Install package
$ sudo apt-get install squid
Configure squid
$ sudo vim.tiny /etc/squid/squid.conf
#acl rule defile after
acl mylan src 192.168.35.0/24
http_access allow localhost
http_access allow mylan
http_access deny all
#port define
http_port 3128
#define cache dir
cache_dir ufs /var/spool/squid 30000 16 256
Start service
$ sudo systemctl start squid
$ sudo systemctl status squid
$ sudo systemctl enable squid
$ sudo systemctl is-enabled squid
Logs file
$ sudo tail -f /var/log/squid/access.log
Block facebook.com
acl deny_site dstdomain "/etc/squid/deny_site"
http_access deny deny_site
#cat /etc/squid/deny_site
.facebook.com
Whenever do changes in configuration file reload squid service
$ sudo systemctl reload squid