重装系统debian 8 能上网，能ping通网关，但ping不通163和baidu,求解

[quote="85471212"]重装系统debian 8 能上网，能ping通网关，但ping不通163和baidu,求解[/quodebian:
debian:~$ping 192.168.211.1
PING 192.168.211.1 (192.168.211.1) 56(84) bytes of data.
64 bytes from 192.168.211.1: icmp_seq=1 ttl=254 time=2.05 ms
64 bytes from 192.168.211.1: icmp_seq=2 ttl=254 time=2.03 ms
64 bytes from 192.168.211.1: icmp_seq=3 ttl=254 time=2.02 ms
64 bytes from 192.168.211.1: icmp_seq=4 ttl=254 time=2.06 ms
^C
--- 192.168.211.1 ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3003ms
rtt min/avg/max/mdev = 2.029/2.045/2.065/0.057 ms
debian:~$ ping mirrors.163.com
PING mirrors.163.com (123.58.173.185) 56(84) bytes of data.
^C
--- mirrors.163.com ping statistics ---
11 packets transmitted, 0 received, 100% packet loss, time 10080ms

和


是 完全不一样的

是这么ping的，不通
debian:~$ ping www.baidu.com
PING www.a.shifen.com (61.135.169.125) 56(84) bytes of data.
^C
--- www.a.shifen.com ping statistics ---
6 packets transmitted, 0 received, 100% packet loss, time 5040ms

ping 别的呢？
比如这个论坛，看看能不能通

不通，但能上网
debian:~$ ping forum.ubuntu.org.cn
PING forum.ubuntu.org.cn (198.71.86.201) 56(84) bytes of data.
^C
--- forum.ubuntu.org.cn ping statistics ---
12 packets transmitted, 0 received, 100% packet loss, time 10999ms

是不是路由器防火墙禁止了？

有的isp不允许ping。

嗯，试了好几个，现在的关键问题是upgrade 提示
0 upgraded, 0 newly installed, 0 to remove and 180 not upgraded.

系统不能更新？不是能上网吗。
以前用过长城宽带就是你这样，只能ping网关和它提供的dns服务器，但是上网、系统更新什么的都正常。

路由器防火墙状态怎么看？

之前安装了fcitx和wiznote都可以

现在的状况就是能上网，但ping不通mirrors.163.com

參考 這一篇 試試別的工具 看看
http://askubuntu.com/questions/428940/i ... ser/428949
I can not ping microsoft.com but can open it using browser

软件源是否包含了非官方源？Debian 从 8.0 升级到 8.3 几乎不可能出问题。
执行 apt-get -s dist-upgrade，将输出贴出来看看？
将 /etc/apt/sources.list 和 /etc/apt/sources.list.d 贴出来看看？