CentOS 6.5 dual-nic configuration of an On-premises network connected LAN

CentOS 6.5 dual-nic configuration of an On-premises network connected LAN

CentOS 6.5 dual-nic configuration of an On-premises network connected LAN

1. Configure DNS

Modify the DNS configuration file of the corresponding Nic
# Vi/etc/resolv. conf
Modify the following content to set multiple settings:

Nameserver 202.106.0.20

Nameserver 114.114.114.114

2. Configure the gateway for the Internet Nic
Modify the gateway configuration file
[Root @ centos] # vi/etc/sysconfig/network

Modify the following content
NETWORKING = yes (indicates whether the system uses the network, which is generally set to yes. If it is set to no, the network cannot be used, and many system service programs cannot be started)
HOSTNAME = centos (set the Host Name of the local machine. The host name set here must correspond to the host name set in/etc/hosts)
GATEWAY = 192.168.1.1 (note: the GATEWAY must be configured as an Internet Nic)

3. Configure the IP address

Modify the configuration file of the corresponding Nic IP Address
# Vi/etc/sysconfig/network-scripts/ifcfg-eth0

Modify the following content

DEVICE = eth0 # describe the DEVICE alias corresponding to the NIC, for example, it is eth0 in the ifcfg-eth0 file, the Dell server is generally: em1, em2
BOOTPROTO = static # Set the way for the NIC to obtain the IP address. The possible options are static, dhcp, or bootp, which respectively correspond to the IP address specified by the static state and the IP address obtained through the dhcp protocol, IP addresses obtained through the bootp protocol
BROADCAST = 192.168.0.255 # corresponding subnet BROADCAST address
HWADDR = 00: 07: E9: 05: E8: B4 # physical address of the corresponding Nic
IPADDR = 12.168.1.2 # If you set the method for obtaining the IP address from the NIC to static, this field specifies the IP address of the NIC.

GATEWAY = # Note: The intranet Nic must be empty. Otherwise, the two NICs cannot access the Internet after being enabled at the same time.
IPV6INIT = no
IPV6_AUTOCONF = no
NETMASK = 255.255.255.0 # network mask corresponding to the network adapter
NETWORK = 192.168.1.0 # NETWORK address of the NIC
ONBOOT = yes # whether to set this network interface when the system starts. If it is set to yes, the device is activated when the system starts.

4. Restart the network configuration.
# Service network restart
Or
#/Etc/init. d/network restart