apt install squid
  
  
  systemctl enable squid

vi /etc/squid/squid.conf
  acl localnet src 192.168.0.0/16
  http_access allow localnet
  http_access allow localhost
  http_port 3128


ACLs
 acl_working_hours time MTWHF 07:00-19:000
 acl blokedsite url_regex ^http://.*.oracle.com/.*$
 acl valid_users proxy_auth REQUIRED
 http_access allow workinghours

netstat -putona|grep squid
ss -putona|grep squid

vi  /etc/squid/squid.conf 
  acl blockedsite url_regex ^http://.*.oracle.com/.*$
  acl blockedsite url_regex ^https://.*.oracle.com/.*$
  http_access allow localnet !blockedsite
  http_access deny blockedsite

systemctl  stop squid
systemctl  start squid

tail -f /var/log/squid/*.log  /var/log/syslog

Configurar navegador para usar el proxy