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I have a website on the web. Published and it's OK on most computers.

However, some computers always get a 404 response. Why?

I am no expert in what relates to networks and stuff but I imagined the domain would need more time to be spread all over the web. However, this is happening since 3 or 4 days ago.

I did a check worldwide and apparently all servers world wide in check were alright.

I did a dnsflush to no avail too.

I don't have the specific domain on my hosts file.

Can anyone please give some guidelines about what I have to do to narrow the problem?

share|improve this question
First you should check if those errors actually appear in your server's log file. If they do, you know that at least the clients are hitting your server so a DNS problem is unlikely. If they don't, you know the clients are hitting the wrong server for one reason or another. – Celada Oct 1 '12 at 14:02
Thanks for guideline. Yes, I just checked event viewer and there are not errors for this site. So I guess something else is responding with a 404 somewhere else. It kind of makes sense because the resource is in the server. Do you have any suggestions on how I should approach the DNS issue? – Fabio Milheiro Oct 1 '12 at 14:10
Depends on if the DNS has updated or not with each ISP. Please note, they say it takes up to 72 hours but this is a ball park average. It can take days (depending on how often the ISP update their DNS records). Use this site to test your website – Dave Oct 1 '12 at 14:22
@FabioMilheiro Check all of the authoritative DNS servers for your domain to see if one of them might be out of sync and giving out incorrect A or AAAA records that point to an incorrect server. It could be that one of your slaves is not getting updates from the master. To query each name server directly, use dig @x.y.z.w a and dig @x.y.z.w aaaa where x.y.z.w is the IP address of the name server. – Celada Oct 1 '12 at 14:32

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