241 lines
5.1 KiB
HTML
241 lines
5.1 KiB
HTML
<HTML
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><HEAD
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><TITLE
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>A sample /etc/ppp/ip-up script</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.52"><LINK
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REL="HOME"
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TITLE="Linux PPP HOWTO"
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HREF="index.html"><LINK
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REL="UP"
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TITLE="After the link comes up - the /etc/ppp/ip-up script"
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HREF="ip-up.html"><LINK
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REL="PREVIOUS"
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TITLE="Handling email queues"
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HREF="x1448.html"><LINK
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REL="NEXT"
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TITLE="Handling email"
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HREF="x1464.html"></HEAD
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><BODY
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CLASS="SECT1"
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BGCOLOR="#FFFFFF"
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TEXT="#000000"
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VLINK="#840084"
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ALINK="#0000FF"
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><DIV
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CLASS="NAVHEADER"
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><TABLE
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><TR
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COLSPAN="3"
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ALIGN="center"
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><A
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HREF="http://www.linuxports.com/howto/ppp"
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TARGET="_top"
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>Linux PPP HOWTO</A
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></TH
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></TR
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><TR
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><TD
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WIDTH="10%"
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ALIGN="left"
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>Prev</A
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></TD
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><TD
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WIDTH="80%"
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ALIGN="center"
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VALIGN="bottom"
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>Chapter 25. After the link comes up - the <TT
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CLASS="LITERAL"
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>/etc/ppp/ip-up</TT
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> script</TD
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><TD
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WIDTH="10%"
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ALIGN="right"
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VALIGN="bottom"
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><A
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HREF="x1464.html"
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>Next</A
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></TD
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></TR
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></TABLE
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ALIGN="LEFT"
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WIDTH="100%"></DIV
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><DIV
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CLASS="SECT1"
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><H1
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CLASS="SECT1"
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><A
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NAME="AEN1455"
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>25.3. A sample <TT
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CLASS="LITERAL"
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>/etc/ppp/ip-up</TT
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> script</A
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></H1
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><P
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>The example below provides a variety of example uses.</P
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><P
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> <TABLE
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BORDER="0"
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BGCOLOR="#E0E0E0"
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WIDTH="100%"
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><TR
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><TD
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><PRE
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CLASS="PROGRAMLISTING"
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>#!/bin/bash
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#
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# Script which handles the routing issues as necessary for pppd
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# Only the link to Newman requires this handling.
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#
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# When the ppp link comes up, this script is called with the following
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# parameters
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# $1 the interface name used by pppd (e.g. ppp3)
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# $2 the tty device name
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# $3 the tty device speed
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# $4 the local IP address for the interface
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# $5 the remote IP address
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# $6 the parameter specified by the 'ipparam' option to pppd
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#
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case "$5" in
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# Handle the routing to the Newman Campus server
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202.12.126.1)
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/sbin/route add -net 202.12.126.0 gw 202.12.126.1
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# and flush the mail queue to get their email there asap!
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/usr/sbin/sendmail -q &
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;;
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139.130.177.2)
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# Our Internet link
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# When the link comes up, start the time server and synchronise to the world
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# provided it is not already running
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if [ ! -f /var/lock/subsys/xntpd ]; then
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/etc/rc.d/init.d/xntpd.init start &
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fi
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# Start the news server (if not already running)
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if [ ! -f /var/lock/subsys/news ]; then
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/etc/rc.d/init.d/news start &
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fi
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;;
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203.18.8.104)
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# Get the email down to my home machine as soon as the link comes up
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# No routing is required as my home Ethernet is handled by IP
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# masquerade and proxyarp routing.
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/usr/sbin/sendmail -q &
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;;
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*)
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esac
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exit 0</PRE
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></TD
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></TR
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></TABLE
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> </P
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><P
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>As a result of bringing up the ppp link to our Newman campus and this
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script, we end up with the following routing table entries (this machine
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also is our general dial up PPP server AND handles our Internet link). I
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have interspersed comments in the output to help explain what each entry
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is) :-</P
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><P
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> <TABLE
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BORDER="0"
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BGCOLOR="#E0E0E0"
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WIDTH="100%"
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><TR
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><TD
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><PRE
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CLASS="PROGRAMLISTING"
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>[root@kepler /root]# route -n
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Kernel routing table
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Destination Gateway Genmask Flags MSS Window Use Iface
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# the HOST route to our remote internet gateway
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139.130.177.2 * 255.255.255.255 UH 1500 0 134 ppp4
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# the HOST route to our Newman campus server
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202.12.126.1 * 255.255.255.255 UH 1500 0 82 ppp5
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# the HOST route to my home ethernet
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203.18.8.104 * 255.255.255.255 UH 1500 0 74 ppp3
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# two of our general dial up PPP lines
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203.18.8.64 * 255.255.255.255 UH 552 0 0 ppp2
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203.18.8.62 * 255.255.255.255 UH 552 0 1 ppp1
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# the specific network route to the Newman campus LAN
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202.12.126.0 202.12.126.1 255.255.255.0 UG 1500 0 0 ppp5
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# the route to our local Ethernet (super-netting two adjacent C classes)
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203.18.8.0 * 255.255.254.0 U 1500 0 1683 eth0
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# the route to the loop back device
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127.0.0.0 * 255.0.0.0 U 3584 0 483 lo
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# the default route to the Internet
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default 139.130.177.2 * UG 1500 0 3633 ppp4</PRE
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></TD
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></TR
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></TABLE
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> </P
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></DIV
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><DIV
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CLASS="NAVFOOTER"
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><HR
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ALIGN="LEFT"
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WIDTH="100%"><TABLE
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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><A
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HREF="x1448.html"
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>Prev</A
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></TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="index.html"
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>Home</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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><A
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HREF="x1464.html"
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>Next</A
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></TD
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></TR
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><TR
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><TD
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WIDTH="33%"
|
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ALIGN="left"
|
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VALIGN="top"
|
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>Handling email queues</TD
|
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><TD
|
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WIDTH="34%"
|
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ALIGN="center"
|
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VALIGN="top"
|
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><A
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HREF="ip-up.html"
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>Up</A
|
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></TD
|
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><TD
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WIDTH="33%"
|
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ALIGN="right"
|
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VALIGN="top"
|
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>Handling email</TD
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></TR
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></TABLE
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></DIV
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></BODY
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></HTML
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> |