关于pppoe（adsl）拨号上网的解决方法

我今天回家发现电脑XP系统崩溃了，幸好有我的puppy，U盘插上，重启机器，OK，
但是尝试了半天也无法上网，
我的系统版本是4.0 安装了中文扩展包的，
我首先按照PPPOE管理工具的设置，做了一遍，输入了账号，密码，端口，在选择DNS的时候，工具提示说，输入server是系统默认的从网络isp那里获得dns，如果直接回车的话，那么系统就认为你懂得设置dns，就会乎略，同时它提到软件存在一个bug，就是输入server有时不管用，那么就要从新设置向导，选择直接回车。
我首先输入server 试了试，能链接成功，但是打不开网页，为了排除其他原因，我使用了一个我知道的网站做了测试，网址是http://218.207.67.66 幸好我知道ip地址，我输入这个地址后，网页上返回了 it works ，这就说明网络是通的，但是输入www.sohu.com 却显示未找到服务器。于是可以判断出是dns出了问题。
我有做了一遍配置，这次在dns这里 直接回车，试了一下，还是不行。
接下来我又通过命令ifconfig 显示网络的ip地址，我是希望找到dns该如何输入，我找了半天，也没有找到一个可以输入dns的命令。
后来我想起我还有一本linux命令查询词典，查阅了一遍，也找不到一个于DNS有关的命令，最后在附录上发现了一些系统的重要的配置文件，看了一下，突然想到，在linux下，设备的一些地址配置是一个叫做conf扩展名的文件保存的，我看了下这些文件的保存目录，是在etc下，于是我就到puppy的etc下找看看有没有pppoe相关的，
结果找到一个ppp的文件夹，在里面有个pppoe.conf文件和conf.bak文件，显然就是它了，我打开找了一下，发现了这个文件确实是当前的pppoe文件配置，因为我在里面找到了我输入的adsl账号。
继续向下找，找到一个dns的关键字，就是它了，一共有两个，dns1 dns2 在后面加上我知道的dns地址，保存，退出，连接pppoe看看咋样。
测试一下，靠，还是上不去！！！
这个怎么办，莫非是DNS地址输入错了，我输的单位的dns单位用的是移动的专线，家里面是铁通的，怎么办，换dns，打电话，找铁通，结果告诉我两个，一主一备，都输上，保存，退出，拨号连接，打开firefox，输入www.sohu.com等待，显示页面载入出错，Firefox 无法在 www.sohu.com 找到该服务器。 靠，再次失败。
继续找问题，我这次开始研究这个文件，在dns关键字的上方，发现一段话：
# DNS type: SERVER=obtain from server; SPECIFY=use DNS1 and DNS2;
# NOCHANGE=do not adjust.
DNSTYPE=NOCHANGE
看来问题出在这里了，虽然我在下面输入了dns，但是，因为这个dnstype选项没有选对，导致系统没有使用dns1和dns2.
修改 DNSTYPE=SPECIFY
再次测试网络，hohoo！ 久违的搜狐的页面就打开喽。爽！！！
-----------------------------
如果你也和我遇到一样的问题，可以试试这个方法，
在使用pppoe配置工具的时候，dns那一项直接回车
然后在修改DNSTYPE=SPECIFY
然后输入
DNS1=61.232.206.102
DNS2=211.98.4.1
保存文件，再播一次试试看，
我提供给大家几个dns
211.138.13.66 移动
211.143.60.56 移动
61.232.206.102 铁通
211.98.4.1 铁通
-------------------------------------
下面是我的pppoe.conf文件


-----
#***********************************************************************
#
# pppoe.conf
#
# Configuration file for rp-pppoe. Edit as appropriate and install in
# /etc/ppp/pppoe.conf
#
# NOTE: This file is used by the pppoe-start, pppoe-stop, pppoe-connect and
# pppoe-status shell scripts. It is *not* used in any way by the
# "pppoe" executable.
#
# Copyright (C) 2000 Roaring Penguin Software Inc.
#
# This file may be distributed under the terms of the GNU General
# Public License.
#
# LIC: GPL
# $Id: pppoe.conf,v 1.11 2005/08/09 02:49:12 dfs Exp $
#***********************************************************************

