The firewall choices are:
0 - NONE: This script will not set any firewall rules. You are responsible
for ensuring the security of your machine. You are STRONGLY
recommended to use some kind of firewall rules.
1 - STANDALONE: Appropriate for a basic stand-alone web-surfing workstation
2 - MASQUERADE: Appropriate for a machine acting as an Internet gateway
for a LAN
>>> Choose a type of firewall (0-2): 0 #输入0，不开启防火墙
** Summary of what you entered **
Ethernet Interface: eth0
User name: bp20122999@cer
Activate-on-demand: No
Primary DNS: 223.5.5.5
Secondary DNS: 223.6.6.6
Firewalling: NONE
>>> Accept these settings and adjust configuration files (y/n)? y #输入y回车确认
Adjusting /etc/ppp/pppoe.conf
Adjusting /etc/resolv.conf
(But first backing it up to /etc/resolv.conf-bak)
Adjusting /etc/ppp/pap-secrets and /etc/ppp/chap-secrets
(But first backing it up to /etc/ppp/pap-secrets-bak)
(But first backing it up to /etc/ppp/chap-secrets-bak)
Congratulations, it should be all set up!
Type 'pppoe-start' to bring up your PPPoE link and 'pppoe-stop' to bring
it down. Type 'pppoe-status' to see the link status.
别急，我先吐吐苦水再写教程，之后我又走了弯路，我拨号后，还是不行，奇怪的是可以ping通DNS服务器，但是ping不通百度等。
这时我想起了那篇繁体文教程的话，于是
先把NetworkManager废了再说，
[root@KD src]# service NetworkManager stop
Stopping NetworkManager daemon: [ OK ]
然后pppoe-start拨号！显示
[root@KD src]# pppoe-start
.. Connected!
再然后还是不能ping通百度，没关系，我们重启network服务，在此之前先断了拨号
[root@KD src]# pppoe-stop
Killing pppd (3449)
Killing pppoe-connect (3433)
现在重启下network服务
[root@KD src]# service network restart
Shutting down interface eth0: [ OK ]
Shutting down loopback interface: [ OK ]
Bringing up loopback interface: [ OK ]
Bringing up interface eth0: [ OK ]
现在，再次拨号！！！
[root@KD src]# pppoe-start
.. Connected!
现在ping Linux公社！！！
[root@KD src]# ping
PING (119.75.217.56) 56(84) bytes of data.
64 bytes from 119.75.217.56: icmp_seq=1 ttl=47 time=58.7 ms
64 bytes from 119.75.217.56: icmp_seq=2 ttl=47 time=58.2 ms
64 bytes from 119.75.217.56: icmp_seq=3 ttl=47 time=58.9 ms
64 bytes from 119.75.217.56: icmp_seq=4 ttl=47 time=58.9 ms
ping通了！终于好了，当我看到网页一开始是一个圈，等我pppoe-start后突然出现百度页面时真特么是高兴坏了。
附录：
pppoe-start：拨号联网
pppoe-stop：断网
pppoe-status：查看连接状态
电脑重起后请再次stop掉NetworkManager，或者直接卸了它，然后再拨号。
这是终极教程，几乎涵盖了各个细节，如果还遇到故障可以给我评论~