DHCP Server Configure:

1: apt-get install isc-dhcp-server

2. vim /etc/dhcp/dhcpd.conf

Edit these two lines:

option domain-name "bol-online.com";

option domain-name-servers 202.84.32.22, 202.84.32.23;           [ DNS ]

And also these three lines:

subnet 192.168.4.0 netmask 255.255.255.0{

range 192.168.4.1 192.168.4.20;

option routers 192.168.4.254;                        [ Local Gateway ]

}

3. /etc/init.d/isc-dhcp-server restart