On 14/06/13 15:27, Manson, John wrote: > We are running Bind 9.9.2 and would like to invoke the rate-limit option > but named says ‘unknown option’. > > Do we need to upgrade bind to get this option? You need to apply the patches here: http://ss.vix.su/~vjs/rrlrpz.html It's not built into bind (yet).