Really Simple SSL Pro (v9.5.10.1)

Firewall & Security Scanner, the most commonly used plugin.
In order to secure WordPress, Wordfence requires an endpoint firewall and a malware scanner designed from the ground up. To keep your website secure, our Threat Protection Feed weapons Wordfence with the newest firewall laws, malware signatures and malicious IP addresses it requires. The most robust WordPress protection solution available, rounded out by 2FA and a suite of additional features, is Wordfence.

The MainWP iThemes Security Extension combines the functionality of your MainWP Dashboard with the well-known iThemes Security Plugin (over 600,000 Active Installs). The iThemes Security Extension allows you to manage the iThemes Security settings for all of your child sites from the MainWP Dashboard.

Loginizer is a WordPress plugin that assists you in combating bruteforce attacks by blocking login for the IP after it reaches the maximum number of retries allowed. Loginizer allows you to blacklist or whitelist IP addresses for login. Other features such as Two Factor Authentication, reCAPTCHA, PasswordLess Login, and so on can be used to improve the security of your website.

Complianz is a GDPR/CCPA Cookie Consent plugin that complies with GDPR, DSGVO, CCPA, and PIPEDA by providing a conditional Cookie Notice and customized Cookie Policy based on the results of the built-in Cookie Scan.

SecuPress is a robust WordPress security plugin that protects your site from a variety of attacks. It includes a smart firewall, malware scanning, and protection from brute force assaults.

MainWP SSL Monitor Extension secures your websites by automatically verifying the state of your SSL certificates. It warns you before they expire, allowing you to renew them on time and provide continued protection.