Adding a bit of luxury: DHCP server

Start by emerging the dhcp server:

emerge dhcp

Edit the configuration in /etc/conf.d/dhcpd.conf and make it look something like this:

File: /etc/conf.d/dhcpd.conf

# This is the only DCHP server on the network
 authoritative
 
 # Set the dns servers
 option domain-name-servers xxx.xxx.0.6, xxx.xxx.0.7;
 
 # Set the lease time to one day
 default-lease-time 86400;
 max-lease-time 86400;
 
 # How the DNS should be updated
 ddns-update-style interim;
 
 # Change the domain name to whatever you want your domain to be.
 option domain-name "local.lan";
 
 # Our internal lan will use the 192.168.0.x class
 subnet 192.168.0.0 netmask 255.255.255.0 {
     # This will be us as we are the internet gateway
     routers 192.168.0.1;
 
     # Tell the clients what range to broadcast
     option broadcast-address 192.168.0.255;
 
     # Determine the range to manage, we leave room for 48 static addresses which 
     # can be used for servers (you don't want them to switch address because of dhcp)
     range 192.168.0.50 192.168.0.254;
 }

And start the dhcp:

/etc/init.d/dhcp start