I also use loopback regularly if running a localhost resolver; in fact I use a script that goes as far as changing resolv.conf if it detects an interface address instead of loopback. [Our rules require listening on loopback minimally here]
If you do use it, I recommend you make sure you don't have "options rotate" set as that'll cause confusion as it's most likely not your intent if you're running a nameserver locally. On Mon, Jul 23, 2012 at 5:13 PM, John Miller <johnm...@brandeis.edu> wrote: > Hey there folks, > > I was just going back through the good ol' cricket book, and ran into the > following: > > "If you use multiple nameserver directives, don't use the loopback > address! There's a bug in some Berkeley-derived TCP/IP implementations > that can cause problems with BIND if the local nameserver is down. The > resolver's connected datagram socket won't rebind to a new local address if > the local nameserver isn't running, and consequently the resolver sends > query packets to the fallback remote nameservers with a source address of > 127.0.0.1. When the remote nameservers try to reply, they end up sending > the reply packets to themselves." > > Given that this same text is in the fourth edition of Cricket & Paul's > book as well, I'm assuming this was an old bug (pre-BIND 9) and has long > since been fixed. Could someone point me to a bug report and/or changelog > for this? A quick Google search for 'bind resolver source address bug' > didn't yield much. > > John > -- > John Miller > Systems Engineer > Brandeis University > 781-736-4619 > johnm...@brandeis.edu > > ______________________________**_________________ > Please visit > https://lists.isc.org/mailman/**listinfo/bind-users<https://lists.isc.org/mailman/listinfo/bind-users>to > unsubscribe from this list > > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/**listinfo/bind-users<https://lists.isc.org/mailman/listinfo/bind-users> >
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