
219.129.20.148 www.xicu.com
219.129.20.148 www.haodx.com
219.129.20.148 www.haohz.com
219.129.20.148 www.265.com
219.129.20.148 www.dj99.com
219.129.20.148 www.dj99.net
219.129.20.148 265.com
219.129.20.148 stat.t2t2.com
219.129.20.148 www.qq530.com
219.129.20.148 www.tt67.com
219.129.20.148 ad.t2t2.com
219.129.20.148 www.yexr.com
219.129.20.148 link.fan8.net
219.129.20.148 www.ok816.com
219.129.20.148 www.3399.net
219.129.20.148 www.ads8.com
219.129.20.148 www.5566.net
219.129.20.148 www.t2t2.com
219.129.20.148 popad.qq.com
219.129.20.148 v.jsdownload.com
219.129.20.148 www.linktoad.com
219.129.20.148 www.caishow.com
219.129.20.148 sms1.ctn.com.cn
219.129.20.148 sms2.ctn.com.cn
219.129.20.148 sms3.ctn.com.cn
219.129.20.148 www.331122.com
219.129.20.148 mmpic.uni.cc
219.129.20.148 www.love34.com
219.129.20.148 www.free-movie.org
219.129.20.148 www.skyhits.com
219.129.20.148 www.rd18.com
219.129.20.148 tadsweb.tencent.com
219.129.20.148 www.vlike.com
219.129.20.148 www.chinasee.net
219.129.20.148 www.japansky.net
219.129.20.148 www.225.com.cn
219.129.20.148 ads.china.com
219.129.20.148 www.yes521.com
219.129.20.148 www.today6.com
219.129.20.148 www.h2004.com
219.129.20.148 www.movie4.com
219.129.20.148 www.rm88.com
219.129.20.148 www.qq300.com
219.129.20.148 www.qq500.com
219.129.20.148 www.av126.com
219.129.20.148 www.kissmm.com
219.129.20.148 www.cn808.net
219.129.20.148 www.hao168.com
219.129.20.148 www.mm91.com
219.129.20.148 www.huole.com
219.129.20.148 www.kan69.com
219.129.20.148 ulinkdir.tom.com
219.129.20.148 cpc.sohu.com
219.129.20.148 images.sohu.com
219.129.20.148 adv.pconline.com.cn
219.129.20.148 goto.sohu.com
219.129.20.148 images2.sohu.com
219.129.20.148 www.sexy-books.com
219.129.20.148 www.xxbooks.com
219.129.20.148 www.18it.com
219.129.20.148 www.cnxxx.com
219.129.20.148 www.18-girl.net
219.129.20.148 ad.tom.com
219.129.20.148 ad4.sina.com.cn
219.129.20.148 sina.allyes.com
219.129.20.148 adtaobao.allyes.com
219.129.20.148 smarttrade.allyes.com
219.129.20.148 tom.allyes.com
219.129.20.148 szwindow.allyes.com
219.129.20.148 eachnetmember.allyes.com
219.129.20.148 iplus.allyes.com
219.129.20.148 sinatest.allyes.com
219.129.20.148 casting9.allyes.com
219.129.20.148 yinsha.allyes.com
219.129.20.148 stockstar.allyes.com
219.129.20.148 www.001x.com
219.129.20.148 www.hksexweb.com
219.129.20.148 www.99adultx.com
219.129.20.148 www2.xfreehosting.com
219.129.20.148 www1.xfreehosting.com
219.129.20.148 www.w555.net
219.129.20.148 www.excitecity.com
219.129.20.148 www.0xing.com
219.129.20.148 sba.3322.net
219.129.20.148 www.zgxl.net
219.129.20.148 www.qqpic.com
219.129.20.148 webspacecn.com
219.129.20.148 www.yeapple.com
219.129.20.148 manage.link8.com
219.129.20.148 www.web888.org
219.129.20.148 www.432.cn
219.129.20.148 www.kan123.com
219.129.20.148 www.3tom.com
219.129.20.148 www.sotop.com
219.129.20.148 www3.7789.com
219.129.20.148 www.66036.com
219.129.20.148 www1.66036.com
219.129.20.148 www2.66036.com
219.129.20.148 www3.66036.com
219.129.20.148 www4.66036.com
219.129.20.148 www5.66036.com
219.129.20.148 www6.66036.com
219.129.20.148 www7.66036.com
219.129.20.148 www8.66036.com
219.129.20.148 www9.66036.com
219.129.20.148 www10.66036.com
219.129.20.148 tj4.7789.com
219.129.20.148 tj5.7789.com
219.129.20.148 tj6.7789.com
219.129.20.148 tj7.7789.com
219.129.20.148 www.7789.com
219.129.20.148 count.zhao123.com
219.129.20.148 count1.zhao123.com
219.129.20.148 count2.zhao123.com
219.129.20.148 count3.zhao123.com
219.129.20.148 count4.zhaocount.com
219.129.20.148 count5.zhaocount.com
219.129.20.148 count6.zhaocount.com
219.129.20.148 count7.zhaocount.com
219.129.20.148 count8.zhaocount.com
219.129.20.148 count9.zhaocount.com
219.129.20.148 count10.zhaocount.com
219.129.20.148 count11.zhaocount.com
219.129.20.148 tj1.mytongji.com
219.129.20.148 count1.99count.com
219.129.20.148 www.99count.com
219.129.20.148 bar.baidu.com
219.129.20.148 www2.7789.com
219.129.20.148 www.guang.org
