I agree. I've been using QuickDNS Pro on a Quadra 660AV (with a Quadra 840av for secondary) for well over a year now and have never had any problems.A friend of mine switched to using Macs for DNS after having his Irix boxen hacked through DNS.
My IRIX 6.5.4 box has one port open: 80. :) DNS on IRIX was always a bit..uh.."holey" to say the least. Besides, why waste a cool SGI box on DNS? :)
A G4 would be overkill for DNS. You can pick up a beige G3/266 fairly cheap these days. :)I sugested the G4 because it's available in a retail outlet, and because it's much cheaper to rackmount than any of the beige macs. The G4 basically needs only some ears that replaces the "carrying handles". An 1U irack (based on the iMac logic board) would be perfect for this job.
Yeah! I saw those cases at the Marathon booth at Macworld.
As a side note, one soul on the list mentioned that Dantz were in the process of bringing Retrospect clients for linux. If/when it becomes available, you might be able to use the DNS server as a backup server. One should check if QuickDNS would be able to respond while Retrospect was running before setting that up on the production servers, though.
Retrospect for Linux would sell like hotcakes. I'd LOVE to see a version of that. :)