ping google.com或8.8.8.8失败 [英] ping google.com or 8.8.8.8 fails
问题描述
我使用的是Cent OS 6.4，它在官方实验室。
I am using Cent OS 6.4 and it is in a official lab.
ping google.com提供以下输出并挂起：
ping google.com gives the below output and hangs:
[root @ LAB1〜]＃ping google.com
PING google.com（74.125.236.195）56（84）个字节的数据。
[root@LAB1 ~]# ping google.com
PING google.com (74.125.236.195) 56(84) bytes of data.
ping 8.8.8.8也会产生相同的结果。我可以从浏览器（Mozilla）访问互联网。网络设置或配置有问题吗？
ping 8.8.8.8 also yields the same result. I am able to access internet from browser(Mozilla). Is there a problem with the network settings or configuration?
以下是traceroute的输出 - n 8.8.8.8
[root @ LAB1〜]＃traceroute -n 8.8.8.8
traceroute to 8.8 .8.8（8.8.8.8），最多30跳，60字节数据包
1 * * *
2 * * *
3 * * *
4 * * *
5 * * *
6 * ^ Z
Below is the output from traceroute - n 8.8.8.8
[root@LAB1 ~]# traceroute -n 8.8.8.8
traceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 60 byte packets
1 * * *
2 * * *
3 * * *
4 * * *
5 * * *
6 *^Z
从路由-n如果它有帮助
Below is the output from route -n if it helps
[root @ LAB1〜]＃route -n
内核IP路由表
目标网关基因掩码标志度量标准使用Iface
192.168.1.0 0.0.0.0 255.255.255.0 U 1 0 0 eth0
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 eth0
[root@LAB1 ~]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.1.0 0.0.0.0 255.255.255.0 U 1 0 0 eth0
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 eth0
由于我是网络新手，我无法识别这个问题。这里的任何帮助是非常感谢...
As I am new to networking, I am not able to identify the issue. Any help here is much appreciated...
编辑：我尝试上述ping的主要原因是解决yum更新命令无法解析镜像网站...
Edit : The main reason for me to try the above ping is to resolve an yum update command that fails to resolve the mirror sites...
推荐答案
ICMP不允许在您访问互联网后通过防火墙/路由器传出。
ICMP is'nt allowed outgoing through the firewall / router behind you are accessing Internet.
此
[root@LAB1 ~]# ping google.com
PING google.com (74.125.236.195) 56(84) bytes of data.
事实上，您可以浏览网页，表示您正在解析google.com >
And the fact you can browse the web means you are resolving google.com (DNS protocol)
traceroute使用ICMP二。
traceroute use ICMP two.
这篇关于ping google.com或8.8.8.8失败的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
