目的: 建立起 DHCP server，讓所有接上這個網域的電腦能不需 config 即可連上網路。
說明: DNS 為 168.95.1.1，domain 為 posiedon。網段為 192.168.0.0/24，其中 254 給 server，1 保留，因此分配出去的 IP range 為 2 - 253
首先，安裝 dhcpcd
emerge dhcpcd
接下來，編輯 /etc/dhcp/dhcpd.conf
# dhcpd.conf
#
# Sample configuration file for ISC dhcpd
#
# option definitions common to all supported networks...
option domain-name "poseidon";
option domain-name-servers 168.95.1.1;
option routers 192.168.0.254;
ddns-update-style none;
default-lease-time 600;
max-lease-time 7200;
# If this DHCP server is the official DHCP server for the local
# network, the authoritative directive should be uncommented.
#authoritative;
# Use this to send dhcp log messages to a different log file (you also
# have to hack syslog.conf to complete the redirection).
log-facility local7;
# No service will be given on this subnet, but declaring it helps the
# DHCP server to understand the network topology.
# A slightly different configuration for an internal subnet.
subnet 192.168.0.0 netmask 255.255.255.0 {
range 192.168.0.2 192.168.0.253;
}
最後，啟動 DHCPD
/etc/init.d/dhcpd start
加入開機即起動的行列
rc-update add dhcpd default