ppp-howto-12.html

这份文件展示如何把你的 Linux PC 连接到一台 PPP 伺服器上

# This requires TWO WAY authentication - do NOT use this for a standard
# PAP authenticated link to an ISP as this will require the ISP machine
# to authenticate itself to your machine (and it will not be able to).
#+pap

# Don't agree to authenticate using PAP.
#-pap

# Require the peer to authenticate itself using CHAP [Cryptographic
# Handshake Authentication Protocol] authentication.
# This requires TWO WAY authentication - do NOT use this for a standard
# CHAP authenticated link to an ISP as this will require the ISP machine
# to authenticate itself to your machine (and it will not be able to).
#+chap

# Don't agree to authenticate using CHAP.
#-chap

# Disable negotiation of Van Jacobson style IP header compression (use
# default, i.e. no compression).
#-vj

# Increase debugging level (same as -d).  If this option is given, pppd
# will log the contents of all control packets sent or received in a
# readable form.  The packets are logged through syslog with facility
# daemon and level debug. This information can be directed to a file by
# setting up /etc/syslog.conf appropriately (see syslog.conf(5)).  (If
# pppd is compiled with extra debugging enabled, it will log messages
# using facility local2 instead of daemon).
#debug

# Append the domain name <d> to the local host name for authentication
# purposes.  For example, if gethostname() returns the name porsche,
# but the fully qualified domain name is porsche.Quotron.COM, you would
# use the domain option to set the domain name to Quotron.COM.
#domain <d>

# 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

# Set the MTU [Maximum Transmit Unit] value to <n>. 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.
#mtu <n>

# Set the name of the local system for authentication purposes to <n>.
# This will probably have to be set to your ISP user name if you are
# using PAP/CHAP.
#name <n>

# Set the user name to use for authenticating this machine with the peer
# using PAP to <u>.
# Do NOT use this if you are using 'name' above!
#user <u>

# Enforce the use of the host name as the name of the local system for
# authentication purposes (overrides the name option).
#usehostname

# Set the assumed name of the remote system for authentication purposes
# to <n>.
#remotename <n>

# Add an entry to this system's ARP [Address Resolution Protocol]
# table with the IP address of the peer and the Ethernet address of this
# system.
#proxyarp

# Use the system password database for authenticating the peer using
# PAP.
#login

# 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 <n>

# If this option is given, pppd will presume the peer to be dead if n
# LCP echo-requests are sent without receiving a valid LCP echo-reply.
# If this happens, pppd will terminate the connection.  Use of this
# option requires a non-zero value for the lcp-echo-interval parameter.
# This option can be used to enable pppd to terminate after the physical
# connection has been broken (e.g., the modem has hung up) in
# situations where no hardware modem control lines are available.
#lcp-echo-failure <n>

# Set the LCP restart interval (retransmission timeout) to <n> seconds
# (default 3).
#lcp-restart <n>

# Set the maximum number of LCP terminate-request transmissions to <n>
# (default 3).
#lcp-max-terminate <n>

# Set the maximum number of LCP configure-request transmissions to <n>
# (default 10).
# Some PPP servers are slow to start up. You may need to increase this
# if you keep getting 'serial line looped back' errors and your are SURE
# that you have logged in correctly and PPP should be starting on the server.
#lcp-max-configure <n>

# Set the maximum number of LCP configure-NAKs returned before starting
# to send configure-Rejects instead to <n> (default 10).
#lcp-max-failure <n>

# Set the IPCP restart interval (retransmission timeout) to <n>
# seconds (default 3).
#ipcp-restart <n>

# Set the maximum number of IPCP terminate-request transmissions to <n>
# (default 3).
#ipcp-max-terminate <n>

# Set the maximum number of IPCP configure-request transmissions to <n>
# (default 10).
#ipcp-max-configure <n>

# Set the maximum number of IPCP configure-NAKs returned before starting
# to send configure-Rejects instead to <n> (default 10).
#ipcp-max-failure <n>

# Set the PAP restart interval (retransmission timeout) to <n> seconds
# (default 3).
#pap-restart <n>

# Set the maximum number of PAP authenticate-request transmissions to
# <n> (default 10).
#pap-max-authreq <n>

# Set the CHAP restart interval (retransmission timeout for
# challenges) to <n> seconds (default 3).
#chap-restart <n>

# Set the maximum number of CHAP challenge transmissions to <n>
# (default 10).
#chap-max-challenge

# If this option is given, pppd will re-challenge the peer every <n>
# seconds.
#chap-interval <n>

# 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
</PRE>
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<P>
<H2><A NAME="ss12.2">12.2 我应该使用什麽选项? (无 PAP/CHAP)</A>
</H2>

<P>嗯，完全视情况而定（唉）．这里所提供的应该适用於大部份的伺服器．
<P>
<P>然而，如果它无法运作的话，阅读样板档(<CODE>/etc/ppp/options.tpl</CODE>) <B>以及</B> pppd 的线上使用手册<B>并且</B>告诉你所连线之伺服器的系统管理／使用者支援人员．
<P>
<P>你还应该注意这里所展示的连结指令稿也使用了一些给 pppd 的命令列选项以便让事情容易调整些．
<P>
<HR>
<PRE>
# /etc/ppp/options (NO PAP/CHAP)
#
# 避免 pppd 进入背景执行
-detach
#
# 使用数据机控制线
modem
# 使用 uucp 形态的锁定档以避免它人取用串列装置
lock
# 使用硬体流量控制
crtscts
# 在递送表格中将此连结建立为预设递送装置
defaultroute
# 不使用任何"逸出"控制序列
asyncmap 0
# 最大传送封包大小为 552 bytes
mtu 552
# 最大接收封包大小为 552 bytes
mru 552
#
#-------END OF SAMPLE /etc/ppp/options (no PAP/CHAP)
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