1.开机自动连接问题
官方WIKI有解答
2.禁用IPV6
⒈打开文件 /etc/modprobe.d/aliases
⒉把 alias net-pf-10 ipv6 那行用 # 注释掉
⒊打开文件 /etc/modprobe.d/blacklist
⒋加入一行 blacklist ipv6
⒌重启
⒍在terminal输入命令行： ip a | grep inet6
3.双网卡问题
sudo ifconfig eth1 down 或者 up
sudo ifconfig eth0 up 或者 down
sudo dhclient
4.终极解决方案
1.sudo gedit /etc/ppp/peers/dsl-provider
复制一下代码，替换原先的：
# Configuration file for PPP, using PPP over Ethernet
# to connect to a DSL provider.
#
# See the manual page pppd(Cool for information on all the options.
##
# Section 1
#
# Stuff to configure…
# MUST CHANGE: Uncomment the following line, replacing the user@provider.net
# by the DSL user name given to your by your DSL provider.
# (There should be a matching entry in /etc/ppp/pap-secrets with the password.)
#user myusername@myprovider.net
# Use the pppoe program to send the ppp packets over the Ethernet link
# This line should work fine if this computer is the only one accessing
# the Internet through this DSL connection. This is the right line to use
# for most people.
#pty "/usr/sbin/pppoe -I eth0 -T 80 -m 1452"
# An even more conservative version of the previous line, if things
# don’t work using -m 1452…
#pty "/usr/sbin/pppoe -I eth0 -T 80 -m 1412"
# If the computer connected to the Internet using pppoe is not being used
# by other computers as a gateway to the Internet, you can try the following
# line instead, for a small gain in speed:
#pty "/usr/sbin/pppoe -I eth0 -T 80"
# The following two options should work fine for most DSL users.
# Assumes that your IP address is allocated dynamically
# by your DSL provider…
noipdefault
# Try to get the name server addresses from the ISP.
usepeerdns
# Use this connection as the default route.
# Comment out if you already have the correct default route installed.
defaultroute
##
# Section 2
#
# Uncomment if your DSL provider charges by minute connected
# and you want to use demand-dialing.
#
# Disconnect after 300 seconds (5 minutes) of idle time.
#demand
#idle 300
##
# Section 3
#
# You shouldn’t need to change these options…
hide-password
lcp-echo-interval 20
lcp-echo-failure 3
# Override any connect script that may have been set in /etc/ppp/options.
connect /bin/true
noauth
persist
mtu 1492
# RFC 2516, paragraph 7 mandates that the following options MUST NOT be
# requested and MUST be rejected if requested by the peer:
# Address-and-Control-Field-Compression (ACFC)
noaccomp
# Asynchronous-Control-Character-Map (ACCM)
default-asyncmap
plugin rp-pppoe.so eth0
# Configuration file for PPP, using PPP over Ethernet
# to connect to a DSL provider.
#
# See the manual page pppd(Cool for information on all the options.
##
# Section 1
#
# Stuff to configure…
# MUST CHANGE: Uncomment the following line, replacing the user@provider.net
# by the DSL user name given to your by your DSL provider.
# (There should be a matching entry in /etc/ppp/pap-secrets with the password.)
#user myusername@myprovider.net
# Use the pppoe program to send the ppp packets over the Ethernet link
# This line should work fine if this computer is the only one accessing
# the Internet through this DSL connection. This is the right line to use
# for most people.
#pty "/usr/sbin/pppoe -I eth0 -T 80 -m 1452"
# An even more conservative version of the previous line, if things
# don’t work using -m 1452…
#pty "/usr/sbin/pppoe -I eth0 -T 80 -m 1412"
# If the computer connected to the Internet using pppoe is not being used
# by other computers as a gateway to the Internet, you can try the following
# line instead, for a small gain in speed:
#pty "/usr/sbin/pppoe -I eth0 -T 80"
# The following two options should work fine for most DSL users.
# Assumes that your IP address is allocated dynamically
# by your DSL provider…
noipdefault
# Try to get the name server addresses from the ISP.
usepeerdns
# Use this connection as the default route.
# Comment out if you already have the correct default route installed.
defaultroute
##