219.129.20.148 www.dlmovie.com
219.129.20.148 www.91look.com
219.129.20.148 www.kan51.com
219.129.20.148 www.mewo.com
219.129.20.148 coolsite21.com
219.129.20.148 www.t3j4.com
219.129.20.148 www.yun8.com
219.129.20.148 film.yun8.com
219.129.20.148 www.wo123.com
219.129.20.148 www.da123.com
219.129.20.148 www.huole.com
219.129.20.148 www.1ya.cn
219.129.20.148 www.sleazydream.com
219.129.20.148 www.easypic2.com
219.129.20.148 serv.sexushost.com
219.129.20.148 www.xfreehosting.com
219.129.20.148 www.888txt.com
219.129.20.148 asiafriendfinder.com
219.129.20.148 www3.cool168.com
219.129.20.148 www2.cool168.com
219.129.20.148 www1.cool168.com
219.129.20.148 www.happy8.cn
219.129.20.148 www.topsex2k.com
219.129.20.148 topxxx.sexushost.com
219.129.20.148 www.cool168.com
219.129.20.148 www.s6.cn
219.129.20.148 popme.163.com
219.129.20.148 adclient.163.com
219.129.20.148 fadama.com
219.129.20.148 www.66vv.com
219.129.20.148 www.qqee.com
219.129.20.148 www.sohu123.com
219.129.20.148 www.xgmm.com
219.129.20.148 www.7t7t.com
219.129.20.148 www.cnimg.com
219.129.20.148 www.love34.com
219.129.20.148 cdn2.cnnic.cn
219.129.20.148 cool.vv66.com
219.129.20.148 www.vv66.com
219.129.20.148 www.freepicturepage.com
219.129.20.148 www.snasty.com
219.129.20.148 www.yourcage.com
219.129.20.148 www.shagadelic.com
219.129.20.148 xxxnite.com
219.129.20.148 www.qq163.com
219.129.20.148 www.qq163.net
219.129.20.148 www.superdown.com
219.129.20.148 web.114.com.cn
219.129.20.148 www.114.com.cn
219.129.20.148 www.real2000.org
219.129.20.148 www.91f.cn
219.129.20.148 wwww.tthao.com
219.129.20.148 www.91f.org
219.129.20.148 www.v23.com
219.129.20.148 cn.yimg.com
219.129.20.148 auto.search.msn.com
219.129.20.148 x2.51link.com
219.129.20.148 x1.51link.com
219.129.20.148 www.textlink.cn
219.129.20.148 stat.textclick.com
219.129.20.148 www.easyhere.com
219.129.20.148 www.xxx168.com
219.129.20.148 ad.cn.doubleclick.net
219.129.20.148 www.xchina.com
219.129.20.148 www.sex.com
219.129.20.148 www.3xcn.com
219.129.20.148 www.20girl.com
219.129.20.148 www.x365x.com
219.129.20.148 chat.263.net
219.129.20.148 chat.yinsha.com
219.129.20.148 chat.tom.com
219.129.20.148 chat.xilu.com
219.129.20.148 www.aliao.com
219.129.20.148 chat.163.com
219.129.20.148 www.haoliao.com
219.129.20.148 www.liaoliao.com
219.129.20.148 www.haoliao.net
219.129.20.148 www.haoliao.cn
219.129.20.148 www.qqliao.com
219.129.20.148 qqliao.com
219.129.20.148 www.qliao.com
219.129.20.148 www.loveliao.com
219.129.20.148 www.mmliao.com
219.129.20.148 mmliao.com
219.129.20.148 aliao.com
219.129.20.148 liaoliao.com
219.129.20.148 chat.qq.com
219.129.20.148 vchat.xaonline.com
219.129.20.148 www.loveliao.net
219.129.20.148 loveliao.net
219.129.20.148 www.chinamp3.com
219.129.20.148 www.9sky.com
219.129.20.148 www.sogua.com
219.129.20.148 sogua.com
219.129.20.148 www.99music.net
219.129.20.148 www.yzskdj.com
219.129.20.148 loveliao.com
219.129.20.148 haoliao.com
219.129.20.148 music.feifa.com
219.129.20.148 www.aisex.com
219.129.20.148 www.movie-down.com
219.129.20.148 www2.movie-down.com
219.129.20.148 movie-down.com
219.129.20.148 www.qqchat.cn
219.129.20.148 www.tt90.com
219.129.20.148 mysms.flymms.com
219.129.20.148 www.sjliao.com
219.129.20.148 www.amsterdamsexxx.com

　　可以肯定是Hosts文件搗亂了！可能是139cn.com網(wǎng)站為了提高訪問量，在網(wǎng)站種上了病毒，修改訪問者機器的Hosts文件，以達到一些目的。現(xiàn)在網(wǎng)站這樣的能人太多了，實在是佩服的很很。

　　修改一下，成默認的樣子：

　　正常的Hosts文件內(nèi)容：

# Copyright (c) 1993-1999 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
#
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
#
# For example:
#
#      102.54.94.97     rhino.acme.com          # source server
#       38.25.63.10     x.acme.com              # x client host

127.0.0.1       localhost

　　修改成以上的樣子就沒問題了，順便介紹一下Hosts文件里面標注方式和說明，以便我們在今后用到Hosts文件時了解：

　　在hosts文件中，帶“#”的內(nèi)容均為注釋，只有最后一行“127.0.0.1 localhost”才是真正的域名解釋內(nèi)容，其中l(wèi)ocalhost表示本機的域名，而127.0.0.1則是本地計算機的IP地址，廣大用戶只需將某個網(wǎng)站的IP地址和它所對應(yīng)的域名添加到文件末尾即可達到在本地計算機上對域名進行解析的目的。