有人在我们的networking中的一台机器上托pipe的虚拟机上安装并configuration了Ubuntu。 我最近注意到，所有的DNS查找失败，但我无法find一个解决scheme。 我已经尝试了大量的名称服务器，从谷歌的build议编辑接口文件100的时代，但没有任何工作。
以下是一些信息，如果有人有任何想法，我将不胜感激。 谢谢
NSLOOKUP
administrator@redmine:~$ nslookup google.com ;; connection timed out; no servers could be reached administrator@redmine:~$ nslookup localhost ;; connection timed out; no servers could be reached nslookup的tcpdump [需要3次查找才能获得任何tcpdump输出] – 编辑
administrator@redmine:~$ sudo tcpdump -vvv -i any port 53 tcpdump: listening on any, link-type LINUX_SLL (Linux cooked), capture size 96 bytes 10:26:51.965297 IP (tos 0x0, ttl 64, id 9167, offset 0, flags [none], proto UDP (17), length 56) 10.80.15.5.56365 > 208.67.222.222.domain: [bad udp cksum 988f!] 61133+ A? google.com. (28) 10:26:51.965595 IP (tos 0x0, ttl 64, id 25587, offset 0, flags [DF], proto UDP (17), length 73) 10.80.15.5.57551 > 208.67.222.222.domain: [bad udp cksum ff0c!] 9477+ PTR? 222.222.67.208.in-addr.arpa. (45) 10:26:52.965437 IP (tos 0x0, ttl 64, id 37960, offset 0, flags [none], proto UDP (17), length 56) 10.80.15.5.45006 > 208.67.220.220.domain: [bad udp cksum fbbf!] 61133+ A? google.com. (28) 10:26:56.967724 IP (tos 0x0, ttl 64, id 26087, offset 0, flags [DF], proto UDP (17), length 73) 10.80.15.5.38794 > 208.67.220.220.domain: [bad udp cksum 485a!] 9477+ PTR? 222.222.67.208.in-addr.arpa. (45) 10:26:57.965482 IP (tos 0x0, ttl 64, id 9168, offset 0, flags [none], proto UDP (17), length 56) 10.80.15.5.56365 > 208.67.222.222.domain: [bad udp cksum 988f!] 61133+ A? google.com. (28) 10:26:58.965605 IP (tos 0x0, ttl 64, id 37961, offset 0, flags [none], proto UDP (17), length 56) 10.80.15.5.45006 > 208.67.220.220.domain: [bad udp cksum fbbf!] 61133+ A? google.com. (28) 10:27:01.972798 IP (tos 0x0, ttl 64, id 25588, offset 0, flags [DF], proto UDP (17), length 73) 10.80.15.5.57551 > 208.67.222.222.domain: [bad udp cksum ff0c!] 9477+ PTR? 222.222.67.208.in-addr.arpa. (45) 10:27:03.965726 IP (tos 0x0, ttl 64, id 9169, offset 0, flags [none], proto UDP (17), length 56) 10.80.15.5.56365 > 208.67.222.222.domain: [bad udp cksum 988f!] 61133+ A? google.com. (28) 10:27:04.965844 IP (tos 0x0, ttl 64, id 37962, offset 0, flags [none], proto UDP (17), length 56) 10.80.15.5.45006 > 208.67.220.220.domain: [bad udp cksum fbbf!] 61133+ A? google.com. (28) 10:27:06.974911 IP (tos 0x0, ttl 64, id 26088, offset 0, flags [DF], proto UDP (17), length 73) 10.80.15.5.38794 > 208.67.220.220.domain: [bad udp cksum 485a!] 9477+ PTR? 222.222.67.208.in-addr.arpa. (45) 10:27:11.255383 IP (tos 0x0, ttl 64, id 9170, offset 0, flags [none], proto UDP (17), length 56) 10.80.15.5.46416 > 208.67.222.222.domain: [bad udp cksum 1dab!] 64037+ A? google.com. (28) 10:27:11.980136 IP (tos 0x0, ttl 64, id 27588, offset 0, flags [DF], proto UDP (17), length 69) 10.80.15.5.41940 > 208.67.222.222.domain: [bad udp cksum 12f8!] 