Why don't DNS root servers answer?

Posted by JustTrying on Server Fault See other posts from Server Fault or by JustTrying
Published on 2012-11-19T10:14:13Z Indexed on 2012/11/19 11:11 UTC
Read the original article Hit count: 249

Filed under:

dns

|

dig

If I try to query a root server with dig, I never receive an answer.

For example the output for dig @b.root-servers.net www.ubuntu.com is

; <<>> DiG 9.8.1-P1 <<>> @b.root-servers.net www.ubuntu.com

; (1 server found)

;; global options: +cmd

;; connection timed out; no servers could be reached

But if I query other servers (the one of my ISP, or 8.8.8.8), they answer correctly. Why?

© Server Fault or respective owner

Related posts about dns

Master/Slave DNS setup vs. rsync'ed DNS servers

as seen on Server Fault - Search for 'Server Fault'
We currently have primary and secondary DNS servers on our corporate network. They are setup in a master/slave type setup, where the slave gets its DNS information from the master. I'm trying to figure out what the real advantage is for the master/slave setup instead of just setting up an automated… >>> More
Updating Windows DNS records from a remote windows DNS server

as seen on Server Fault - Search for 'Server Fault'
Does anyone know if it is possible for a windows 2003 DNS server to update the records for a domain so that it contains all the records of a domain of of a remotely based DNS server? Im almost certain that doesn't quite explain the problem so I shall illustrate with an example: We have two offices… >>> More
OpenVPN DNS: VPN DNS stomping local VPN

as seen on Super User - Search for 'Super User'
I've finally noodled with OpenVPN enough to get it working. Even better, I can mount samba drives, ping network machines through the TUN device, etc - it's all great. However, I'm noticing that if I have the directive: push "dhcp-option DNS 10.0.1.1" # Push our local DNS to clients Then some of… >>> More
Random DNS Client Issue with BIND9/Windows Server 2003 DNS

as seen on Stack Overflow - Search for 'Stack Overflow'
Within our office, we have a local server running DNS, for internal related "domains", (e.g. .internal, .office, .lan, .vpn, etc.). Randomly, only the hosts configured with those extensions will stop resolving on the Windows-based workstations. Sometimes it'll work for a couple weeks without issue… >>> More
DNS Tools - DNS and Few of its Concerning Terms and Tools

as seen on Article City - Search for 'Article City'
A DNS or Domain Name System lets you locate computers on a network or the Internet TCP/IP network by domain name. The DNS server sustains a database of domain names or host names along with their cor... [Author: Daisy Osbaldo - Computers and Internet - April 02, 2010] >>> More

Related posts about dig

dig and dig -x are answering different

as seen on Server Fault - Search for 'Server Fault'
I don't want the name provider to manage my records. I want to handle it myself. So I installed bind9 and made some configurations reading some articles and following some examples. bind didn't show any error after I created/edited the required files but; When I write `dig www.foo.com, I see the… >>> More
Installing dig on Debian

as seen on Super User - Search for 'Super User'
I've tried installing dig on Debian, but the apt-get utility doesn't seem to know what it is. Is it part of some larger set of packages? Where can I find this? >>> More
DIG command is hanging and not timing out as expected

as seen on Super User - Search for 'Super User'
I ran into the following issue by accident when playing around with the DIG command and testing some domain names. Why does DIG hang and not timeout after 10 seconds when executing the following: dig +tries=1 +tries=1 +retry=1 +time=5 +trace google.us.com DIG hangs for about 30 seconds instead… >>> More
dig works but dig +trace <domain_name> not working

as seen on Stack Overflow - Search for 'Stack Overflow'
In my local system i can't get the proper result of dig +trace , but dig works fine. I'm using Ubuntu 10.04 LTS version. I'll attach the result of dig and dig +trace along with this updates. dig +trace gmail.com ; << DiG 9.7.0-P1 << +trace gmail.com ;; global options: +cmd ;; Received… >>> More
Dig returns "status: REFUSED" for external queries?

as seen on Server Fault - Search for 'Server Fault'
I can't seem to work out why my DNS isn't working properly, if I run dig from the nameserver it functions correctly: # dig ungl.org ; <<>> DiG 9.5.1-P2.1 <<>> ungl.org ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR,… >>> More