Re: Hajime discovers devices on TCP port 23
No one in their right mind has telnet with default passwords running on a device connected to the Internet.
That's because you're thinking sysadmin, software, or just old fashioned sensible.
Stop all that, and think manufacturing. No such thing as pentesting, no such thing as UAT, just a simple test for readiness to ship: Was it cheap to build, and does the f***er basically work? Now think Shenzen no-brand IoT manufacturer, working in a market where consumer protection is merely an alien concept....and there you have the origins of IoT.