yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm

sudo yum install squid

sudo yum install squidGuard

openssl req -new -newkey rsa:2048 -sha256 -days 365 -nodes -x509 -extensions v3_ca \
-keyout squid-ca-key.pem -out squid-ca-cert.pem

openssl x509 -in squid-ca-cert.pem -outform DER -out squid-ca-cert.der

cat squid-ca-cert.pem squid-ca-key.pem >> squid-ca-cert-key.pem

sudo mkdir /etc/squid/certs
sudo mv squid-ca-cert-key.pem /etc/squid/certs/
sudo chown -R squid:squid /etc/squid/certs

sudo squid -k parse

sudo /usr/lib64/squid/ssl_crtd -c -s /var/lib/ssl_db
sudo chown -R squid:squid /var/lib/ssl_db

mkdir /var/squidGuard/blacklists

chown -R squid:squid /var/squidGuar/blacklists

sudo systemctl enable squid
sudo systemctl start squid
sudo systemctl enable squidGuard
sudo suystemctl start squidGuard