Set up a DHCP server in Linux

Set up a DHCP server in Linux-Linux Enterprise Application-Linux server application information. For details, refer to the following section. Original: Actors

I was studying how to set up a DNS server. I have been reading a DNS book recently. I have a big head. I want to change it to play, so I chose DHCP, I thought it would take a day to get it done. The result was just a look at the theory, and it was really easy. I was still looking for a book dedicated to studying DHCP. If I went deeper, I couldn't find the result. Khan, is DHCP so simple?

1. OS version
[Root @ server ~] # More/etc/redhat-release
Red Hat Enterprise Linux AS release 4 (Nahant Update 4)

2. Check whether the DHCP server software has been installed in the system.
[Root @ server ~] # Rpm-qa | grep dhcp
Dhcpv6_client-0.10-14_EL4

3. mount the disc and install the DHCP server software.
[Root @ server ~] # Mount/media/cdrom
Mount: block device/dev/hdc is write-protected, mounting read-only
[Root @ server RPMS] # find/media/cdrom-name "dhcp *"
/Media/cdrom/RedHat/RPMS/dhcpv6-0.10-14_EL4.i386.rpm
/Media/cdrom/RedHat/RPMS/dhcpv6_client-0.10-14_EL4.i386.rpm
/Media/cdrom/RedHat/RPMS/dhcp-3.0.1-58.EL4.i386.rpm
/Media/cdrom/RedHat/RPMS/dhcp-devel-3.0.1-58.EL4.i386.rpm
[Root @ server RPMS] # rpm-ivh/media/cdrom/RedHat/RPMS/dhcp-3.0.1-58.EL4.i386.rpm
[Root @ server RPMS] # rpm-qa | grep dhcp
Dhcp-3.0.1-58.EL4
Dhcpv6_client-0.10-14_EL4

The installation has been successful, haha

4. Check the files.
[Root @ server RPMS] # rpm-ql grep dhcp
...
/Etc/dhcpd. conf -------------------------- dhcp configuration file
/Etc/rc. d/init. d/dhcpd
/Etc/rc. d/init. d/dhcrelay
/Etc/sysconfig/dhcpd
/Etc/sysconfig/dhcrelay
/Usr/bin/omshell
/Usr/sbin/dhcpd
/Usr/sbin/dhcrelay
/Usr/share/doc/dhcp-3.0.1
/Usr/share/doc/dhcp-3.0.1/README
/Usr/share/doc/dhcp-3.0.1/RELNOTES
/Usr/share/doc/dhcp-3.0.1/dhcpd. conf. sample ----- template of the dhcp configuration file
/Usr/share/man/man1/omshell.1.gz
/Usr/share/man/man5/dhcp-eval.5.gz
/Usr/share/man/man5/dhcpd.conf.5.gz
/Usr/share/man/man5/dhcpd.leases.5.gz
/Usr/share/man/man8/dhcpd.8.gz
/Usr/share/man/man8/dhcrelay.8.gz
/Var/lib/dhcp
/Var/lib/dhcp/dhcpd. leases ----------------- The log file for IP Address Allocation

5. [root @ server RPMS] # more/etc/dhcpd. conf
Is there anything here? COPY the template file.
[Root @ server RPMS] # cp/usr/share/doc/dhcp-3.0.1/dhcpd. conf. sample/etc/dhcpd. conf

6. view the configuration file and change it as required.
[Root @ server RPMS] # more/etc/dhcpd. conf
Ddns-update-style interim;
Ignore client-updates;
Subnet 192.168.0.0 netmask 255.255.255.0 {
# --- Default gateway
Option routers 192.168.0.1;
Option subnet-mask limit 255.0;
# Option nis-domain "domain.org ";
Option domain-name "wiscom.com.cn ";
Option domain-name-servers 219.141.136.10, 211.147.6.3;
Option time-offset-18000; # Eastern Standard Time
# Option ntp-servers 192.168.1.1;
# Option netbios-name-servers 192.168.1.1;
# --- Selects point-to-point node (default is hybrid). Don't change this unless
# -- You understand Netbios very well
# Option netbios-node-type 2;
Range dynamic-bootp 192.168.0.128 192.168.0.254;
Default-lease-time 21600;
Max-lease-time 43200;
# We want the nameserver to appear at a fixed address
Host ns {
Next-server marvin.redhat.com;
Hardware ethernet 12: 34: 56: 78: AB: CD;
Fixed-address 207.175.42.254;
}
}

It is already clear that all configurations of this configuration have been configured.

7. Start the DHCP server.
[Root @ server RPMS] # service dhcpd start
Starting dhcpd: [OK]

8. Check the log to see if there are any errors.
[Root @ server RPMS] # tail-20/var/log/messages
Dec 9 18:05:19 server dhcpd: Wrote 0 deleted host decls to leases file.
Dec 9 18:05:19 server dhcpd: Wrote 0 new dynamic host decls to leases file.
Dec 9 18:05:19 server dhcpd: Wrote 0 leases to leases file.
Dec 9 18:05:19 server dhcpd: Internet Systems Consortium DHCP Server V3.0.1
Dec 9 18:05:19 server dhcpd:
Dec 9 18:05:19 server dhcpd: Copyright 2004 Internet Systems Consortium.
Dec 9 18:05:19 server dhcpd: All rights reserved.
Dec 9 18:05:19 server dhcpd: For info, please visit http://www.isc.org/sw/dhcp/
Dec 9 18:05:19 server dhcpd: Wrote 0 deleted host decls to leases file.
Dec 9 18:05:19 server dhcpd: Wrote 0 new dynamic host decls to leases file.
Dec 9 18:05:19 server dhcpd: Listening on LPF/eth0/00: 0c: 29: c5: 06: fc/192.168.0/24
Dec 9 18:05:19 server dhcpd: Wrote 0 leases to leases file.
Dec 9 18:05:19 server dhcpd: Listening on LPF/eth0/00: 0c: 29: c5: 06: fc/192.168.0/24
Dec 9 18:05:19 server dhcpd: Sending on LPF/eth0/00: 0c: 29: c5: 06: fc/192.168.0/24
Dec 9 18:05:19 server dhcpd: Sending on LPF/eth0/00: 0c: 29: c5: 06: fc/192.168.0/24
Dec 9 18:05:19 server dhcpd:
Dec 9 18:05:19 server dhcpd: Sending on Socket/fallback-net
Dec 9 18:05:19 server dhcpd: Sending on Socket/fallback-net
Dec 9 18:05:19 server dhcpd:
Dec 9 18:05:20 server dhcpd: dhcpd startup succeeded

9. OK. It is okay. It seems that it is too easy to configure a DHCP under LINUX, as long as the principle is understood.