redhat問題：能ping通網關和本網段的IP，但是不能ping通DNS，也不能上網

(2011-12-20 06:11:51)

標簽：

上網

雜談

redhat問題：能ping通網關和本網段的IP，但是不能ping通DNS，也不能上網查看路由的信息如下：

輸入netstat -nr 后只顯示如下信息

[root@machine1 /]$ netstat -nr

Kernel IP routing table

Destination Gateway Genmask Flags MSS

192.168.28.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0

是不是路由設置不多還是什么，也沒有看到default gateway

還請高手解答一下，謝謝！樓主是不是網卡沒設置網關?[b]回復 [i]chenyx[/i] [/b]

我也不知道，怎么知道網卡是否設置了網關?

但是我ping網關是可以通的阿cat /etc/sysconfig/network-scripts/ifcfg-eth0

貼下

[b]回復 [i]chenyx[/i] [/b]

[root@S093 ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0

BOOTPROTO=none

BROADCAST=192.168.28.255

HWADDR=**

IPADDR=192.168.28.64

NETMASK=255.255.255.0

NETWORK=192.168.28.0

ONBOOT=yes

TYPE=Ethernet

USERCTL=no

IPV6INIT=no

PEERDNS=no

GATEWAY=192.168.28.1

DHCP_HOSTNAME=S093

[root@S093 ~]#DHCP_HOSTNAME=S093,去掉,重啟下network服務看看

要是還沒有,cat /etc/sysconfig/network,看看有沒有GATEWAY的行[b]回復 [i]chenyx[/i]

[/b]

去掉了還是不行，在network里面加上GATEWAY=192.168.28.1也是不行挺奇怪的.

你試試用命令添加網關看看.

ip route add default gw 192.168.28.1[b]回復 [i]chenyx[/i] [/b]

不行，提示如下信息

[root@S093 ~]# ip route add default gw 192.168.28.1

Error: either "to" is duplicate,

or "gw" is a garbage.

[root@S093 ~]#ip route add default via 192.168.28.1

換這個[b]回復 [i]chenyx[/i] [/b]

還是不行

[root@S093 ~]# ip route add default gw 192.168.28.1

Error: either "to" is duplicate,

or "gw" is a garbage.

[root@S093 ~]#

[root@S093 ~]# ip route add 0.0.0.0/0 via 192.168.28.1

RTNETLINK answers: Invalid argument

[root@S093 ~]# ip route show

192.168.28.0/24 dev eth0proto kernelscope linksrc

192.168.28.64

[root@S093 ~]# ip route add 192.168.28.0/24 via 192.168.28.1

RTNETLINK answers: Invalid argument

[root@S093 ~]#

[root@S093 ~]# ip route add default via 192.168.28.1

RTNETLINK answers: Invalid argument

[root@S093 ~]#樓主service network restart重啟下network服務看看

你的現象太詭異了[b]回復 [i]chenyx[/i] [/b]

可以上網了，折騰了一晚上，非常感謝chenyx！紀梵希！！[b]回復 [i]lhm1003[/i] [/b]

怎么解決的,把解決過程寫出來[b]回復 [i]chenyx[/i] [/b]

就是按照你說的service network restart重啟下network服務就可以了[b]回復 [i]lhm1003[/i]

[/b]

如果是能ping通網關和本網段的IP，但是不能ping通DNS，也不能上網，

需要再service network restart重啟下network服務就可以ping通DNS和上網了。

不知道這是為什么呢？不清楚.

樓主重啟下系統,看看是否正常[b]回復 [i]chenyx[/i] [/b]

重啟之后還是不能上網，必須service network restart后就可以上網了，不知道為什么？那確實挺詭異.

樓主檢查下系統日志,看看網卡啟動的時候有什么狀況[b]回復 [i]chenyx[/i] [/b]

