apt -y install squidguard

vi /etc/squidguard/squidGuard.conf

# create new ( simply settings as an example )

dbhome /var/lib/squidguard/db
logdir /var/log/squidguard
dest deny {
   
    domainlist deny/domains
   
    urllist deny/urls
}
acl {
    default {
       
        pass !deny all
       
        redirect http://www.srv.world/error.html
    }
}

vi /var/lib/squidguard/db/deny/domains

# write domains you'd like to prohibit to access

yahoo.co.jp
example.com

vi /var/lib/squidguard/db/deny/urls

# write URLs you'd like to prohibit to access

www.yahoo.co.jp/deny/
www.example.com/

chown -R proxy. /var/lib/squidguard /var/log/squidguard

vi /etc/squid/squid.conf

# line 4449: add

url_rewrite_program /usr/bin/squidGuard