squid-proxy

It reduces bandwidth and improves response times by caching
and reusing frequently-requested web pages.
Squid has extensive access controls and makes a great server accelerator.

usage: $ sudo snap set squid http-port=9876
supported parameters:
- http-port: The socket addresses where Squid will listen for HTTP client requests. The default is '3128'
- cache-mem: The ideal amount of memory (MB) to be used for in-transit/Hot/negative-Cached objects. The default is '256'
- maximum-object-size: The max-size parameter on any cachedir (MB). The default is '512'.
- maximum-object-size-in-memory: Objects greater than this size (MB)will not be attempted to kept in the memory cache. The default is '16'.
- cachedirspace: The amount of disk space (MB) to use under cache directory. The default value is '4096'.
- visible-hostname: If you want to present a special hostname in error messages, etc, define this. The default value is 'store.etag.proxy'.
- cachemgr: Email-address of local cache manager who will receive mail if the cache dies. The default value is 'webmaster@mail.com'.