Why doesn't Squid 3 block social networks?

Question

Squid

Good day. Faced the problem that the transparent squid does not want to block http, like vk and other sites. I can't figure out why he's so stupid.
posting the conf

#Для ограничения доступа к сайтам
acl Siteban url_regex -i "/etc/squid3/blacklist"

acl SSL_ports port 443
acl Safe_ports port 80 # http
acl Safe_ports port 21 # ftp
acl Safe_ports port 443 # https
acl Safe_ports port 70 # gopher
acl Safe_ports port 210 # wais
acl Safe_ports port 1025-65535 # unregistered ports
acl Safe_ports port 280 # http-mgmt
acl Safe_ports port 488 # gss-http
acl Safe_ports port 591 # filemaker
acl Safe_ports port 777 # multiling http
acl CONNECT method CONNECT

#Отключение Ipv6
acl to_ipv6 dst ipv6
acl from_ipv6 src ipv6

#Ограничение скачивания файлов с расширением cmd, bat, vld
acl BlockedURLRegex url_regex -i "/etc/squid3/block_cmd"

#Списки пользователей для настройки ограничений
acl vip src "/etc/squid3/vip"
acl users src "/etc/squid3/users"
acl on_site url_regex -i "/etc/squid3/on_site"

http_access deny BlockedURLRegex
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
http_access deny manager
http_access allow vip
http_access deny Siteban users !on_site
http_access allow users
http_access allow localhost
http_access deny all

http_port 192.168.1.2:3129
http_port 192.168.1.2:3128 intercept

cache_mem 256 MB
maximum_object_size_in_memory 2048 KB
cache_dir ufs /var/spool/squid3 8168 16 256
maximum_object_size 100 MB

access_log daemon:/var/log/squid3/access.log squid
logfile_rotate 31
log_access deny localhost
debug_options ALL!cachemgr,1
coredump_dir /var/spool/squid3

refresh_pattern ^ftp:   1440    20%     10080
refresh_pattern ^gopher:        1440    0%      1440
refresh_pattern -i (/cgi-bin/|\?) 0     0%      0
refresh_pattern (Release|Packages(.gz)*)$ 0 20% 2880
refresh_pattern .       0       20%     4320

#Ограничение скорости
delay_pools 2
delay_class 1 1
delay_parameters 1 -1/-1
delay_access 1 allow vip
delay_access 1 deny all

delay_class 2 2
delay_parameters 2 -1/-1 80000/2500000
delay_access 2 allow users
delay_access 2 deny all

cache_effective_user proxy
cache_effective_group proxy
forwarded_for delete
connect_timeout 20 second
dns_v4_first on
tcp_outgoing_address 192.168.1.2 !to_ipv6
error_directory /usr/share/squid3/errors/ru
error_default_language ru

lines with siteban of this kind
vk\.com
users are specified in the range from-to.
forwarding to iptables of the form

iptables -t nat -A PREROUTING -i eth1 ! -d 192.168.1.0/24 -p tcp -m multiport --dport 80,8080,443 -j DNAT --to 192.168.1.2:3128

https will also be added over time, but so far even this does not work.
Thank you in advance.

Answer 1

tail -f /var/log/squid/cache.log and run vk.com in parallel for a user from the /etc/squid3/users
list Throw off the log.
What is the behavior when changing a string?

#http_access deny Siteban users !on_site
http_access deny Siteban

Answer 2

Maybe something like this?
\S*vk\.com\S*

Answer 3

Most likely due to the fact that social networks work through https