57952+ PTR? 5.15.80.10.in-addr.arpa. (41) 10:27:12.255497 IP (tos 0x0, ttl 64, id 37963, offset 0, flags [none], proto UDP (17), length 56) 10.80.15.5.34434 > 208.67.220.220.domain: [bad udp cksum efdd!] 64037+ A? google.com. (28) 10:27:16.983093 IP (tos 0x0, ttl 64, id 28089, offset 0, flags [DF], proto UDP (17), length 69) 10.80.15.5.33410 > 208.67.220.220.domain: [bad udp cksum 691d!] 57952+ PTR? 5.15.80.10.in-addr.arpa. (41) 10:27:17.255564 IP (tos 0x0, ttl 64, id 9171, offset 0, flags [none], proto UDP (17), length 56) 10.80.15.5.46416 > 208.67.222.222.domain: [bad udp cksum 1dab!] 64037+ A? google.com. (28) 10:27:18.255675 IP (tos 0x0, ttl 64, id 37964, offset 0, flags [none], proto UDP (17), length 56) 10.80.15.5.34434 > 208.67.220.220.domain: [bad udp cksum efdd!] 64037+ A? google.com. (28) 10:27:21.988171 IP (tos 0x0, ttl 64, id 27589, offset 0, flags [DF], proto UDP (17), length 69) 10.80.15.5.41940 > 208.67.222.222.domain: [bad udp cksum 12f8!] 57952+ PTR? 5.15.80.10.in-addr.arpa. (41) 10:27:23.255805 IP (tos 0x0, ttl 64, id 9172, offset 0, flags [none], proto UDP (17), length 56) 10.80.15.5.46416 > 208.67.222.222.domain: [bad udp cksum 1dab!] 64037+ A? google.com. (28) 10:27:24.255925 IP (tos 0x0, ttl 64, id 37965, offset 0, flags [none], proto UDP (17), length 56) 10.80.15.5.34434 > 208.67.220.220.domain: [bad udp cksum efdd!] 64037+ A? google.com. (28) 10:27:26.991768 IP (tos 0x0, ttl 64, id 28090, offset 0, flags [DF], proto UDP (17), length 69) 10.80.15.5.33410 > 208.67.220.220.domain: [bad udp cksum 691d!] 57952+ PTR? 5.15.80.10.in-addr.arpa. (41) 10:27:31.165191 IP (tos 0x0, ttl 64, id 9173, offset 0, flags [none], proto UDP (17), length 56) 10.80.15.5.47147 > 208.67.222.222.domain: [bad udp cksum 55b3!] 61202+ A? google.com. (28) 10:27:31.997034 IP (tos 0x0, ttl 64, id 29590, offset 0, flags [DF], proto UDP (17), length 73) 10.80.15.5.37414 > 208.67.222.222.domain: [bad udp cksum 3353!] 11646+ PTR? 220.220.67.208.in-addr.arpa. (45) 10:27:32.165303 IP (tos 0x0, ttl 64, id 37966, offset 0, flags [none], proto UDP (17), length 56) 10.80.15.5.57432 > 208.67.220.220.domain: [bad udp cksum 2c8f!] 61202+ A? google.com. (28) 10:27:36.999487 IP (tos 0x0, ttl 64, id 30090, offset 0, flags [DF], proto UDP (17), length 73) 10.80.15.5.34374 > 208.67.220.220.domain: [bad udp cksum 1763!] 11646+ PTR? 220.220.67.208.in-addr.arpa. (45) 10:27:37.165381 IP (tos 0x0, ttl 64, id 9174, offset 0, flags [none], proto UDP (17), length 56) 10.80.15.5.47147 > 208.67.222.222.domain: [bad udp cksum 55b3!] 