SELinux,Fail2ban,Security Configurations

Install firewalld

 sudo yum install firewalld
 sudo systemctl start firewalld
 sudo systemctl enable firewalld
 sudo systemctl status firewalld

 sudo firewall-cmd --permanent --add-service=http
 sudo firewall-cmd --permanent --add-service=https
 sudo firewall-cmd --permanent --list-all
 sudo firewall-cmd --reload

 nano /etc/firewalld/firewalld.conf
 # AllowZoneDrifting=no

 Follow this link for Additional Firewall-Cmd Commands

SELinux Permissions

 setsebool -P httpd_can_network_connect 1
 setsebool -P httpd_execmem 1
 setsebool -P httpd_setrlimit 1
 setsebool -P httpd_can_sendmail 1
 setsebool -P allow_httpd_mod_auth_pam 1
 setsebool -P httpd_mod_auth_pam 1
 setsebool -P httpd_read_user_content 1
 setsebool -P httpd_run_stickshift 1
 setsebool -P httpd_enable_cgi 1
 setsebool -P httpd_unified 1
 setsebool -P httpd_enable_homedirs 1

FAIL2BAN

 sudo yum -y install epel-release
 sudo yum -y install fail2ban
 sudo systemctl enable fail2ban

 [DEFAULT]
 # Ban hosts for one hour:
 bantime = 360000
 findtime = 3600
 maxretry = 2

 # Override /etc/fail2ban/jail.d/00-firewalld.conf:
 banaction = iptables-multiport
 ignoreip = 127.0.0.1/8 154.160.2.127/8

 [sshd]
 enabled = true

 systemctl start fail2ban
 sudo systemctl status fail2ban
 sudo systemctl restart fail2ban

 sudo fail2ban-client status
 sudo fail2ban-client status sshd
 sudo fail2ban-client status wordpress
 sudo fail2ban-client status wordpress2
 sudo fail2ban-client status wordpress3
 sudo fail2ban-client status http-get-post-dos

Install Letsencrypt

 dnf install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm
 # (for centos 8) dnf config-manager --set-enabled PowerTools
 sudo dnf install certbot python3-certbot-nginx
 OR dnf install certbot python3-certbot-apache

 certbot --version
 certbot --nginx
 OR certbot --apache

 certbot renew
 certbot certificates
 certbot certonly --apache
 certbot certonly --nginx

 echo "0 0,12 * * * root python3 -c 'import random; import time; time.sleep(random.random() * 3600)' && certbot renew -q" | sudo tee -a /etc/crontab > /dev/null