Eugene M. Kim wrote:
> Greetings,
>
> I am running a VPN gateway, where interfaces come and go frequently. I
> set up BIND so that it listens on all interfaces.
> It seems that, instead of listening on a wildcard IPv4 address (*:53,
> that is), BIND monitors for address changes on all interfaces and
> creates a separate listening socket for each address (note that IPv6
> uses the wildcard address, but IPv4 does not):
I suspect that you are using something like "listen-on-v6 { any; };"
in which case this is normal behavior.
> Then, when a new address comes up (such as on a dynamically created L2TP
> tun(4) interface), BIND tries to listen on it, but fails because it is
> running setuid as bind:
That is also normal behavior.
> The only workarounds that I can think of is either to run BIND as setuid
> root, or to restart (not reload) BIND every time a new VPN connection
> comes up, both of which I am not comfortable with.
>
> Any better ideas?
Nope, sorry. That is how it works.
Doug
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