NULL license plate not such a bright idea
A colleague used an app's "generate secure password" feature to change their ISP's web portal login - which then also became the WAN router's password - which they didn't realise.It was about a week before the router dropped its connection and needed to re-authenticate - and that's when I was called in to investigate the loss of connectivity - which Windows 10 very unhelpfully reported as the network cable disconnected and was resetting or power-saving on the NIC so the "link active" LED on the switch was going out for about 2 secs every 10 sec. Cue a round of cable and switch swapping to no benefit. The LEDs for all other devices on the switch (running Linux and mostly internal servers) were behaving normally.I finally backtraced to the router and a useful error message. We put two-and-two together and my colleague called up the auto-saved details in their password manager; it was long, and ALL non-alpha numeric characters - starting with a backtick, which the router would not accept. I tethered my phone to my laptop and tried to login to the Web account portal - which would NOT accept the passphrase. I tried it without the backtick "just in case" - nope.We had to do a "lost password" reset on the portal..and wait for the email with link.Lessons learned:The ISP's password change page did not seem to validate input, but the login page did.Avoid backticks in passwords.