重啟之后看boot.log里面的文件內容，好像看不出什么異常

May8 21:25:38 S093 cups-config-daemon: cups-config-daemon -TERM

succeeded

May8 21:25:38 S093 haldaemon: haldaemon -TERM succeeded

May8 21:25:38 S093 messagebus: messagebus -TERM succeeded

May8 21:25:38 S093 atd: atd shutdown succeeded

May8 21:25:38 S093 cups: cupsd shutdown succeeded

May8 21:25:38 S093 xfs: xfs shutdown succeeded

May8 21:25:38 S093 canna: Stopping Canna server: succeeded

May8 21:25:38 S093 gpm: gpm shutdown succeeded

May8 21:25:38 S093 sshd: sshd -TERM succeeded

May8 21:25:38 S093 sendmail: sendmail shutdown succeeded

May8 21:25:39 S093 sendmail: sm-client shutdown succeeded

May8 21:25:39 S093 smb: smbd shutdown succeeded

May8 21:25:39 S093 smb: nmbd shutdown succeeded

May8 21:25:39 S093 vsftpd: vsftpd shutdown succeeded

May8 21:25:39 S093 xinetd: xinetd shutdown succeeded

May8 21:25:39 S093 acpid: acpid shutdown succeeded

May8 21:25:39 S093 crond: crond shutdown succeeded

May8 21:25:39 S093 netfs: Unmounting SMB

filesystems:succeeded

May8 21:25:39 S093 nfslock: rpc.statd shutdown succeeded

May8 21:25:40 S093 irqbalance: irqbalance shutdown succeeded

May8 21:25:40 S093 portmap: portmap shutdown succeeded

May8 21:28:14 S093 syslog: syslogd startup succeeded

May8 21:28:14 S093 syslog: klogd startup succeeded

May8 21:28:14 S093 irqbalance: irqbalance startup succeeded

May8 21:28:14 S093 portmap: portmap startup succeeded

May8 21:28:15 S093 nfslock: rpc.statd startup succeeded

May8 21:28:15 S093 rpcidmapd: rpc.idmapd startup succeeded

May8 21:28:15 S093 netfs: Mounting other

filesystems:succeeded

May8 21:28:15 S093 rc: Starting lm_sensors:succeeded

May8 21:28:15 S093 autofs: automount startup succeeded

May8 21:28:15 S093 acpid: acpid startup succeeded

May8 21:28:15 S093 rc: Starting hpoj:succeeded

May9 05:27:17 S093 rc.sysinit: -e

May9 05:27:18 S093 start_udev: Starting udev:succeeded

May9 05:27:23 S093 rc.sysinit: -e

May9 05:27:28 S093 sysctl: net.ipv4.ip_forward = 0

May9 05:27:28 S093 sysctl: net.ipv4.conf.default.rp_filter =

1

May9 05:27:28 S093 sysctl:

net.ipv4.conf.default.accept_source_route = 0

May9 05:27:28 S093 sysctl: kernel.sysrq = 0

May9 05:27:28 S093 sysctl: kernel.core_uses_pid = 1

May9 05:27:28 S093 rc.sysinit: Configuring kernel

parameters:succeeded

May8 21:27:28 S093 date: Sun May8 21:27:28 CST 2011

May8 21:27:28 S093 rc.sysinit: Setting clock(localtime): Sun May8

21:27:28 CST 2011 succeeded

May8 21:27:28 S093 rc.sysinit: Loading default keymap

succeeded

May8 21:27:28 S093 rc.sysinit: Setting hostname

S093:succeeded

May8 21:27:28 S093 rc.sysinit: Checking root filesystem

succeeded

May8 21:27:28 S093 rc.sysinit: Remounting root filesystem in

read-write mode:succeeded

May8 21:27:28 S093 lvm.static: No volume groups found

May8 21:27:28 S093 rc.sysinit: Setting up Logical Volume

Management: succeeded

May8 21:27:28 S093 rc.sysinit: Checking filesystems succeeded

May8 21:27:28 S093 rc.sysinit: Mounting local

filesystems:succeeded

May8 21:27:28 S093 rc.sysinit: Enabling local filesystem

quotas:succeeded

May8 21:27:29 S093 rc.sysinit: Enabling swap space:succeeded

May8 21:27:29 S093 microcode_ctl: microcode_ctl startup

succeeded

May8 21:27:29 S093 sysstat: Calling the system activity data

collector (sadc):

May8 21:27:29 S093 sysstat:

May8 21:27:29 S093 rc: Starting sysstat:succeeded

May8 21:27:29 S093 readahead_early: Starting background

readahead:

May8 21:27:30 S093 rc: Starting readahead_early:succeeded

May8 21:28:10 S093 kudzu:failed

May8 21:28:10 S093 kudzu: Hardware configuration timed out.

May8 21:28:10 S093 kudzu: Run '/usr/sbin/kudzu' from the command

line to re-detect.

May8 21:28:10 S093 rc: Starting pcmcia:succeeded

May8 21:28:10 S093 sysctl: net.ipv4.ip_forward = 0

May8 21:28:10 S093 sysctl: net.ipv4.conf.default.rp_filter =

1

May8 21:28:10 S093 sysctl:

net.ipv4.conf.default.accept_source_route = 0

May8 21:28:10 S093 sysctl: kernel.sysrq = 0

May8 21:28:10 S093 sysctl: kernel.core_uses_pid = 1

May8 21:28:10 S093 network: Setting network

parameters:succeeded

May8 21:28:10 S093 network: Bringing up loopback

interface:succeeded

May8 21:28:14 S093 network: Bringing up interface

eth0:succeeded

May8 21:28:17 S093 cups: cupsd startup succeeded

May8 21:28:17 S093 sshd:succeeded

May8 21:28:18 S093 xinetd: xinetd startup succeeded

May8 21:28:18 S093 vsftpd: vsftpd vsftpd succeeded

May8 21:28:18 S093 sendmail: sendmail startup succeeded

May8 21:28:18 S093 sendmail: sm-client startup succeeded

May8 21:28:18 S093 gpm: gpm startup succeeded

May8 21:28:19 S093 iiim: htt startup succeeded

May8 21:28:20 S093 canna:succeeded

May8 21:28:20 S093 crond: crond startup succeeded

May8 21:28:21 S093 xfs: xfs startup succeeded

Ma

分享：

喜歡

0

贈金筆

加載中，請稍候......

評論加載中，請稍候...

發評論

登錄名： 密碼： 找回密碼 注冊記住登錄狀態

昵???稱：

評論并轉載此博文

發評論

以上網友發言只代表其個人觀點，不代表新浪網的觀點或立場。

總結

以上是生活随笔為你收集整理的linux可平通网关但不能上网,redhat问题：能ping通网关和本网段的IP，但是不能ping通DNS，也不能上网...的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。