Static IP

General Information

Configure static IP, Mask, Gateway, and DNS.

Checklist

• Distro(s): Debian or Enterprise Linux

→ Add section for NetworkManager setup via nmcli and nmtui

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

• Edit /etc/sysconfig/network-scripts/ifcfg-eth0

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

• DHCP Setup Example (Default)

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

• 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

• Edit /etc/resolv.conf

  vi /etc/resolv.conf
   
  nameserver 8.8.8.8
  nameserver 8.8.4.4

• Restart network service

  /etc/init.d/network restart