Yes, look for “port” configuration in the documentation: https://bind9.readthedocs.io/en/v9_16_25/
You can configure the upstream to listen on non-standard port and the downstream to use it. We use this internally in the system tests. As a side note please separate the technical questions and rants. The experience shows that sticking to the technical questions leads to more pleasant experience on the mailing list. Thanks. Ondrej -- 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 11. 2. 2022, at 16:21, Tim Daneliuk via bind-users > <bind-users@lists.isc.org> wrote: > > > After some months of poking around, we are now certain that our so-called > "Business" > service from Comcast is compromising our DNS servers because of their > execrable "Security Edge" garbage. (They are willing to remove this 'service' > only if we are willing to incur a higher monthly recurring fee.) > > Our master is in the wild and works fine, but the slave is behind the > compromised > Comcast pipe. The effect of having Security Edge in place is that the > slave cannot get updates from the master and is also unable to resolve > anything outside our own zone. Comcast is apparently hijacking all port > 53 requests and doing unspeakable things with them. > > Is there a way to have these servers work as usual, listening to resolution > request on port 53, but have the slave update AND forward requests to the > master over a non-standard port, so as to work around the Comcast madness? > > TIA, > Tim > > P.S. My guess is that this so-call "security" service is no such thing, or at > least its not the only thing. They are probably harvesting DNS lookups > to sell as marketing data, or at least that would be my first guess. > -- > 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
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