61202+ A? google.com. (28) 10:27:38.165507 IP (tos 0x0, ttl 64, id 37967, offset 0, flags [none], proto UDP (17), length 56) 10.80.15.5.57432 > 208.67.220.220.domain: [bad udp cksum 2c8f!] 61202+ A? google.com. (28) 10:27:42.004572 IP (tos 0x0, ttl 64, id 29591, offset 0, flags [DF], proto UDP (17), length 73) 10.80.15.5.37414 > 208.67.222.222.domain: [bad udp cksum 3353!] 11646+ PTR? 220.220.67.208.in-addr.arpa. (45) 10:27:43.165623 IP (tos 0x0, ttl 64, id 9175, offset 0, flags [none], proto UDP (17), length 56) 10.80.15.5.47147 > 208.67.222.222.domain: [bad udp cksum 55b3!] 61202+ A? google.com. (28) 10:27:44.165729 IP (tos 0x0, ttl 64, id 37968, offset 0, flags [none], proto UDP (17), length 56) 10.80.15.5.57432 > 208.67.220.220.domain: [bad udp cksum 2c8f!] 61202+ A? google.com. (28) 10:27:47.009170 IP (tos 0x0, ttl 64, id 30091, offset 0, flags [DF], proto UDP (17), length 73) 10.80.15.5.34374 > 208.67.220.220.domain: [bad udp cksum 1763!] 11646+ PTR? 220.220.67.208.in-addr.arpa. (45)
/ etc / hosts文件
administrator@redmine:~$ cat /etc/hosts 127.0.0.1 localhost localhost.localdomain redmine redmine.hiddendomain.com
在/etc/resolv.conf
administrator@redmine:~$ cat /etc/resolv.conf ### OPENDNS ### nameserver 208.67.222.222 nameserver 208.67.220.220 ### GOOGLE NS ### #nameserver 8.8.8.8 #nameserver 8.8.4.4
的/ etc /networking/接口
administrator@redmine:~$ cat /etc/network/interfaces # This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5). # The loopback network interface auto lo iface lo inet loopback #The primary network auto eth0 iface eth0 inet static address 10.80.15.5 netmask 255.255.255.0 network 10.80.15.0 broadcast 10.80.15.255 gateway 10.80.15.254 ## Try this just in case resolv.conf isn't being read properly dns-nameserver 8.8.8.8
/etc/nsswitch.conf中
cat /etc/nsswitch.conf # /etc/nsswitch.conf # # Example configuration of GNU Name Service Switch functionality. # If you have the `glibc-doc-reference' and `info' packages installed, try: # `info libc "Name Service Switch"' for information about this file. passwd: compat group: compat shadow: compat hosts: files dns networks: files protocols: db files services: db files ethers: db files rpc: db files netgroup: nis
是/etc/host.conf
multi on
我可以但是telnet，所以它不是一个防火墙（但你已经知道从tcpdump）
administrator@redmine:~$ telnet 8.8.8.8 53 Trying 8.8.8.8... Connected to 8.8.8.8. Escape character is '^]'. Connection closed by foreign host.
更新：感谢ladadada *发现我愚蠢的错误。 但现在我回到我原来的问题。 它使用正确的DNS服务器（你可以从tcpdump中看到），但nslookup / dig仍然说没有服务器可以到达。 我已经testing，我可以在端口53 telnet到两个opendns服务器。 一个奇怪的是，我必须运行nslookup 3次之前，我从tcpdump的任何输出，前2个查找没有输出任何东西通过tcpdump（不知道如果这是相关的）。
再次，任何帮助，build议，等将不胜感激。
你的/etc/resolv.conf应该是这样的：
### OPENDNS ### nameserver 208.67.222.222 nameserver 208.67.220.220 ### GOOGLE NS ### #nameserver 8.8.8.8 #nameserver 8.8.4.4
没有nameserver关键字，IP地址本身并不意味着什么。