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Clean up /inline-errata/ from EDNS RFC links
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src/content/docs/dns/dns-firewall/faq.mdx

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@@ -32,7 +32,7 @@ Yes. `SERVFAIL` is treated like any other negative answer for caching purposes.
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<Details header="Does DNS Firewall support EDNS Client Subnet (ECS)?">
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Yes. Often, DNS providers want to see a client's IP via <GlossaryTooltip term="EDNS Client Subnet (ECS)">EDNS Client Subnet (ECS)</GlossaryTooltip> ([RFC 7871](https://www.rfc-editor.org/rfc/inline-errata/rfc7871.html)) because they serve geographically specific DNS answers based on the client's IP. With EDNS Client Subnet enabled, the DNS Firewall will forward the client's IP subnet along with the DNS query to the upstream nameserver.
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Yes. Often, DNS providers want to see a client's IP via <GlossaryTooltip term="EDNS Client Subnet (ECS)">EDNS Client Subnet (ECS)</GlossaryTooltip> ([RFC 7871](https://www.rfc-editor.org/rfc/rfc7871.html)) because they serve geographically specific DNS answers based on the client's IP. With EDNS Client Subnet enabled, the DNS Firewall will forward the client's IP subnet along with the DNS query to the upstream nameserver.
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When EDNS is enabled, the DNS Firewall gives out the geographically correct answer in cache based on the client IP subnet. To do this, the DNS Firewall segments its cache. For example:
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src/content/glossary/dns.yaml

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general_definition: |-
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ECS is a DNS extension that enables recursive DNS resolvers to include client IP address information in their DNS queries.
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Not all resolvers use ECS but, if they do, usually a part of the IP address is omitted. Sending ECS headers is generally intended to reduce latency and speed up content delivery in connection to [CDNs](/glossary/?term=cdn) and [load balancers](https://www.cloudflare.com/learning/performance/what-is-load-balancing/). The ECS mechanism is specified in [RFC 7871](https://www.rfc-editor.org/rfc/inline-errata/rfc7871.html).
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Not all resolvers use ECS but, if they do, usually a part of the IP address is omitted. Sending ECS headers is generally intended to reduce latency and speed up content delivery in connection to [CDNs](/glossary/?term=cdn) and [load balancers](https://www.cloudflare.com/learning/performance/what-is-load-balancing/). The ECS mechanism is specified in [RFC 7871](https://www.rfc-editor.org/rfc/rfc7871.html).
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associated_products:
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- Load Balancing
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- Cloudflare One

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