Date: Wed, 16 Jul 2008 21:06:33 -0700 From: Chuck Swiger <cswiger@mac.com> To: Eugene Grosbein <eugen@kuzbass.ru> Cc: stable@freebsd.org Subject: Re: named.conf: query-source address Message-ID: <8DFF6DCD-6619-4251-9944-59CED8DF1B19@mac.com> In-Reply-To: <20080717035155.GA81536@svzserv.kemerovo.su> References: <20080716162042.GA27666@svzserv.kemerovo.su> <487E312E.9090307@infracaninophile.co.uk> <20080717035155.GA81536@svzserv.kemerovo.su>
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On Jul 16, 2008, at 8:51 PM, Eugene Grosbein wrote: > On Wed, Jul 16, 2008 at 06:34:38PM +0100, Matthew Seaman wrote: >> The 'query-source' options don't have to be specified: the system >> will just choose some appropriate address according to the state of >> the routing table. 'query-source' to set the source /IP/ is really >> only useful in some specific server configurations with several alias >> addresses any of which could be used. That's pretty rare really. > > Isn't this common to have multiple aliases at an interface? > Sometimes only one of them should be used for all DNS traffic. About the only common reason to set up multiple aliases on an interface is when you're doing something like hosting multiple SSL webservers on a single box which actually need to have distinct IPs as a consequence. Other than that, using public IPs for aliases is usually wasteful of IP address space. YMMV... Regards, -- -Chuck
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