The other approach might be the up/down scripts on your ppp connection that will reconfigure the query-source(-v6) address as the connection is established or tore down.
Ondřej -- Ondřej Surý — ISC (He/Him) My working hours and your working hours may be different. Please do not feel obligated to reply outside your normal working hours. > On 10. 6. 2023, at 19:24, Ondřej Surý <ond...@isc.org> wrote: > > You are over-complicating things. If unconfigured, named binds the outgoing > UDP to 0.0.0.0 (::0), which means the chosen IP address is picked by the > kernel. You need to configure priorities on your interfaces in the kernel - > ip route is your friend. > > And for goddess’ sake, don’t do anything wild like proposed round robin > across default routes. That would be a living hell to debug. > > Ondřej > -- > Ondřej Surý — ISC (He/Him) > > My working hours and your working hours may be different. Please do not feel > obligated to reply outside your normal working hours. > >> On 10. 6. 2023, at 18:55, Alessandro Vesely <ves...@tana.it> wrote: >> >> On Fri 09/Jun/2023 18:32:25 +0200 Anand Buddhdev wrote: >>>>> On 09/06/2023 17:26, Alessandro Vesely wrote: >>>>> Having two WANs, it would be reasonable, in case one doesn't work, to try >>>>> the other one. However, it's always useless to try the LAN. Is there >>>>> any way to configure which interface is used for outgoing queries? >>> You can configure "query-source" and "query-source-v6" in named.conf, to >>> tell BIND which interface to use for outgoing queries. >> >> >> Thank you, Anand; I hadn't found those statements. However, they take a >> single address only. >> >> I'm not as much concerned about IP version as about availability. Enabling >> IPv6 looks nice as I see queries going out through an interface which is not >> the default. But will named turn back to the default interface in case the >> IPv6 link goes down? >> >> Keep in mind that links sometimes seem to be up, as they're connected to a >> PPP peer or router, for example, but don't actually work. Knowing that UDP >> entails multiple attempts, it would be great to have, say, even attempts on >> wan0 and odd ones on wan1. If that's not possible, perhaps I could look for >> ways to configure it using dscp. Any hint? >> >> >> Best >> Ale >> -- >> >> >> >> >> -- >> Visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from >> this list >> >> ISC funds the development of this software with paid support subscriptions. >> Contact us at https://www.isc.org/contact/ for more information. >> >> >> bind-users mailing list >> bind-users@lists.isc.org >> https://lists.isc.org/mailman/listinfo/bind-users > -- > Visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from > this list > > ISC funds the development of this software with paid support subscriptions. > Contact us at https://www.isc.org/contact/ for more information. > > > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users -- Visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list ISC funds the development of this software with paid support subscriptions. Contact us at https://www.isc.org/contact/ for more information. bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
