084.htm

LINUX的操作系统分析文件和使用文件

# represents '\x01', and 0x80000000 represents '\x1f'. <br>
#asyncmap 0 <br>
<br>
# Require the peer to authenticate itself before allowing network <br>
# packets to be sent or received. <br>
#auth <br>
<br>
# Use hardware flow control (i.e. RTS/CTS) to control the flow of data <br>
# on the serial port. <br>
#crtscts <br>
<br>
# Use software flow control (i.e. XON/XOFF) to control the flow of data <br>
# on the serial port. <br>
#xonxoff <br>
<br>
# Add a default route to the system routing tables, using the peer as <br>
# the gateway, when IPCP negotiation is successfully completed. This <br>
# entry is removed when the PPP connection is broken. <br>
#defaultroute <br>
<br>
# Specifies that certain characters should be escaped on transmission <br>
# (regardless of whether the peer requests them to be escaped with its <br>
# async control character map). The characters to be escaped are <br>
# specified as a list of hex numbers separated by commas. Note that <br>
# almost any character can be specified for the escape option, unlike <br>
# the asyncmap option which only allows control characters to be <br>
# specified. The characters which may not be escaped are those with hex <br>
# values 0x20 - 0x3f or 0x5e. <br>
#escape 11,13,ff <br>
<br>
# Don't use the modem control lines. <br>
#local <br>
<br>
# Specifies that pppd should use a UUCP-style lock on the serial device <br>
# to ensure exclusive access to the device. <br>
#lock <br>
<br>
# Use the modem control lines. On Ultrix, this option implies hardware <br>
# flow control, as for the crtscts option. (This option is not fully <br>
# implemented.) <br>
#modem <br>
<br>
# Set the MRU [Maximum Receive Unit] value to &lt;n&gt; for negotiation. pppd <br>
# will ask the peer to send packets of no more than &lt;n&gt; bytes. The <br>
# minimum MRU value is 128. The default MRU value is 1500. A value of <br>
# 296 is recommended for slow links (40 bytes for TCP/IP header + 256 <br>
# bytes of data). <br>
#mru 542 <br>
<br>
# Set the interface netmask to &lt;n&gt;, a 32 bit netmask in &quot;decimal dot&quot; <br>
# notation (e.g. 255.255.255.0). <br>
#netmask 255.255.255.0 <br>
<br>
# Disables the default behaviour when no local IP address is specified, <br>
# which is to determine (if possible) the local IP address from the <br>
# hostname. With this option, the peer will have to supply the local IP <br>
# address during IPCP negotiation (unless it specified explicitly on the <br>
# command line or in an options file). <br>
#noipdefault <br>
<br>
# Enables the &quot;passive&quot; option in the LCP. With this option, pppd will <br>
# attempt to initiate a connection; if no reply is received from the <br>
# peer, pppd will then just wait passively for a valid LCP packet from <br>
# the peer (instead of exiting, as it does without this option). <br>
#passive <br>
<br>
# With this option, pppd will not transmit LCP packets to initiate a <br>
# connection until a valid LCP packet is received from the peer (as for <br>
# the &quot;passive&quot; option with old versions of pppd). <br>
#silent <br>
<br>
# Don't request or allow negotiation of any options for LCP and IPCP <br>
# (use default values). <br>
#-all <br>
<br>
# Disable Address/Control compression negotiation (use default, i.e. <br>
# address/control field disabled). <br>
#-ac <br>
<br>
# Disable asyncmap negotiation (use the default asyncmap, i.e. escape <br>
# all control characters). <br>
#-am <br>
<br>
# Don't fork to become a background process (otherwise pppd will do so <br>
# if a serial device is specified). <br>
#-detach <br>
<br>
# Disable IP address negotiation (with this option, the remote IP <br>
# address must be specified with an option on the command line or in an <br>
# options file). <br>
#-ip <br>
<br>
# Disable magic number negotiation. With this option, pppd cannot <br>
# detect a looped-back line. <br>
#-mn <br>
<br>
# Disable MRU [Maximum Receive Unit] negotiation (use default, i.e. <br>
# 1500). <br>
#-mru <br>
