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title: Implement Rate Limiting in ASP.NET Core | daily.dev
description: A walkthrough of ASP.NET Core's built-in rate limiting middleware (available since .NET 7) covering the four supported algorithms: fixed window, sliding...
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# Implement Rate Limiting in ASP.NET Core

**[NikolaTech](https://daily.dev/sources/nikolatech)** · 7 min read · 0 upvotes · 0 comments

## Summary

A walkthrough of ASP.NET Core's built-in rate limiting middleware (available since .NET 7) covering the four supported algorithms: fixed window, sliding window, token bucket, and concurrency limiters. Shows how to register the middleware with AddRateLimiter and UseRateLimiter, configure each limiter's options, and apply policies globally, to minimal API endpoints or groups, and to controller actions via EnableRateLimiting/DisableRateLimiting attributes. Notes that rate limiting mitigates DoS risk but is not sufficient against DDoS attacks, recommending a commercial DDoS protection service for that case.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://nikolatech.net/blogs/rate-limiting-asp-dotnet-core>

## Questions this post answers

### What rate limiting algorithms does ASP.NET Core's built-in middleware support?

ASP.NET Core's Microsoft.AspNetCore.RateLimiting middleware, available starting with .NET 7, supports four algorithms: fixed window, sliding window, token bucket, and concurrency limiting. Policies can be applied globally, to specific endpoints, by user identity, or by IP address, and multiple policies can be combined together.

_Developers choosing a rate limiting strategy for their API can compare these approaches through daily.dev._

### How do I apply different rate limiting policies to minimal API endpoints versus controller actions in ASP.NET Core?

For minimal APIs, use EnableRateLimiting and DisableRateLimiting extension methods on individual endpoints or on route groups created with MapGroup. For controller-based APIs, apply EnableRateLimiting and DisableRateLimiting as attributes at the controller or action level, allowing different policies per action within the same controller.

_Teams structuring API protection across minimal APIs and controllers can track patterns like this on daily.dev._

### Is rate limiting enough to protect an ASP.NET Core API from DDoS attacks?

No, rate limiting alone is not sufficient for DDoS protection. While it helps mitigate single-source denial-of-service attempts like brute-force attacks or resource exhaustion, DDoS attacks involve multiple systems overwhelming an application simultaneously, which rate limiting cannot handle alone; a commercial DDoS protection service is recommended for robust defense.

_Developers weighing security layers for their APIs can follow this kind of guidance on daily.dev._

## Similar posts on daily.dev

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- [Rate Limiting Algorithms: Token Bucket vs Sliding Window vs Fixed Window](https://daily.dev/posts/rate-limiting-algorithms-token-bucket-vs-sliding-window-vs-fixed-window-c6i3q4jdl) · Arcjet · 0 upvotes · 0 comments
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- [How to Build an In-Memory Rate Limiter in Next.js](https://daily.dev/posts/how-to-build-an-in-memory-rate-limiter-in-next-js-zzg3xyrqx) · freeCodeCamp · 12 upvotes · 0 comments

---

Tags: [#security](https://daily.dev/tags/security), [#.net](https://daily.dev/tags/.net), [#c#](https://daily.dev/tags/c#), [#aspnet](https://daily.dev/tags/aspnet)

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