Binding to non-local interfaces

Michael Graff mgraff at isc.org
Fri Oct 22 18:22:05 UTC 2010


Better yet hook into the system notifications and stop scanning at all. 

--Michael (from an iPhone)


On Oct 22, 2010, at 12:35, Terry Burton <tez at terryburton.co.uk> wrote:

> On Fri, Oct 22, 2010 at 5:46 PM, Michael Graff <mgraff at isc.org> wrote:
>> On 2010-10-22 11:21 AM, Terry Burton wrote:
>>> With the host-based examples that I have seen on Linux, VRRP runs
>>> between a set of hosts on the same VLAN and executes ip addr add/del
>>> with specified the virtual address parameters optionally followed by
>>> running a script. Hence IP addresses may spontaneously appear.
>> 
>> BIND does re-scan the local interfaces and will start listening on new
>> ones if configured to listen on all interfaces.
> 
> Understood, but I believe that the rescan time is of the order of minutes.
> 
>> I'm not quite certain of the behavior if a listen-on interface is being
>> added and removed dynamically.
> 
> listen-on appears to act as a filter on the available interfaces.
> 
> Perhaps a simpler solution would be an rndc rescan-interfaces
> directive which provides immediate results whist avoiding the cost of
> reloading the zones?



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