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标题: 访问外网报错ping: unknown host www.baidu.com未解决 [打印本页]

作者: jiawang 时间: 2018-1-19 18:04
标题: 访问外网报错ping: unknown host www.baidu.com未解决
[root@strong ~]# ifconfig
eno16777736: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
      inet 192.168.133.131  netmask 255.255.255.0  broadcast 192.168.133.255
      inet6 fe80::20c:29ff:fef0:945  prefixlen 64  scopeid 0x20<link>
      ether 00:0c:29:f0:09:45  txqueuelen 1000  (Ethernet)
      RX packets 2191  bytes 216765 (211.6 KiB)
      RX errors 0  dropped 0  overruns 0  frame 0
      TX packets 755  bytes 117793 (115.0 KiB)
      TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
      inet 127.0.0.1  netmask 255.0.0.0
      inet6 ::1  prefixlen 128  scopeid 0x10<host>
      loop  txqueuelen 0  (Local Loopback)
      RX packets 6  bytes 504 (504.0 B)
      RX errors 0  dropped 0  overruns 0  frame 0
      TX packets 6  bytes 504 (504.0 B)
      TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

virbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
      inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255
      ether 52:54:00:f5:50:2a  txqueuelen 0  (Ethernet)
      RX packets 0  bytes 0 (0.0 B)
      RX errors 0  dropped 0  overruns 0  frame 0
      TX packets 0  bytes 0 (0.0 B)
      TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

[root@strong ~]# ping www.baidu.com
ping: unknown host www.baidu.com
[root@strong ~]# cd /etc/sysconfig/network-scripts
[root@strong network-scripts]# ls
ifcfg-eno16777736  ifdown-ib ifdown-ppp    ifdown-tunnel  ifup-ib ifup-plusb ifup-Team       network-functions
ifcfg-lo          ifdown-ippp  ifdown-routes ifup          ifup-ippp  ifup-post ifup-TeamPort    network-functions-ipv6
ifdown          ifdown-ipv6  ifdown-sit    ifup-aliases ifup-ipv6  ifup-ppp    ifup-tunnel
ifdown-bnep       ifdown-isdn  ifdown-Team    ifup-bnep    ifup-isdn  ifup-routes  ifup-wireless
ifdown-eth       ifdown-post  ifdown-TeamPort  ifup-eth    ifup-plip  ifup-sit    init.ipv6-global
[root@strong network-scripts]# cat ifcfg-eno16777736
TYPE="Ethernet"
BOOTPROTO="static"
DEFROUTE="yes"
IPV4_FAILURE_FATAL="no"
IPV6INIT="yes"
IPV6_AUTOCONF="yes"
IPV6_DEFROUTE="yes"
IPV6_FAILURE_FATAL="no"
NAME="eno16777736"
UUID="dea7dad7-4f58-4d71-8ee5-ed059a21ce98"
DEVICE="eno16777736"
ONBOOT="yes"
IPADDR="192.168.133.131"
PREFIX="24"
GATEWAY="192.168.133.1"
DNS1="8.8.8.8"
IPV6_PEERDNS="yes"
IPV6_PEERROUTES="yes"
IPV6_PRIVACY="no"

[root@localhost ~]# systemctl status firewalld
● firewalld.service - firewalld - dynamic firewall daemon
Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled)
Active: active (running) since 五 2018-01-19 17:01:14 CST; 8min ago
Main PID: 1016 (firewalld)
CGroup: /system.slice/firewalld.service
         └─1016 /usr/bin/python -Es /usr/sbin/firewalld --nofork --nopid

1月 19 17:00:56 localhost.localdomain systemd[1]: Starting firewalld - dynamic firewall daemon...
1月 19 17:01:14 localhost.localdomain systemd[1]: Started firewalld - dynamic firewall daemon.
[root@localhost ~]#  systemctl stop firewalld
[root@localhost ~]#  systemctl disable  firewalld

[root@strong network-scripts]# cat /etc/resolv.conf
# Generated by NetworkManager
nameserver 8.8.8.8

[root@strong network-scripts]# service network restart
Restarting network (via systemctl):                      [  确定  ]

确保DNS解析
[root@strong ~]# grep hosts /etc/nsswitch.conf
#hosts:    db files nisplus nis dns
hosts:    files dns

然后ping: www.baidu.com,还是ping不通，在网上找到了以下这个解决方案还是不行。
[root@strong ~]# ping www.baidu.com
ping: unknown host www.baidu.com

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