linux网络配置正确，能够ping通外网地址，无法打开网页问题

作者：北国熊

linux网络配置正确，能够ping通外网地址，无法打开网页问题



首先确定系统的网络配置没有问题，并且能够访问外网，通过以下方法进行确认：

[root@localhost ~]# more /etc/sysconfig/network-scripts/ifcfg-eth0 

# Intel Corporation 82545EM Gigabit Ethernet Controller (Copper)

DEVICE=eth0

BOOTPROTO=none

HWADDR=00:50:56:bd:00:56

ONBOOT=yes

NETMASK=255.255.255.0

IPADDR=172.16.6.50

GATEWAY=172.16.6.1

TYPE=Ethernet

       [root@localhost ~]# ping 172.16.6.1

PING 172.16.6.1 (172.16.6.1) 56(84) bytes of data.

64 bytes from 172.16.6.1: icmp_seq=1 ttl=255 time=0.890 ms

64 bytes from 172.16.6.1: icmp_seq=2 ttl=255 time=0.841 ms



--- 172.16.6.1 ping statistics ---

2 packets transmitted, 2 received, 0% packet loss, time 999ms

rtt min/avg/max/mdev = 0.841/0.865/0.890/0.038 ms



在确定网络没问题的情况下,可以通过如下步骤寻找解决办法:



1) 确定设置了域名服务器



[root@localhost ~]# more /etc/resolv.conf 

        search localdomain

        nameserver 8.8.8.8          #谷歌的免费DNS



2) 确定设置了网关



[root@localhost ~]# grep GATEWAY /etc/sysconfig/network-scripts/ifcfg*



-------------------------------------------------------------------



/etc/sysconfig/network-scripts/ifcfg-eth0:GATEWAY=172.16.6.1



-------------------------------------------------------------------



如果没有设置,可以通过如下两种方式增加网关:



a.



[root@localhost ~]# route add default gw 192.168.40.1



b.



[root@localhost ~]#vi /etc/sysconfig/network-scripts/ifcfg*

重启network服务:

[root@localhost ~]# service network restart





3) 确定可用dns解析



[root@localhost ~]# grep hosts /etc/nsswitch.conf

-------------------------------------------------------------------



hosts: files dns

-------------------------------------------------------------------



排除以上情况，问题基本上可以解决……