Search Again: Re: Sanity check on SOA values From: Len Conrad Date: Friday, May 24, 2002 Time: 11:22:37 am >refresh 3 hours refresh is only an SOA query from slave to master, so it's never expensive, but since NOTIFY (master to slave) has become standard, the refresh timeout is mostly moot these days. >retry 1 hour 15m is reasonable, your slve is in kind of a "panic" mode since the master is not responding. 15m to repeat an SOA is a decent expression of panic. :)) >expire 1 hour ... 7 or 10 days is more common >minimum 1 day negative TTL of 1 to 3 hours should be sufficient to keep you from getting hammered. If you've made an error that causes the nxdomain, then 1d is too punitive and too long. But if the users are eronneously hammering your DNS, then 1 to 3 hours is enough to reduce the hammmering. Len ___________________________________________________________________ Men & Mice: QuickDNS - DNS Expert - DNS Training & Consulting DNS Class: Atlanta 05/21-23 Chicago 06/4-5 New York 06/18-19 www.MenAndMice.com/DNS-training/

Messages In This Thread: Sanity check on SOA values by David M. Dantowitz on May 23, 2002 at 10:43:25 am Re: Sanity check on SOA values by Men & Mice Support on May 23, 2002 at 2:47:36 pm Re: Sanity check on SOA values by David M. Dantowitz on May 23, 2002 at 3:22:25 pm Re: Sanity check on SOA values by Men & Mice Support on May 24, 2002 at 10:37:26 am Re: Sanity check on SOA values by Global Homes Webmaster on May 24, 2002 at 11:07:29 am Re: Sanity check on SOA values by Len Conrad on May 24, 2002 at 11:22:37 am Re: Sanity check on SOA values by David M. Dantowitz on May 27, 2002 at 7:03:37 pm