Linux：网络配置

网络配置

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1.网卡配置

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

  1DEVICE=eth0
  2 HWADDR=00:0C:29:93:41:2B
  3 TYPE=Ethernet
  4 UUID=d775c95a-a13d-4859-8460-0ff336f1f406
  5 ONBOOT=yes　　　　　　　　#开机自启
  6 NM_CONTROLLED=yes
  7 BOOTPROTO=static　　　　　#手动获取ip地址,如果自动改为BOOTPROTO=dhcp
  8 GATEWAY=192.168.0.1
  9 IPADDR=192.168.0.101
 10 NETMASK=255.255.255.0
 11 DNS1=192.168.1.1　　　　　　#可添加多个DNS备用地址

2.DNS更改的配置文件

vim /etc/reslov.conf

  1 # Generated by NetworkManager
  2 nameserver 192.168.1.1

 3.重启网络

service network restart

正在关闭接口 eth0： 设备状态：3 (断开连接)
                                                           [确定]
关闭环回接口：                                             [确定]
弹出环回接口：                                             [确定]
弹出界面 eth0： 活跃连接状态：激活中
活跃连接路径：/org/freedesktop/NetworkManager/ActiveConnection/1
状态：激活的
连接被激活
                                                           [确定

4.清除iptable

iptables -F       #清空iptable

 /etc/init.d/iptables save    #保存

iptables：将防火墙规则保存到 /etc/sysconfig/iptables：     [确定]

 5.关闭selinux

vim /etc/selinux/config

  1 
  2 # This file controls the state of SELinux on the system.
  3 # SELINUX= can take one of these three values:
  4 #     enforcing - SELinux security policy is enforced.
  5 #     permissive - SELinux prints warnings instead of enforcing.
  6 #     disabled - No SELinux policy is loaded.
  7 SELINUX=disabled　　　　　　#将selinux修改disable
  8 # SELINUXTYPE= can take one of these two values:
  9 #     targeted - Targeted processes are protected,
 10 #     mls - Multi Level Security protection.
 11 SELINUXTYPE=targeted

 6.网络配置常用命令

1)查看网卡与网线的连接情况

　　　　　mii-tool命令  http://www.cnblogs.com/Spiro-K/p/6384793.html

2)单网卡启动

ifconfig eth0 down

ifconfig eth0 up

 3)单网卡多IP配置

ifconfig eth0 : IP地址/掩码

ifconfig eth0 : IP地址/掩码

 4)主机名

查看
　　hostname

临时更改
　　hostname     name

写入配置文件
　　vim /etc/sysconfig/network

5)DNS配置

DNS简易配置文件
    vim /etc/hosts

DNS配置文件
    vim /etc/resolv.conf

6)查看路由表

route -n

Kernel IP routing table
Destination     Gateway         Genmask         Flags 　　　　 Metric Ref    Use Iface
192.168.0.0     0.0.0.0         255.255.255.0   U     #直连　　 　　1      0        0 eth0
0.0.0.0         192.168.0.1     0.0.0.0         UG   #网关　　　　　0      0        0 eth0

7)查看开启端口

netstat -antp

Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID/Program name   
tcp        0      0 127.0.0.1:25                0.0.0.0:*                   LISTEN      1444/master         
tcp        0      0 127.0.0.1:6010              0.0.0.0:*                   LISTEN      1571/sshd           
tcp        0      0 127.0.0.1:6011              0.0.0.0:*                   LISTEN      1960/sshd           
tcp        0      0 0.0.0.0:22                  0.0.0.0:*                   LISTEN      1365/sshd           
tcp        0      0 192.168.0.101:22            192.168.0.100:55989         ESTABLISHED 1960/sshd           
tcp        0      0 192.168.0.101:22            192.168.0.100:52818         ESTABLISHED 1571/sshd           
tcp        0      0 ::1:25                      :::*                        LISTEN      1444/master         
tcp        0      0 ::1:6010                    :::*                        LISTEN      1571/sshd           
tcp        0      0 ::1:6011                    :::*                        LISTEN      1960/sshd           
tcp        0      0 :::22                       :::*                        LISTEN      1365/sshd