[Appendix D] A dhcpd Reference
Appendix D D. A dhcpd ReferenceContents:Compiling dhcpdThe dhcpd CommandThe dhcpd.conf Configuration FileThis appendix covers the syntax of the dhcpd command and the
dhcpd.conf configuration file. It is a reference to the Internet
Software Consortium (ISC) Dynamic Host Configuration Protocol (DHCP)
server, ISC dhcpd. To fully understand how to configure and use
dhcpd in realistic network environments, see the tutorial and
sample configuration files in Chapter 9, Configuring Network Servers .dhcpd is under development.
The information in this appendix
is based on Beta Release 5 Patch Level 16. As a beta release, this
software is bound to be upgraded and changed. Refer to the Web page
http://www.isc.org/dhcp.html for the most recent information about
dhcpd. And remember, a DHCP implementation from another vendor
will probably be configured in a completely different manner.D.1 Compiling dhcpdThe source code for dhcpd can be obtained through the ISC
Web site
at www.isc.org or via anonymous FTP at ftp://ftp.isc.org/isc/dhcp.
The compressed tar file at the time of this writing was
DHCPD-BETA-5.16.tar.gz, though this name will change as new
versions are released. Download, gunzip, and untar the file:> ftp ftp.isc.org
Connected to pub1.bryant.vix.com.
220 pub1.bryant.vix.com FTP server ready.
Name (ftp.isc.org:craig): anonymous
331 Guest login ok, send your complete email address as password.
Password:
230 Guest login ok, access restrictions apply.
ftp> cd isc/dhcp
250 CWD command successful.
ftp> binary
200 Type set to I.
ftp> get DHCPD-BETA-5.16.tar.gz
200 PORT command successful.
150 Opening BINARY mode data connection for DHCPD-BETA-5.16.tar.gz
226 Transfer complete.
181892 bytes received in 17 secs (10 Kbytes/sec)
ftp> quit
221 Goodbye.
> gunzip DHCPD-BETA-5.16.tar.gz
> tar -xvf DHCPD-BETA-5.16.tar
DHCPD-BETA-5.16/
DHCPD-BETA-5.16/cf/
DHCPD-BETA-5.16/cf/alphaosf.h
DHCPD-BETA-5.16/cf/bsdos.h
DHCPD-BETA-5.16/cf/freebsd.h
...
DHCPD-BETA-5.16/includes/
DHCPD-BETA-5.16/includes/netinet/
DHCPD-BETA-5.16/includes/netinet/if_ether.h
DHCPD-BETA-5.16/includes/netinet/ip.h
DHCPD-BETA-5.16/includes/netinet/udp.hChange to the newly created directory, DHCPD-BETA-5.16 in the example,
and run configure. configure determines the type of UNIX
system you're running and creates the correct Makefile for that system.
If configure cannot determine what version of UNIX you're running,
you must build your own Makefile by hand. Next, type make to
compile the daemon. Finally, copy the daemon and the manpages
to the correct directories:# cd DHCPD-BETA-5.16
# configure
System Type: linux
# make
cc -g -c dhcpd.c -o dhcpd.o
cc -g -c dhcp.c -o dhcp.o
cc -g -c bootp.c -o bootp.o
...
nroff -man dhcpd.conf.5 >dhcpd.conf.cat5
# make installThe DHCP daemon should compile without errors. If you get compile
errors or configure cannot determine your system configuration, you
should consider abandoning the compile and notifying the support group.
Join the support group mailing list by going to
http://www.fugue.com/dhcp.
Once you join, send mail to the dhcp-server@fugue.com mailing
list describing your configuration and the exact problem you have.
The list is read by most of the people using dhcpd. Someone may
have already solved your problem.Simply installing dhcpd may not be all that is required. Remember,
dhcpd is beta software. Read the README file very carefully.
dhcpd runs on a wide variety of systems, including OSF/1, most recent
BSD derivatives, Solaris, and Linux. It runs best on OSF/1 and BSD. On
other systems it may have some limitations. For example, on both Solaris
and Linux it can support only one network interface. dhcpd also
may require some system-specific configuration. Our sample Linux 2.0.0
system is an excellent example of this. To successfully run dhcpd
we had to add the following entry to the /etc/hosts table:255.255.255.255 all-onesAnd we had to add a specific route for the limited broadcast address,
255.255.255.255:# route add -host all-ones dev eth0To reinstall the limited broadcast address in the kernel
routing table after each boot, we added the following code to the
/etc/rc.d/rc.inet2 startup script:# Install the limited broadcast route and start DHCP
if [ -f /etc/dhcpd.conf ]; then
echo -n " dhcpd"
route add -host all-ones dev eth0
/usr/sbin/dhcpd
fiThe information needed to complete these extra configuration steps was
clearly defined in the README file. Read it before you try to
run dhcpd.C.3 Zone File RecordsD.2 The dhcpd Command[ Library Home | DNS & BIND | TCP/IP | sendmail | sendmail Reference | Firewalls | Practical Security ]
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