Static IP

General Information

Configure static IP, Mask, Gateway, and DNS.

Checklist

• Distro(s): Debian or Enterprise Linux

if possible, bring interface down first: ifdown eth0.

• Edit /etc/network/interfaces

  nano /etc/network/interfaces

• DHCP Setup Example (Default)

  auto eth0
  iface eth0 inet dhcp

• Static Setup Example

  auto eth0
  iface eth0 inet static
    address 192.168.0.100
    netmask 255.255.255.0
    gateway 192.168.0.254
    dns-nameservers 8.8.8.8 8.8.4.4

• Bring the interface up (if brought down at the start)

  ifup eth0

• Otherwise, restart to fix nameserver conflicts between dhclient and static.

  shutdown -r now

1) Edit /etc/sysconfig/network-scripts/ifcfg-eth0

vi /etc/sysconfig/network-scripts/ifcfg-eth0

2) DHCP Setup Example (Default)

DEVICE=eth0
ONBOOT=no (change to yes to have DHCP start automatically)
NM_CONTROLLED=yes
BOOTPROTO=dhcp

3) Static Setup Example

DEVICE=eth0
ONBOOT=yes
NM_CONTROLLED=no
BOOTPROTO=static
IPADDR=192.168.0.101
NETMASK=255.255.255.0
GATEWAY=192.168.0.254

4) Edit /etc/resolv.conf

vi /etc/resolv.conf
 
nameserver 8.8.8.8
nameserver 8.8.4.4

5) Restart network service

/etc/init.d/network restart