CentOS7のIPアドレス/デフォルトゲートウェイ/DNSサーバの再設定

環境

• VMware Workstation 16 Player
• CentOS7

デバイス確認

[root@localhost ~]# nmcli device
DEVICE       TYPE      STATE      CONNECTION
eth0         ethernet  connected  ens33
lo           loopback  unmanaged  --

設定変更(nmcli ～)

# 固定IPv4アドレス設定
[root@localhost ~]# nmcli connection modify ens33 ipv4.addresses 192.168.0.100

# デフォルトゲートウェイ設定
[root@localhost ~]# nmcli connection modify ens33 ipv4.gateway 192.168.0.1

# 参照する DNS設定
[root@localhost ~]# nmcli connection modify ens33 ipv4.dns 192.168.0.1

# インターフェースを再起動して設定を反映
[root@localhost ~]# nmcli connection down ens33; nmcli connection up ens33

設定後確認

# 設定確認
[root@localhost ~]# nmcli device show ens33
GENERAL.DEVICE:                 ens33
GENERAL.TYPE:                   ethernet
GENERAL.HWADDR:                 00:0C:29:CD:9C:2D
GENERAL.MTU:                    1500
GENERAL.STATE:                  100 (connected)
GENERAL.CONNECTION:             ens33
GENERAL.CON-PATH:               /org/freedesktop/NetworkManager/ActiveConnection/2
WIRED-PROPERTIES.CARRIER:       on
IP4.ADDRESS[1]:                 192.168.0.100/24
IP4.GATAWAY:                    192.168.0.1
IP4.ROUTE[1]:                   dst = 192.168.0.0/24, nh = 0.0.0.0, mt = 100
IP4.DNS[1]:                     192.168.0.1


# 接続確認
[root@localhost ~]# ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
    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: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:cd:9c:2d brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.100/24 brd 192.168.0.255scope global ens33
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fecd:9c2d/64 scope link
       valid_lft forever preferred_lft forever