Linux - 네트워크 설정 관련

출처 : http://warmz.tistory.com/832

 

* 리눅스 네트워크 관련 설정파일

 

  1) /etc/sysconfig/network-scripts/ifcfg-eth0   → 아이피,서브넷 마스크,(게이트웨이) 
  2) /etc/sysconfig/network   → 컴퓨터이름,(게이트웨이) 
  3) /etc/resolv.conf   → DNS 정보 
  4) /etc/hosts   → 네임서버 파일

 

 

[root@centos ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0

TYPE=Ethernet

UUID=cf810d30-f473-4707-b523-905e8bdbdc38

ONBOOT=yes

NM_CONTROLLED=yes

BOOTPROTO=none

IPADDR=192.168.219.238

PREFIX=24

GATEWAY=192.168.219.1

DNS1=168.126.63.1

DEFROUTE=yes

IPV4_FAILURE_FATAL=yes

IPV6INIT=no

NAME="System eth0"

HWADDR=00:30:18:AD:B6:F1

 

[root@centos ~]# /cat/sysconfig/network

-bash: /cat/sysconfig/network: No such file or directory

[root@centos ~]# cat /etc/sysconfig/network

NETWORKING=yes

HOSTNAME=centos.tanker

GATEWAY=192.168.219.1

 

[root@centos ~]# cat /etc/resolve.conf

cat: /etc/resolve.conf: No such file or directory

 

[root@centos ~]# cat /etc/hosts

127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4

 

::1         localhost localhost.localdomain localhost6 localhost6.localdomain6

 

[root@centos ~]# service network restart

Shutting down interface eth0:  [  OK  ]

Shutting down loopback interface:  [  OK  ]

Bringing up loopback interface:  [  OK  ]

Bringing up interface eth0:  Determining if ip address 192.168.219.238 is already in use for device eth0... [  OK  ]

 

### 라우팅 테이블 확인 방법

[root@centos ~]# route

Kernel IP routing table

Destination     Gateway         Genmask         Flags Metric Ref    Use Iface

192.168.219.0   *               255.255.255.0   U     0      0        0 eth0

link-local      *               255.255.0.0     U     1002   0        0 eth0

default         192.168.219.1   0.0.0.0         UG    0      0        0 eth0

[root@centos ~]# netstat -r

Kernel IP routing table

Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface

192.168.219.0   *               255.255.255.0   U         0 0          0 eth0

link-local      *               255.255.0.0     U         0 0          0 eth0

default         192.168.219.1   0.0.0.0         UG        0 0          0 eth0

[root@centos ~]# netstat -rn

Kernel IP routing table

Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface

192.168.219.0   0.0.0.0         255.255.255.0   U         0 0          0 eth0

169.254.0.0     0.0.0.0         255.255.0.0     U         0 0          0 eth0

 

0.0.0.0         192.168.219.1   0.0.0.0         UG        0 0          0 eth0

 

### 내/외부 PING 테스트 확인

[root@centos ~]# ping www.yahoo.com

PING ds-kr-fp3.wg1.b.yahoo.com (106.10.139.246) 56(84) bytes of data.

64 bytes from ir1.fp.vip.sg3.yahoo.com (106.10.139.246): icmp_seq=1 ttl=47 time=217 ms

64 bytes from ir1.fp.vip.sg3.yahoo.com (106.10.139.246): icmp_seq=2 ttl=47 time=216 ms

64 bytes from ir1.fp.vip.sg3.yahoo.com (106.10.139.246): icmp_seq=3 ttl=47 time=216 ms

 

 

[root@centos ~]# ping 192.168.219.1

PING 192.168.219.1 (192.168.219.1) 56(84) bytes of data.

64 bytes from 192.168.219.1: icmp_seq=1 ttl=64 time=0.520 ms

64 bytes from 192.168.219.1: icmp_seq=2 ttl=64 time=0.474 ms

64 bytes from 192.168.219.1: icmp_seq=3 ttl=64 time=0.474 ms