# When you configure a variable, DO NOT leave spaces around the "=" sign.

# Ethernet card connected to DSL modem
ETH='eth0'

# PPPoE user name. You may have to supply "@provider.com" Sympatico
# users in Canada do need to include "@sympatico.ca"
# Sympatico uses PAP authentication. Make sure /etc/ppp/pap-secrets
# contains the right username/password combination.
# For Magma, use
USER='×××××××'

# Bring link up on demand? Default is to leave link up all the time.
# If you want the link to come up on demand, set DEMAND to a number indicating
# the idle time after which the link is brought down.
DEMAND=no
#DEMAND=300

# DNS type: SERVER=obtain from server; SPECIFY=use DNS1 and DNS2;
# NOCHANGE=do not adjust.
DNSTYPE=SPECIFY

# Obtain DNS server addresses from the peer (recent versions of pppd only)
# In old config files, this used to be called USEPEERDNS. Changed to
# PEERDNS for better Red Hat compatibility
PEERDNS=no

DNS1=61.232.206.102
DNS2=211.98.4.1

# Make the PPPoE connection your default route. Set to
# DEFAULTROUTE=no if you don't want this.
DEFAULTROUTE=yes

### ONLY TOUCH THE FOLLOWING SETTINGS IF YOU'RE AN EXPERT

# How long pppoe-start waits for a new PPP interface to appear before
# concluding something went wrong. If you use 0, then pppoe-start
# exits immediately with a successful status and does not wait for the
# link to come up. Time is in seconds.
#
# WARNING WARNING WARNING:
#
# If you are using rp-pppoe on a physically-inaccessible host, set
# CONNECT_TIMEOUT to 0. This makes SURE that the machine keeps trying
# to connect forever after pppoe-start is called. Otherwise, it will
# give out after CONNECT_TIMEOUT seconds and will not attempt to
# connect again, making it impossible to reach.
CONNECT_TIMEOUT=30

# How often in seconds pppoe-start polls to check if link is up
CONNECT_POLL=2

# Specific desired AC Name
ACNAME=

# Specific desired service name
SERVICENAME=

# Character to echo at each poll. Use PING="" if you don't want
# anything echoed
PING="."

# File where the pppoe-connect script writes its process-ID.
# Three files are actually used:
# $PIDFILE contains PID of pppoe-connect script
# $PIDFILE.pppoe contains PID of pppoe process
# $PIDFILE.pppd contains PID of pppd process
CF_BASE=`basename $CONFIG`
PIDFILE="/var/run/$CF_BASE-pppoe.pid"

# Do you want to use synchronous PPP? "yes" or "no". "yes" is much
# easier on CPU usage, but may not work for you. It is safer to use
# "no", but you may want to experiment with "yes". "yes" is generally
# safe on Linux machines with the n_hdlc line discipline; unsafe on others.
SYNCHRONOUS=no

# Do you want to clamp the MSS? Here's how to decide:
# - If you have only a SINGLE computer connected to the DSL modem, choose
# "no".
# - If you have a computer acting as a gateway for a LAN, choose "1412".
# The setting of 1412 is safe for either setup, but uses slightly more
# CPU power.
CLAMPMSS=1412
#CLAMPMSS=no

# LCP echo interval and failure count.
LCP_INTERVAL=20
LCP_FAILURE=3

# PPPOE_TIMEOUT should be about 4*LCP_INTERVAL
PPPOE_TIMEOUT=80

# Firewalling: One of NONE, STANDALONE or MASQUERADE
FIREWALL=NONE

# Linux kernel-mode plugin for pppd. If you want to try the kernel-mode
# plugin, use LINUX_PLUGIN=/etc/ppp/plugins/rp-pppoe.so
LINUX_PLUGIN=

# Any extra arguments to pass to pppoe. Normally, use a blank string
# like this:
PPPOE_EXTRA=""

# Rumour has it that "Citizen's Communications" with a 3Com
# HomeConnect DSL Modem DualLink requires these extra options:
# PPPOE_EXTRA="-f 3c12:3c13 -S ISP"

# Any extra arguments to pass to pppd. Normally, use a blank string
# like this:
PPPD_EXTRA=""


########## DON'T CHANGE BELOW UNLESS YOU KNOW WHAT YOU ARE DOING
# If you wish to COMPLETELY overrride the pppd invocation:
# Example:
# OVERRIDE_PPPD_COMMAND="pppd call dsl"

# If you want pppoe-connect to exit when connection drops:
# RETRY_ON_FAILURE=no