this post was submitted on 20 Jul 2023
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It's always DNS, should I complain? (lemmy.world)
submitted 1 year ago* (last edited 1 year ago) by aesir@lemmy.world to c/selfhosted@lemmy.world
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Hi,

What to do if the domain name of one of my webserver, that me and some lab members use for work related stuff, is no longer resolved by our university DNS? When I first noticed it, I could see no resolution at all while now the domain resolves to a wrong IP. The site can be normally reached on any other network so there is no problem on my side I think.

Should I just wait (now more than 24 hours) or should I try anything? I am entitled to complain to our IT even though the issue is only with this not-really-professional FreeDNS subdomain?

EDIT: apparently some automatism marked this domain as malicious (absolutely it is not, not willingly and not compromised) and somehow DNS resolves to CNAME sinkhole.paloaltonetworks.com.

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[–] aesir@lemmy.world 7 points 1 year ago (10 children)

I see your point, but now I do not think it is FreeDNS fault. DNSChecker.org shows my domain name properly resolved worldwide, and so it has been for months. I also created a second subdomain just now, exactly as the non-working one, and was properly resolved within seconds at my work pc. So I do not blame FreeDNS, I think it is our internal DNS server that is messed up or even hijacked.

[–] lungdart@lemmy.ca 1 points 1 year ago (9 children)

Try changing your DNS server in that case!

[–] aesir@lemmy.world 1 points 1 year ago (8 children)

I tried to set it to 8.8.8.8 but I have still the same result. Can it be overridden at the router level? So far the only solution is to manually add the damn line to etc/hosts.

[–] lungdart@lemmy.ca 1 points 1 year ago

Your host sets it's own DNS servers, if the router isn't on the list, they don't get pinged. Now they could try to man in the middle you, so you could try DNS over TLS, but it's probably not your issue.

You're DNS server settings likely never took hold. Like if you use a DHCP client, then override your DNS settings, that won't take effect until you request a new DHCP connection.

Some Linux distros will have local DNS servers that you always point to which are a pain to update as well. Not sure about Windows and MAC.

good luck man!

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