緊急求助!奇怪的unknown host 問題
Linux A3的操作系統,用作Email伺服器,工作一年半一直正常,今天早上起,突然不能發送郵件。
檢查一番之後,發現問題如下:
# ping msn.com
ping: unknown host msn.com
# hostname
GMS
# nslookup msn.com
Server: 202.96.209.5
Address: 202.96.209.5#53
Non-authoritative answer:
*** Can't find msn.com: No answer
reslove.conf 內容
# cat /etc/resolv.conf
nameserver 202.96.209.5
nameserver 202.96.199.133
nameserver 203.95.1.1
# ping 202.96.209.5
PING 202.96.209.5 (202.96.209.5) 56(84) bytes of data.
64 bytes from 202.96.209.5: icmp_seq=0 ttl=244 time=29.2 ms
64 bytes from 202.96.209.5: icmp_seq=1 ttl=244 time=29.3 ms
64 bytes from 202.96.209.5: icmp_seq=2 ttl=244 time=29.7 ms
--- 202.96.209.5 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2022ms
rtt min/avg/max/mdev = 29.202/29.425/29.722/0.294 ms, pipe 2
# cat /etc/nsswitch.conf
#
# /etc/nsswitch.conf
#
# An example Name Service Switch config file. This file should be
# sorted with the most-used services at the beginning.
#
# The entry '' means that the search for an
# entry should stop if the search in the previous entry turned
# up nothing. Note that if the search failed due to some other reason
# (like no NIS server responding) then the search continues with the
# next entry.
#
# Legal entries are:
#
# nisplus or nis+ Use NIS+ (NIS version 3)
# nis or yp Use NIS (NIS version 2), also called YP
# dns Use DNS (Domain Name Service)
# files Use the local files
# db Use the local database (.db) files
# compat Use NIS on compat mode
# hesiod Use Hesiod for user lookups
# Stop searching if not found so far
#
# To use db, put the "db" in front of "files" for entries you want to be
# looked up first in the databases
#
# Example:
#passwd: db files nisplus nis
#shadow: db files nisplus nis
#group: db files nisplus nis
passwd: files
shadow: files
group: files
#hosts: db files nisplus nis dns
hosts: files dns
# Example - obey only what nisplus tells us...
#services: nisplus files
#networks: nisplus files
#protocols: nisplus files
#rpc: nisplus files
#ethers: nisplus files
#netmasks: nisplus files
bootparams: nisplus files
ethers: files
netmasks: files
networks: files
protocols: files
rpc: files
services: files
netgroup: files
publickey: nisplus
automount: files
aliases: files nisplus
# cat /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 GMS localhost.localdomain localhost
# cat /etc/host.conf
order hosts,bind
請各位大能幫忙看看到底問題出在哪裡了?謝謝
[ 本帖最後由 steelskin 於 2007-6-25 18:41 編輯 ]
《解決方案》
是不是我發錯區了?能否請斑竹幫我轉移到正確的區中。謝啦
《解決方案》
去掉這個:
nameserver 202.96.209.5
202.96.209.5有問題
《解決方案》
真的是這個IP產生的問題。已經解決了。但是,我在windows下,用nslookup, server 202.96.209.5,能正常解析出域名啊。詭異