Why?

I prefer using ethernet to Wifi to access internet. But, I‘m afraid, sometimes I have to use Wifi. So, I‘m going to configure my CentOS7 to be able to access internet through both Wifi and Ethernet.

Preparation

The ethernet interface/card name is not eth0 on my CentOS7, so I have to find it out.

Way 1:

- ls /etc/sysconfig/network-scripts/ifcfg-*

/etc/sysconfig/network-scripts/ifcfg-enp0s89  (<--- this is my Ethernet name)
/etc/sysconfig/network-scripts/ifcfg-lo             (<--- I don‘t know what it is, whatever, never mind.)
/etc/sysconfig/network-scripts/ifcfg-Tenda_BJ (<--- this is my Wifi router name)

Way2:

- or, follow the GUI "Settings --> Network --> Wired",

Click the settings button on Wired panel, then swith  to "Indentity --> Name".

the value of Name is enp0s89

so ‘enp0s89‘ is what I am looking for. This Ethernet name will be used in pppoe configuration later.

Install and setup PPPoE

1. #yum install rp-pppoe

2. You don‘t have to remove NetworkManager as mentioned in [1]. In fact, if you remove NetworkManager, you can‘t use Wifi anymore.

3. #pppoe-setup

Enter your Login Name (default user0): <input your xDSL account name>

INTERFACE
(default eth0): <input your Ethernet card name, it may not be eth0!>

DNS

Enter the DNS information here: <>
Enter the secondary DNS server address here: <>

PASSWORD
Please enter your Password: <input your xDSL account password>
Please re-enter your Password: <input your xDSL account password again>

USERCTRL
Please enter ‘yes‘ (three letters, lower-case.) if you want to allow normal user to start or stop DSL connection (default yes):

FIREWALLING
Choose a type of firewall (0-2): 1

4. connect your network:   /sbin/ifup ppp0

5. disconnect your network:  /sbin/ifdown ppp0

Reference

[1] 让CentOS进行PPPoE拨号上网，可用于ADSL网络环境！

Configure PPPoE on CentOS7