Configure CentOS 7 Network Settings And Dnsmasq

configure centos7 network.md

Configure CentOS 7 Network Settings

from https://www.serverlab.ca/tutorials/linux/administration-linux/how-to-configure-centos-7-network-settings

• Static IP

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

  TYPE=Ethernet
  NAME=eth0
  DEVICE=eth0
  ONBOOT=yes
  IPADDR=192.168.1.X
  NETMASK=255.255.255.0
  GATEWAY=192.168.1.1
  BOOTPROTO=static
  DEFROUTE=no
  

• DNS

  nmcli connection show

  NAME  UUID TYPE  DEVICE
  eth0             eth0
  

  nmcli con mod eth0 ipv4.dns "8.8.8.8"
  nmcli connection up "eth0"
  systemctl restart network
  nmcli connection reload
  

• Dnsmasq

  yum install dnsmasq -y
  vi /etc/dnsmasq.conf
  

  resolv-file=/etc/resolv.dnsmasq.conf
  addn-hosts=/etc/dnsmasq.hosts
  listen-address=192.168.1.x
  

  vi /etc/resolv.dnsmasq.conf

  nameserver 8.8.8.8
  

  vi /etc/dnsmasq.hosts

  127.0.0.1 whatever.host.to.resolv
  

  systemctl start dnsmasq
  systemctl enable dnsmasq