--- title: Proxy status description: Proxy status options for load balanced traffic. image: https://developers.cloudflare.com/core-services-preview.png --- > Documentation Index > Fetch the complete documentation index at: https://developers.cloudflare.com/load-balancing/llms.txt > Use this file to discover all available pages before exploring further. [Skip to content](#%5Ftop) # Proxy status You can load balance your traffic at different levels of the networking stack, such as: * [Layer 7 (HTTP/HTTPS)](#layer-7-load-balancing) (most common) * [DNS-only](#dns-only-load-balancing) * [Layer 4 (TCP)](#layer-4-load-balancing) --- ## Layer 7 load balancing Layer 7 load balancers direct traffic to specific endpoints based on information present in each HTTP/HTTPS request (HTTP headers, URI, cookies, type of data, etc.). When a client visits your application, Cloudflare directs their request to a healthy endpoint (determined by your [traffic steering policy](https://developers.cloudflare.com/load-balancing/understand-basics/traffic-steering/steering-policies/) and [endpoint weights](https://developers.cloudflare.com/load-balancing/understand-basics/traffic-steering/origin-level-steering/#weights)). Cloudflare performs layer 7 load balancing when traffic to your hostname is **proxied** through Cloudflare. In the **Load Balancing** dashboard, these load balancers are marked with an orange cloud. ![DNS-only load balancers are marked with an orange cloud](https://developers.cloudflare.com/_astro/proxied-load-balancer.BMq3VCyA_1BeaMW.webp) Note that if a [DNS-only (grey cloud)](https://developers.cloudflare.com/dns/proxy-status/) CNAME record points to a proxied load balancer, the IP returned for it would be endpoint IP and a HTTP request sent to it would not be proxied. ### Benefits In comparison to DNS-only load balancing, layer 7 load balancing: * Protects endpoints from DDoS attacks by hiding their IP addresses. * Offers faster failover and more accurate routing, which can otherwise be affected by DNS caching. * Integrates with other Cloudflare features such as caching, Workers, and the WAF. * Reduces authoritative queries against Cloudflare, which can potentially save money for customers with usage-based billing. * Supports customized [session affinity](https://developers.cloudflare.com/load-balancing/understand-basics/session-affinity/) and [endpoint drain](https://developers.cloudflare.com/load-balancing/understand-basics/session-affinity/#endpoint-drain). * More accurately geo-locates traffic, using the data center associated with the user making the request instead of the data center associated with a user's recursive resolver. * Supports private IP addresses with [Private Network Load Balancing](https://developers.cloudflare.com/load-balancing/private-network/). --- ## DNS-only load balancing DNS-only load balancers route traffic by returning specific IP addresses in response to a client's DNS query. When a client visits your application, Cloudflare provides the address for a healthy endpoint (determined by your [traffic steering policy](https://developers.cloudflare.com/load-balancing/understand-basics/traffic-steering/steering-policies/) and [endpoint-level steering policy](https://developers.cloudflare.com/load-balancing/understand-basics/traffic-steering/origin-level-steering/)). However, Cloudflare relies on DNS resolvers respecting the short TTL to re-query Cloudflare's DNS for an updated list of healthy addresses. If a client has a cached DNS response, they will go to their previous destination, potentially ignoring your load balancer. Cloudflare performs DNS-only load balancing when traffic to your hostname is **not proxied** through Cloudflare. In the **Load Balancing** dashboard, these load balancers are marked with a gray cloud. ![DNS-only load balancers are marked with a gray cloud](https://developers.cloudflare.com/_astro/dns-only-load-balancer.DI9EgD6m_1nkQpb.webp) Note Note that if a load balancer endpoint is a [proxied (orange-cloud)](https://developers.cloudflare.com/dns/proxy-status/) CNAME record on Cloudflare, the IP returned for it would be Cloudflare's and a HTTP request sent to it would be proxied accordingly. ### Benefits If your load balancer is attached to a hostname used for an [MX or SRV record](https://developers.cloudflare.com/load-balancing/additional-options/additional-dns-records/) — and not an `A`, `AAAA`, or `CNAME` record — its proxy mode should be **DNS-only**. ### Limitations In comparison to proxied, layer 7 load balancing, DNS-only load balancing: * Does not hide the IP addresses of your endpoints, leaving them vulnerable to DDoS attacks. * Performs slower failover and less accurate routing, because it has to rely on DNS resolvers and cache settings. * Cannot integrate with other Cloudflare features such as caching, Workers, and the WAF. * Increases authoritative queries against Cloudflare, which can potentially cost more for customers with usage-based billing. * Does not support [session affinity](https://developers.cloudflare.com/load-balancing/understand-basics/session-affinity/). Alternatively, you can use [DNS persistence](https://developers.cloudflare.com/load-balancing/additional-options/dns-persistence/). * Geo-locates traffic based on the data center associated with the ECS source address, if available. If not available, geo-locates based on a user's recursive resolver, which can sometimes cause issues with [latency-based steering](https://developers.cloudflare.com/load-balancing/understand-basics/traffic-steering/steering-policies/dynamic-steering/). * Does not support [Private Network Load Balancing](https://developers.cloudflare.com/load-balancing/private-network/). --- ## Layer 4 load balancing Layer 4 load balancers route traffic by forwarding traffic to certain ports or IP addresses. Cloudflare currently only supports layer 4 load balancing as part of [Cloudflare Spectrum](https://developers.cloudflare.com/spectrum/about/load-balancer/). Note Since Spectrum operates at the TCP level, it does not have the information to support features like [session affinity](https://developers.cloudflare.com/load-balancing/understand-basics/session-affinity/), [custom rules](https://developers.cloudflare.com/load-balancing/additional-options/load-balancing-rules/), or caching. ```json {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"/directory/","name":"Directory"}},{"@type":"ListItem","position":2,"item":{"@id":"/load-balancing/","name":"Load Balancing"}},{"@type":"ListItem","position":3,"item":{"@id":"/load-balancing/understand-basics/","name":"Concepts"}},{"@type":"ListItem","position":4,"item":{"@id":"/load-balancing/understand-basics/proxy-modes/","name":"Proxy status"}}]} ```