A yearly scan of exposed ports has revealed that there are nearly 10 million devices with open Telnet ports connected to the Internet as we speak, opening themselves to brute-force attacks from IoT ...

I once new a way of checking for an open relay by telneting into port 25 on the smtp server. I have since forgotten. Can anyone reffresh my memory as I dont want to leave my mail server open to ...

Mirai took advantage of insecure IoT devices in a simple but clever way. It scanned big blocks of the internet for open Telnet ports, then attempted to log in default passwords. In this way, it was ...

Desktop clients send email over Gmail using the simple mail transfer protocol. You can use the telnet program on your computer to connect to Gmail's SMTP server and verify the connection is working ...