<br>
# Disable protocol field compression negotiation (use default, i.e. <br>
# protocol field compression disabled). <br>
#-pc <br>
<br>
# Require the peer to authenticate itself using PAP. <br>
# This requires TWO WAY authentication - do NOT use this for a standard <br>
# PAP authenticated link to an ISP as this will require the ISP machine <br>
# to authenticate itself to your machine (and it will not be able to). <br>
#+pap <br>
<br>
# Don't agree to authenticate using PAP. <br>
#-pap <br>
<br>
# Require the peer to authenticate itself using CHAP [Cryptographic <br>
# Handshake Authentication Protocol] authentication. <br>
# This requires TWO WAY authentication - do NOT use this for a standard <br>
# CHAP authenticated link to an ISP as this will require the ISP machine <br>
# to authenticate itself to your machine (and it will not be able to). <br>
#+chap <br>
<br>
# Don't agree to authenticate using CHAP. <br>
#-chap <br>
<br>
# Disable negotiation of Van Jacobson style IP header compression (use <br>
# default, i.e. no compression). <br>
#-vj <br>
<br>
# Increase debugging level (same as -d). If this option is given, pppd <br>
# will log the contents of all control packets sent or received in a <br>
# readable form. The packets are logged through syslog with facility <br>
# daemon and level debug. This information can be directed to a file by <br>
# setting up /etc/syslog.conf appropriately (see syslog.conf(5)). (If <br>
# pppd is compiled with extra debugging enabled, it will log messages <br>
# using facility local2 instead of daemon). <br>
#debug <br>
<br>
# Append the domain name &lt;d&gt; to the local host name for authentication <br>
# purposes. For example, if gethostname() returns the name porsche, <br>
# but the fully qualified domain name is porsche.Quotron.COM, you would <br>
# use the domain option to set the domain name to Quotron.COM. <br>
#domain &lt;d&gt; <br>
<br>
# Enable debugging code in the kernel-level PPP driver. The argument n <br>
# is a number which is the sum of the following values: 1 to enable <br>
# general debug messages, 2 to request that the contents of received <br>
# packets be printed, and 4 to request that the contents of transmitted <br>
# packets be printed. <br>
#kdebug n <br>
<br>
# Set the MTU [Maximum Transmit Unit] value to &lt;n&gt;. Unless the peer <br>
# requests a smaller value via MRU negotiation, pppd will request that <br>
# the kernel networking code send data packets of no more than n bytes <br>
# through the PPP network interface. <br>
#mtu &lt;n&gt; <br>
<br>
# Set the name of the local system for authentication purposes to &lt;n&gt;. <br>
# This will probably have to be set to your ISP user name if you are <br>
# using PAP/CHAP. <br>
#name &lt;n&gt; <br>
<br>
# Set the user name to use for authenticating this machine with the peer <br>
# using PAP to &lt;u&gt;. <br>
# Do NOT use this if you are using 'name' above! <br>
#user &lt;u&gt; <br>
<br>
# Enforce the use of the host name as the name of the local system for <br>
# authentication purposes (overrides the name option). <br>
#usehostname <br>
<br>
# Set the assumed name of the remote system for authentication purposes <br>
# to &lt;n&gt;. <br>
#remotename &lt;n&gt; <br>
<br>
# Add an entry to this system's ARP [Address Resolution Protocol] <br>
# table with the IP address of the peer and the Ethernet address of this <br>
# system. <br>
#proxyarp <br>
<br>
# Use the system password database for authenticating the peer using <br>
# PAP. <br>
#login <br>
<br>
# If this option is given, pppd will send an LCP echo-request frame to <br>
# the peer every n seconds. Under Linux, the echo-request is sent when <br>
# no packets have been received from the peer for n seconds. Normally <br>
# the peer should respond to the echo-request by sending an echo-reply. <br>
# This option can be used with the lcp-echo-failure option to detect <br>
# that the peer is no longer connected. <br>
#lcp-echo-interval &lt;n&gt; <br>
