# vi /etc/squid/squid.conf
Adding the source code
acl deny_dst dstdom_regex \.telegram.org$
http_access deny deny_dst
or
acl deny_dst dstdomain .telegram.org
http_access deny deny_dst
CentOS 7.x
# systemctl restart squid
CentOS 6.x
# service squid restart
#텔레그램
