看到YaST里面有DSL这一项，于是我就设置了，启动机器的时候看到有加载dsl0这一条，但是为何我不能自动联接呢？而且如果eth0设置为DHCP的话，每次检测网卡都要花一点时间，很不爽。于是我就将它设了一个IP，也就是192.168.1.1这样的。但我拨号的时候仍然不通，很奇怪。于是就在YaST的帮助里查找ADSL的帮助，经过一番摸索之后，终于能上网了。于是想写下来与大家分享，高手们别嘲笑小弟的潜薄，只是，我想多少会有人需要这个东西。
我的输入法还是靠大家才搞定的，否则也不能在这里写中文帖子了。
方法如下：
需要修改3个文件的内容，它们都在/etc/ppp目录下面，分别是：
(1) chap-secrets，
# Secrets for authentication using CHAP
# client server secret IP addresses
# OUTBOUND CONNECTIONS
# Here you should add your PPP Login and PPP password to connect to your
# provider via pap. The * means that the entry(login and passoword may be
# used for ANY host you connect to.
# Thus you do not have to worry about the foreign machine name. Just
# replace password with your password.
#hostname * password
# PREDIFINED CONNECTIONS
# These are user and password entries for publically accessible call-by-call
# Internet providers in Germany. If they confict with your config, remove them.
# READ_IN_CALLBYCALL_SECRETS
# INBOUND CONNECTIONS
#client hostname 192.168.1.1 (我的静态 IP 地址找个，你设的什么就是什么，不用抄我的。但是如果你的Local中有机器用了找个地址，那就不能用来这里了。)
your_account@xx.xx(你的帐户) * xxxxxxx(你的密码) 记住中间的 * 可不要给删除了。
pap-secrets 中的设置跟上面完全相同。我就省略了。
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(2)options 找个文件的设置非常重要。以下是全文，还有一小部分都是注解，我就不写上来了。
# /etc/ppp/options
#
# Not every option is listed here, see man pppd for more details.
# This file is read by the pppd,
# it is an error when it is not present.
#
# use the following command to see the active options:
#
# grep -v ^# /etc/ppp/options | grep -v ^$
#
# ------
# The name of this server. Often, the FQDN is used here.
#name
#===================================================================
user your_account@xxx.xx ( 注意前面的user，不要漏掉了，后门接着的就是你前面用的那个。)
#===================================================================
# Enforce the use of the hostname as the name of the local system for
# authentication purposes (overrides the name option).
#usehostname
# If no local IP address is given, pppd will use the first IP address
# that belongs to the local hostname. If "noipdefault" is given, this
# is disabled and the peer will have to supply an IP address.
#noipdefault
# With this option, pppd will accept the peer's idea of our local IP
# address, even if the local IP address was specified in an option.
#ipcp-accept-local
# With this option, pppd will accept the peer's idea of its (remote) IP
# address, even if the remote IP address was specified in an option.
#ipcp-accept-remote
# Run the executable or shell command specified after pppd has terminated
# the link. This script could, for example, issue commands to the modem
# to cause it to hang up if hardware modem control signals were not
# available.
# If mgetty is running, it will reset the modem anyway. So there is no need
# to do it here.
#disconnect "chat -- \d+++\d\c OK ath0 OK"
# Increase debugging level (same as -d). The debug output is written
# to syslog LOG_LOCAL2.
debug
# Enable debugging code in the kernel-level PPP driver. The argument n
# is a number which is the sum of the following values: 1 to enable
# general debug messages, 2 to request that the contents of received
# packets be printed, and 4 to request that the contents of transmitted
# packets be printed.
#kdebug n
# noauth means do not require the peer to authenticate itself, this must
# be set if you want to use pppd to connect to the internet. In this case
# *you* must authenicate yourself to the peer(internet provider), so do
# not disable this setting unless you are the dial-in server which where
# the peer has to autenticate to.
noauth
# Use hardware flow control (i.e. RTS/CTS) to control the flow of data
# on the serial port.
crtscts
# Specifies that pppd should use a UUCP-style lock on the serial device
# to ensure exclusive access to the device.
lock
# Use the modem control lines.(is default)
#modem （将它注释掉，系统默认是打开的）
# The opposite: local
#
# Description:
# Don't use the modem control lines. With this
# option, pppd will ignore the state of the CD (Car??
# rier Detect) signal from the modem and will not
# change the state of the DTR (Data Terminal Ready)
# signal.
#
# You need to disable modem and enable local if you want to connect
# to anoter system without using a modem:
local （加上这个）
# async character map -- 32-bit hex; each bit is a character
# that needs to be escaped for pppd to receive it. 0x00000001
# represents '\x01', and 0x80000000 represents '\x1f'.
# To allow pppd to work over a rlogin/telnet connection, ou should escape
# XON (^Q), XOFF (^S) and ^]: (The peer should use "escape ff".)
#asyncmap 200a0000
asyncmap 0
# needed for some ISDN Terminaladaters, namely ELSA, those seem to have
# problems with asyncmap negotiation, so you can turn off this procedure
# in case your ISDN box has trouble with it, by enabling this option.
# You have to disable the asyncmap option to be sure to have it
# active. If you use wvdial, set the ISDN parameter in /etc/wvdial.conf
# instead.
#default-asyncmap
# Set the MRU [Maximum Receive Unit] value to for negotiation. pppd
# will ask the peer to send packets of no more than bytes. The
# minimum MRU value is 128. The default MRU value is 1500. A value of
# 296 is recommended for slow links (40 bytes for TCP/IP header + 256
# bytes of data). The value 1492 is for DSL connections (PPP Default -
# PPPoE Header: 1500 - 8 = 1492)
mru 1492 （要加上找个）
# Set the MTU [Maximum Transmit Unit] value to . Unless the peer
# requests a smaller value via MRU negotiation, pppd will request that
# the kernel networking code send data packets of no more than n bytes
# through the PPP network interface. The value 1492 is for DSL connections
# (PPP Default - PPPoE Header: 1500 - 8 = 1492)
mtu 1492 （找个也要加上）
# Set the interface netmask to , a 32 bit netmask in "decimal dot"
# notation (e.g. 255.255.255.0).
#netmask 255.255.255.0
# Don't fork to become a background process (otherwise pppd will do so
# if a serial device is specified).
nodetach
# If this option is given, pppd will send an LCP echo-request frame to
# the peer every n seconds. Under Linux, the echo-request is sent when
# no packets have been received from the peer for n seconds. Normally
# the peer should respond to the echo-request by sending an echo-reply.
# This option can be used with the lcp-echo-failure option to detect
# that the peer is no longer connected.
lcp-echo-interval 30
