Dell XPS 15 9530, Windows 11 Pro 10.0.22631, x64, 13th Intel Core i9… I could go on. Hopefully that’s enough info.
This is a sub for asking tech questions right? Apologize if not.
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Jr Modem Engineer: Hey Steve, what should we do if their Internet is out and they want an https cert that we are unable to find?
Sr Modem Engineer: Well, Frank, glad you asked! We’ll just quietly substitute it with this random janky self-signed certificate for the modem itself instead, I’m sure that’ll solve everything!
Jr: But won’t that just obscure the real problem and overwhelm the user with a bunch of unnecessary and incorrect error messages?
Sr: Sometimes my genius is almost frightening.
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Nah, this is not really a tech support community, but whatever. (Unless it is a tech support community? I always thought pcmasterrace was supposed to be a hair on the sarcastic side.)
It looks like a self-signed cert that is on your DSL modem (The subdomain was ‘dsldevice’…) and I am guessing you are trying to use the web interface for your modem?
If you aren’t making a connection to that device (which would have an IP address in 192.168.x.x, 10.x.x.x or 172.16.x.x) and you are trying to browse to an external site, then:
- There is no internet connection and your device is injecting a local address for an external DNS query to give you a hint that you need to fix yo’ shit or
- Your device is super old and cannot handle HTTPS correctly. (Unlikely)
- Your DSL device is hijacked and is doing an MTM attack on a HTTPS connection. (Highly unlikely, but you never know.)
Do regular web sites work correctly, or does this happen regardless of the site you are attempting to browse to?
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Could be that you didn’t pay your internet bill, or your modem has no service.
dsidevice.domain_not_set.invalid is the name on the certificate. That’s not the name of a real website. This means that something else is making that certificate.
If you Google that name, you’ll see that it’s used when some Internet routers lose their connection and they hijack the https connection to give you an error page. Since it’s an https connection, and it’s not a valid certificate you get the error.
Are you connecting through a proxy? Are you familiar with the name given for the certificate: dsldevice?
It looks like malware that wants to harvest your credentials at every site you visit.
