In the above video (Sorry, it's one of those annoying ones with no commentary or sound) we see how someone could use the THC-Hydra utility built into Kali Linux to brute force RDP, FTP, Telnet and HTTP. The truth is, you can actually brute force all sorts of protocols with it, including SMTP.
Apr 13, 2018
How to brute force RDP, FTP, Telnet and HTTP With Hydra
6:00 AM
Paul B