CentOS 기본 게이트웨이 변경

CentOS 기본 게이트웨어 변경
/etc/sysconfig/network

1 영구 적용

재부팅 후에도 적용됨.

명령어

echo 'GATEWAY=게이트웨이주소' >> /etc/sysconfig/network
service network restart

실행예시

[root@zetawiki ~]# cat /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=zetawiki
[root@zetawiki ~]# cat /etc/sysconfig/network
[root@zetawiki ~]# cat /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=zetawiki
GATEWAY=192.168.0.1
[root@zetawiki ~]# service network restart
Shutting down interface eth0:                              [  OK  ]
Shutting down interface eth1:                              [  OK  ]
Shutting down loopback interface:                          [  OK  ]
Bringing up loopback interface:                            [  OK  ]
Bringing up interface eth0:                                [  OK  ]
Bringing up interface eth1:                                [  OK  ]

→ 변경 전후 cat /etc/sysconfig/network와 route 로 상태 확인

2 임시 적용

재부팅하면 사라짐.

명령어

route add default gw 게이트웨이주소 장치명

실행예시

[root@zetawiki ~]# route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.0.0     *               255.255.255.0   U     1      0        0 eth1
default         192.168.0.1     0.0.0.0         UG    0      0        0 eth1
[root@zetawiki ~]# route add default gw 192.168.0.2 eth1
[root@zetawiki ~]# route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.0.0     *               255.255.255.0   U     1      0        0 eth1
default         192.168.0.2     0.0.0.0         UG    0      0        0 eth1
default         192.168.0.1     0.0.0.0         UG    0      0        0 eth1

→ default 게이트웨이를 변경하면 네트워크가 안될 수도 있으니 주의!

3 같이 보기

4 참고

http://www.linuxquestions.org/questions/linux-networking-3/permanently-add-static-route-16769/