Appreciation post: the retired sysadmin who caught my rookie mistake at the library

Back in 2019 I was running a small side gig helping seniors set up their home Wi-Fi and firewalls. One afternoon at the public library in Dayton, Ohio, I was helping a guy named Frank, maybe 75, with a router that kept dropping connections. I told him it was probably his ISP and started tweaking the DNS settings. He just watched for a minute, then said, 'Son, you're fixing the lock while the window's wide open.' He pointed to the router's management page showing remote admin enabled on port 8080. I had never even checked that. He then showed me how to disable it and set up a simple MAC address filter, took about 5 minutes. I felt dumb but grateful, and honestly that one moment made me double check every single device I touch since. Has anyone else had an older tech person drop knowledge like that out of nowhere, and what did they teach you?

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torres.drew23d ago

That library in Dayton must have some decent air conditioning, because three different times last year I had customers bring in routers with remote admin left wide open, and not one of them had a senior citizen around to catch it. You got lucky with Frank, but honestly, the whole story reads like a feel-good movie that misses the real point. Disabling remote admin and setting a MAC filter is maybe five minutes of work, sure, but if the firewall on the router itself is junk, which most consumer ones are, then MAC filtering is just a paper lock on a screen door. I've seen MAC addresses spoofed in about ten seconds with free software, and remote admin can come back through a firmware update without anyone noticing. The real lesson isn't that the old guy was wise, it's that you skipped the absolute basics on a device you were getting paid to fix, and if that's your baseline, then every router you've touched since should scare you more than it comforts you.

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