Troubles with DNS

[Rodrigo Tavares]

Hello,

I'm using bind9 with linux server.

I have a proxy server running in my network, this
search a DNS in dns server (other machine). 

Sometimes, when I try to access a site come this
message in firefox:

In  attempts of request a URL:
http://www.desolation.org/

The follow error was found:

    Unable get the IP address through  host name
www.desolation.org 

The  DNS server returned:

    DNS Domain 'www.desolation.org' is invalid: Host
not found (authoritative). 

After I refresh many times the site come to screen
without errors.

Is there a error in my DNS Server ?

Best regards,

Faria


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