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 ...

So, i’m trying to program an embedded device to connect to a website and pull down some data. However, I can’t quite test the protocol (and it’s a PITA to recompile and reupload to the device each ...

The 11-year-old vulnerability likely impacts many devices that are no longer supported — and presents easy exploit even for those that are. Computers with Telnet open are in immediate danger of being ...