1. Set the stronger password for website admin page.
2. Install iptables
Firewall is the essential part of server configuration. To
install iptables is the best choice for server security.
3. Install SSL certificate
SSL certificate is a standard technology for establishing a secure connection between browsers and servers and protecting from the hacker attack.
4. Install the security plugins
Install
WPS hide login plugin to change your login URL, which makes the attackers difficult to find the login page. Install the security plugin like
Wordfence security which is WordPress firewall and security scanner.