Marc Shapiro via Dng said on Tue, 13 May 2025 22:44:39 -0700

>Yesterday, my internet connection failed. My ISP sent a tech out
>today. He replaced hardware outside, and eventually was able to
>connect his laptop directly to the ethernet where it comes into the
>house. It did not work when connected to my eero router.

"Did not work" covers a multitude of sins. From your computer,
plugged into your firewall, what's the result of:

ping 8.8.8.8

What's the result of browsing to a known-good IP address (not URL, IP
address)?

>The tech
>thinks the current problem is with the router. I have my doubts,
>however, since the desktop computer does not get a network connection
>when plugged into the router or directly into the ethernet port.

Don't ever do this again unless your firewall is in the router itself.
Plugging into the Internet without a firewall is like going to the
whorehouse without a condom. Use a computer with a throwaway OS for
this, and reformat and reinstall after your troubleshooting is
complete. If you choose to use your daily driver desktop, give it a
very strict firewall, like:

pass icmp
drop all outgoing on all ports
drop all incoming except on port 80

The rest of your message makes it look like a DHCP problem, but doing
the tests I suggest will prove or disprove that suspicion.

SteveT

Steve Litt

http://444domains.com