Hello
Yes, cPhulk protects more than just access attempts to Web Host Manager. Other services protected include cPanel, SSH, FTP, IMAP, and POP3. Note that cPHulk will not protect POP3 or IMAP against IP-based brute force attacks if you use the Courier mailserver. Courier does not log the IP addresses of failed POP3 and IMAP logins.
You can find documentation for cPHulk at:
cPHulk for Brute Force Protection
Thank you.