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DNS Problem

 
NFPC
Occasional Visitor

DNS Problem

Hi,
I have a two unix servers that act as a primary and a secondary dns server. For the past few days, I have had problems gettig to msn.com or hotmail.com. All other sites work without any problems.
Any idea what is going on ?
Thanks
A/A
9 REPLIES
Ganesan R
Honored Contributor

Re: DNS Problem

Hi,

It may not be your DNS server issue. Normaly hosts outside your network will be resolved by caching domain server.

Name resolution works this way. The
resolver forwards all host name resolution queries to the domain name server. The name server looks into its own data files for a match. If a match is found, the query is answered straight away. If no match is found, the name server contacts a root name server on the Internet. The root name
server provides the address of another DNS that can resolve the host name. Your name server then contacts the name server address provided by the root name server. When it receives the IP address of the host, it relays the address back to the querying machine.

Here Primary DNS or Secondary DNS cannot do anything if clients are not able to resolve msn.com or hotmail.com
Best wishes,

Ganesh.
Steven E. Protter
Exalted Contributor

Re: DNS Problem

Shalom,

dig command has diagnostic tools built in.

Use those tools to run verbose lookups on the servers themselves.

dig @server name type

See the man page for more information.

This problem is probably not the HP-UX Server, more likely a problem at your ISP.

Seeing error codes would help.

SEP
Steven E Protter
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com
NFPC
Occasional Visitor

Re: DNS Problem

Thanks for the response.
I am not sure where to start to get this resolved...
Patrick Wallek
Honored Contributor

Re: DNS Problem

Check your /etc/named.conf file and look for the "Forwarders" section. The forwarders are the servers that your DNS server will forward requests that it can't handle to.

Try looking up msn.com and hotmail.com via each forwarder in your list.
NFPC
Occasional Visitor

Re: DNS Problem

There is no such section in the named.conf file on the primary dns server while as there is no named.conf in /etc directory in the secondary server.
Patrick Wallek
Honored Contributor

Re: DNS Problem

You **MUST** have a named.conf file somewhere on your secondary server. Perhaps in a different location?

Do you have a section in the primary named.conf that looks like:

include "forwarders.conf";

perhaps with some path to the forwarders.conf file?

The should be something there that tells DNS what to do with requests for servers it doesn't have records for.
NFPC
Occasional Visitor

Re: DNS Problem

no such reference to the file
Patrick Wallek
Honored Contributor

Re: DNS Problem

Do you have **ANY** include statements in your named.conf file?
NFPC
Occasional Visitor

Re: DNS Problem

none whatsoever..
this is how it looks like
directory /etc/named.data ; running directory for named
version 4.9.7
cache . db.cache
primary "domain Name" db.nfpc
primary 'Ip address'
secondary "domain Name" 192.1.1.16 db.nfpc
primary 'IP address"
db.127.0.0