2. Installing a DHCP Server

2. Installing a DHCP Server
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	Warning
	Don't set up a DHCP server on someone else's network - if the network already has clients set to use a DHCP server to get networking information, they may use your DHCP server instead of the server they should be using, interfering with the proper operation of the network.

DHCP must be configured on the command line:

Open a terminal and do the following:

Install the dhcp package. At the prompt, then switch to the root user: su -l root
Install the package: rpm -Uvh /path/to/files/dhcp*.rpm
Set up the DHCP server configuration file. There's a sample configuration file in the documentation from the package, which can be used as basis for editing: cp /usr/share/doc/dhcp-*/dhcp.conf.sample /etc/dhcpd.conf
The format is as follows:
Begin a section containing options for broadcast requests coming from the 192.168.5.0/255.255.255.0 network.
```
subnet 192.168.5.0 netmask 255.255.255.0 {
```
The range of IP addresses and subnet mask clients will use:
```
        range dynamic-bootp 192.168.5.1 192.168.5.99;
        option subnet-mask              255.255.255.0;
```
The default route (sometimes called the default gateway)
```
    	option routers			192.168.5.100;
```
The DNS domain name:
```
	option domain-name		"example.com";
```
The DNS servers PCs should use:
```
	option domain-name-servers	192.168.5.100;
```
The time when clients will attempt to renew their lease (6 hours), and the time when those credentials will expire if not renewed (12 hours).
```
        default-lease-time 21600;
        max-lease-time 43200;
```
The end of options for the subnet
```
}
```
Start the dhcpd service and set it to start by default by typing: service dhcpd start chkconfig dhcpd on
Confirm your DHCP server is working by attempting to get an IP address.

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