Proxy Server using Squid Proxy Cache on Ubuntu Server 20.04 LTS

Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. 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.

Squid can implement caching and proxying of Secure Sockets Layer (SSL) requests and caching of DNS lookups, and perform transparent caching. Squid also supports a wide variety of caching protocols, such as ICP, HTCP, CARP, and WCCP.

Squid Proxy Features
Set ACL for which networks have access to internet
Block/Allow access to certain websites
Block/Allow Content Based on MIME Types (e.g image, text, mpeg)
Set time in which users can access the internet at certain times in the day
Cache frequently accessed websites, cache files/media
Hide users internal IP Addresses
Load balance with other Squid proxies
Clustering
Traffic Interception with WCCP
Set authentication to get users to Authenticate (LDAP, Active Directory,RADIUS, POP3, DB, etc)
Allow/Block IM (Instant Messaging)
Block coin-mining
Adaptation protocol (C-ICAP / eCAP)
Caching Dynamic Content
Fully Transparent Interception with Squid-2, TPROXYv2 and WCCP
Configuring multiple interception ports using WCCPv2
WCCP2 and NAT on a private internal network
PHP Redirectors
SMP Carp Cluster
Torrent filtering
Webwasher integration - prevent downloading of virus-infected files or to filter out adult content