Hi Sami. Have you tried `ecs-forward` in your BIND configuration? it will be described in the -S ARM.
Cheers, Greg On Tue, 3 Mar 2026 at 12:54, <[email protected]> wrote: > > > Hello, > > I am reaching out regarding the use of EDNS Client Subnet (ECS) in BIND. > > Context: > I am testing an environment where: > > - A dnsdist server receives client queries and injects a specific ECS > (e.g., 41.226.22.0/24). > - These queries are then forwarded to a BIND 9.18-S1 server configured > as the final resolver. > > Issue: > BIND does not forward the ECS to upstream servers and does not preserve > this information in responses. > > Questions: > > - Can BIND 9.18-S1 be configured to rewrite or forward an ECS injected > by dnsdist? > - If not, which version or configuration would you recommend for BIND > to meet this requirement? > > > > Best regards Sami, > > > -- > Visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe > from this list. >
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