<br>
# If this option is given, pppd will presume the peer to be dead if n <br>
# LCP echo-requests are sent without receiving a valid LCP echo-reply. <br>
# If this happens, pppd will terminate the connection. Use of this <br>
# option requires a non-zero value for the lcp-echo-interval parameter. <br>
# This option can be used to enable pppd to terminate after the physical <br>
# connection has been broken (e.g., the modem has hung up) in <br>
# situations where no hardware modem control lines are available. <br>
#lcp-echo-failure &lt;n&gt; <br>
<br>
# Set the LCP restart interval (retransmission timeout) to &lt;n&gt; seconds <br>
# (default 3). <br>
#lcp-restart &lt;n&gt; <br>
<br>
# Set the maximum number of LCP terminate-request transmissions to &lt;n&gt; <br>
# (default 3). <br>
#lcp-max-terminate &lt;n&gt; <br>
<br>
# Set the maximum number of LCP configure-request transmissions to &lt;n&gt; <br>
# (default 10). <br>
# Some PPP servers are slow to start up. You may need to increase this <br>
# if you keep getting 'serial line looped back' errors and your are SURE <br>
# that you have logged in correctly and PPP should be starting on the server. <br>
#lcp-max-configure &lt;n&gt; <br>
<br>
# Set the maximum number of LCP configure-NAKs returned before starting <br>
# to send configure-Rejects instead to &lt;n&gt; (default 10). <br>
#lcp-max-failure &lt;n&gt; <br>
<br>
# Set the IPCP restart interval (retransmission timeout) to &lt;n&gt; <br>
# seconds (default 3). <br>
#ipcp-restart &lt;n&gt; <br>
<br>
# Set the maximum number of IPCP terminate-request transmissions to &lt;n&gt; <br>
# (default 3). <br>
#ipcp-max-terminate &lt;n&gt; <br>
<br>
# Set the maximum number of IPCP configure-request transmissions to &lt;n&gt; <br>
# (default 10). <br>
#ipcp-max-configure &lt;n&gt; <br>
<br>
# Set the maximum number of IPCP configure-NAKs returned before starting <br>
# to send configure-Rejects instead to &lt;n&gt; (default 10). <br>
#ipcp-max-failure &lt;n&gt; <br>
<br>
# Set the PAP restart interval (retransmission timeout) to &lt;n&gt; seconds <br>
# (default 3). <br>
#pap-restart &lt;n&gt; <br>
<br>
# Set the maximum number of PAP authenticate-request transmissions to <br>
# &lt;n&gt; (default 10). <br>
#pap-max-authreq &lt;n&gt; <br>
<br>
# Set the CHAP restart interval (retransmission timeout for <br>
# challenges) to &lt;n&gt; seconds (default 3). <br>
#chap-restart &lt;n&gt; <br>
<br>
# Set the maximum number of CHAP challenge transmissions to &lt;n&gt; <br>
# (default 10). <br>
#chap-max-challenge <br>
<br>
# If this option is given, pppd will re-challenge the peer every &lt;n&gt; <br>
# seconds. <br>
#chap-interval &lt;n&gt; <br>
<br>
# With this option, pppd will accept the peer's idea of our local IP <br>
# address, even if the local IP address was specified in an option. <br>
#ipcp-accept-local <br>
<br>
# With this option, pppd will accept the peer's idea of its (remote) IP <br>
# address, even if the remote IP address was specified in an option. <br>
#ipcp-accept-remote <br>
<br>
<br>
-------------------------------------------------------------------------------- <br>
<br>
<br>
12.2. 我应该使用什麽选项? (无 PAP/CHAP) <br>
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． 
<br>
<br>
然而，如果它无法运作的话，阅读样板档(/etc/ppp/options.tpl) 以及 pppd 
的线上使用手册并且告诉你所连线之伺服器的系统管理／使用者支援人员． 
<br>
<br>
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． <br>
<br>
<br>
<br>
-------------------------------------------------------------------------------- <br>
<br>
# /etc/ppp/options (NO PAP/CHAP) <br>
# <br>
# 避免 pppd 进入背景执行 <br>
-detach <br>
# <br>
# 使用数据机控制线 <br>
modem <br>
# 使用 uucp 形态的锁定档以避免它人取用串列装置 <br>
lock <br>
# 使用硬体流量控制 <br>
crtscts <br>
# 在递送表格中将此连结建立为预设递送装置 <br>
defaultroute <br>
# 不使用任何&quot;逸出&quot;控制序列 <br>
asyncmap 0 <br>
# 最大传送封包大小为 552 bytes <br>
mtu 552 <br>
# 最大接收封包大小为 552 bytes <br>
mru 552 <br>
# <br>
#-------END OF SAMPLE /etc/ppp/options (no PAP/CHAP) <br>
</p>

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