gate# cat /etc/squid/deny_hosts.txt

.*ok\.ru.*
.*vk\.com.*

gate# cat /etc/squid/permit_hosts.txt

.*microsoft\.com.*

gate# cat /etc/squid/squid.conf

...
# INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS
#
acl our_networks src 192.168.X.0/24
acl our_pppoe_networks src 192.168.100+X.0/24
acl big_boss src 192.168.113.100 192.168.100+X.101

acl deny_hosts url_regex "/etc/squid/deny_hosts.txt"
acl permit_hosts url_regex "/etc/squid/permit_hosts.txt"

http_access allow big_boss
http_access allow our_pppoe_networks !deny_hosts
http_access allow our_networks permit_hosts
...

gate# squid -k check

gate# squid -k reconfigure

[gate:~] # cd /usr/local/etc/squid/

root@gate:~# cd /etc/squid/

gate# cat squid.conf

...
# INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS
...
# Access for all success authentificated users
#acl inetuser proxy_auth REQUIRED

# Ассеss for users from list
#acl inetuser proxy_auth user1@CORPX.UN user2@CORPX.UN ...

# Ассеss for users from file
#acl inetuser proxy_auth_regex "/etc/squid3/group1.acl"
#acl inetuser proxy_auth_regex "/usr/local/etc/squid/group1.acl"

http_access allow inetuser
http_access deny all
...

gate# getent group group1 | cut -f4 -d: | tr "," "\n" > group1.acl

gate# squid -k reconfigure

gate# ntlm_auth --username=user1 --require-membership-of=CORPX\\group1