TIPS for small ISP DNS

[Hagforce]

Hello

I have been using my web server for DNS and the transit providers DNS for secondary.
But I see that when there is load on the server, DNS requests take more time that it should.

This DNS will be serving 1000-1500 ADSL and Wireless broadband coustomers.

I need as high performance as possible on this.

So I would like tips on
-Hardware
-Software
-Setup

[falko]

What other services are running on that server? Which one is consuming the most resources (see top)?

[Hagforce]

It`s mostly spamassasin and clam that is putting load on the server.
I use these through ISPConfig.

So I think the best ting would be to use a separate DNS server, as from time to time load would be high om web/mail server. And the DNS response for ADSL customers would be slow.

[falko]

It`s mostly spamassasin and clam that is putting load on the server.
I use these through ISPConfig.You can try to use spamd and clamd (there are some forum threads about this), this should decrease the load.

So I think the best ting would be to use a separate DNS server, as from time to time load would be high om web/mail server. And the DNS response for ADSL customers would be slow.That would be the best solution. :)

[Hagforce]

Thank you Falko.

Any good setup guides for a DNS server for ADSL ISP use?
Superfast for best surfing experience :D

[falko]

Take a look at the DNS category: http://www.howtoforge.com/howtos/dns :)