Squid

Squid is a high-performance caching proxy that optimizes network bandwidth and accelerates web delivery through efficient content reuse.

Squid handles the heavy lifting for network traffic by caching frequently accessed content to save bandwidth. It supports HTTP, HTTPS, and FTP, making it a versatile tool for ISPs and large-scale data centers. You can use its detailed Access Control Lists (ACLs) to lock down security or manage user permissions with precision. By offloading repetitive requests from your origin servers, Squid keeps response times low and throughput high even under heavy load.

https://www.squid-cache.org/