Welcome to ISAserver.org

DNS Denied

Users viewing this topic: none

Logged in as: Guest

Printable Version

All Forums >> [ISA Server 2004 General ] >> Installation >> DNS Denied

Page: [1]

Message

<< Older Topic Newer Topic >>

DNS Denied - 13.Apr.2005 2:38:00 PM

jasonpandre

Posts: 55
Joined: 10.Mar.2005
From: London, UK
Status: offline

I am getting lots of DNS denied connection results in my log, from my two DNS servers to my web providers DNS server IPs. They appear in blocks of about 20. Any thoughts on the cause and solution?

Thanks

Jason

Post #: 1

Featured Links*

RE: DNS Denied - 14.Apr.2005 3:40:00 PM

tshinder

Posts: 50013
Joined: 10.Jan.2001
From: Texas
Status: offline

Hi Jason,

Do you have rules that allow the DNS connections to the ISP DNS servers?

Also, you should configure your DNS servers to perform recursion themselves, now that DNS cache poisoning is such a problem.

HTH,
Tom

(in reply to jasonpandre)

Post #: 2

RE: DNS Denied - 14.Apr.2005 11:25:00 PM

jasonpandre

Posts: 55
Joined: 10.Mar.2005
From: London, UK
Status: offline

Tom,
Thanks for your response. I feel priviliged that you'd help. What rule should I add to allow the DNS access? A DNS protocol allow btween the servers and DNS ip's?

Also I don't really understand the recursion suggestion. How would I achieve that?

Many thanks

Jason

(in reply to jasonpandre)

Post #: 3