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[中文 ](plugins-cn.md )
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## Plugins
Now we support the following plugins:
* [HTTPS ](https.md ): dynamic load the SSL Certificate by Server Name Indication (SNI).
* [dynamic load balancing ](#Plugins ): load balance traffic across multiple upstream services, supports round-robin and consistent hash algorithms.
* [key-auth ](plugins/key-auth.md ): user authentication based on Key Authentication.
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* [JWT-auth ](plugins/jwt-auth-cn.md ): user authentication based on [JWT ](https://jwt.io/ ) (JSON Web Tokens) Authentication.
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* [limit-count ](plugins/limit-count.md ): rate limiting based on a "fixed window" implementation.
* [limit-req ](plugins/limit-req.md ): request rate limiting and adjustment based on the "leaky bucket" method.
* [limit-conn ](plugins/limit-conn.md ): limite request concurrency (or concurrent connections).
* [prometheus ](plugins/prometheus.md ): expose metrics related to APISIX and proxied upstream services in Prometheus exposition format, which can be scraped by a Prometheus Server.
