Slow recursive lookups

[MediaServe]

We have installed DirectAdmin on two NOC servers who need to provide recursive lookups. The problem is that the recursive lookups are very slow for uncached domains.

;; Query time: 4025 msec

For cached domains (the second lookup for the same domain) the speed is normal.

Any tips how to speed this up?

 

[nobaloney]

DA has nothing to do with how long it takes to resolve DNS lookups.

You should check your /etc/resolv.conf file to make sure the first nameserver in it works. Otherwise you're waiting the timeout period before your local resolver will check the next nameserver.

Jeff

 

[MediaServe]

Hi Jeff,

Thanks for your reply. I think you misunderstood the problem. In this case DirectAdmin is the resolving DNS server. These two NOC servers (with DirectAdmin) have to do all recursive DNS lookups for all other servers in the network.

The resolv.conf file on the two NOC servers have localhost as the only nameserver. All servers in our network have the two NOC servers in the resolv.conf

 

[MediaServe]

Hi all,

Problem is solved by disabling BIND for the specific IP address and installing Power DNS Recursor on that IP address.