Install Squid Proxy Ubuntu Server

• Install Squid

sudo apt-get install squid

• Set squid to run after startup

update-rc.d squid3 defaults

• Open squid configuration file

sudo nano /etc/squid/squid.config

• Add this to the first line of squid.conf to use ipv4 only

dns_v4_first on

• Press Ctrl+w to search "http_access deny all"

• clear "#"

• Search "acl localnet" with Ctrl+w

• add line "acl localnet src your-ip-public"

• Press Ctrl+w to search "http_access allow"

• add line "http_access allow localnet"

• Press Ctrl+o and then press enter to save edited file

• restart squid service

sudo service squid3 restart

NB:

• You can change localnet to whatever you want
• To change proxy port, search "http_port 3128" and change 3128 with port you want

Source