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Discussion on: Why all developers should learn how to perform basic network troubleshooting

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jonasjohnson profile image
Jonas Johnson

This is so true, I just ran into this on a project I was working on and didn’t realize my isp was auto resolving sites for me when the weren’t giving me all the wrong results. Thanks for sharing this!

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memattchung profile image
memattchung

Interesting ! Can you elaborate on this — was your DNS pointing at your ISP's resolver?

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jonasjohnson profile image
Jonas Johnson

I searched for something and the dns responded, even though the site didn’t exist. I then called the non existent thing and it came back with a 200 response. You can probably tell I’m very new to this and so I can’t elaborate much. My mentor caught it because it just didn’t make any sense.

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memattchung profile image
memattchung

I think I have a better understanding. Likely the DNS record resolved returned an IP address pointed at a different address. Despite hitting that IP and receiving an HTTP 200 OK, the web site does not exist. Well, that's my guess at least.

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jonasjohnson profile image
Jonas Johnson

Yeah that sounds about right.