Initial Settings : Networking2019/01/14

[1]	Set static IP address to the server.

# set hostname

localhost:~ #

hostnamectl set-hostname dlp.srv.world

localhost:~ #

vi /etc/sysconfig/network/ifcfg-eth0

# change like follows (replace IP and other values for your own environment)

BOOTPROTO='

static

# broadcast address

BROADCAST='

10.0.0.255

'
ETHTOOL_OPTIONS=''

# server's static IP address

IPADDR='

10.0.0.30

'
MTU=''
NAME=''

# subnet mask

NETMASK='

255.255.255.0

# network address

NETWORK='

10.0.0.0

'
REMOTE_IPADDR=''
STARTMODE='auto'
DHCLIENT_SET_DEFAULT_ROUTE='yes'

localhost:~ #

vi /etc/sysconfig/network/config

# line 182: add your domain-name (it's added to "search" line in resolv.conf)

NETCONFIG_DNS_STATIC_SEARCHLIST="

srv.world

# line 195: set DNS server

NETCONFIG_DNS_STATIC_SERVERS="

10.0.0.10

localhost:~ #

vi /etc/sysconfig/network/routes

# create new: set default gatewway

default 10.0.0.1 - eth0

localhost:~ #

reboot

localhost:~ #

ip addr

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 52:54:00:f7:86:96 brd ff:ff:ff:ff:ff:ff
    inet 10.0.0.30/24 brd 10.0.0.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::5054:ff:fef7:8696/64 scope link
       valid_lft forever preferred_lft forever

[2]	Disable IPv6 like follows if you do not need it.

localhost:~ #

vi /etc/default/grub

# line 12: add

GRUB_CMDLINE_LINUX="

ipv6.disable=1

# apply changes

localhost:~ #

grub2-mkconfig -o /boot/grub2/grub.cfg

localhost:~ #

reboot

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