Cannot access a specific webserver

Hi,

We're having a bit of a weird problem here. It turns out we cannot access two specific websites "inktmedia.nl" and "inktmedia.com". The inktmedia.nl just forwards the request to the inktmedia.com address, but both have different ip address:

inktmedia.nl = 188.93.150.20
inktmedia.com = 93.94.226.71

The weird thing is that our DNS server can resolve these addresses just fine, but for some reason we are not able to access them. We also tried to ping these addresses from the clients, as well as the router and it's seems it's somewhat intermittent (see the screenshot).

Any suggestions?
Capture.PNG
inidentAsked:
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Darius GhassemCommented:
Clear your DNS cache.

Add updated DNS Forwarders
inidentAuthor Commented:
We already tried that, without success. We even added some opendns forwarders but that didn't help either.
Darius GhassemCommented:
Really points to a network issue.

Run dcdiag post results
inidentAuthor Commented:
We renewed are public IP-address and it seems to work again. Thanks for your help, though.

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