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zurn
6y ago
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It works over DNS. There is a lot written about it on the net, I don't have any specific recommended article.
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BrandoElFollito
6y ago
I now how to do the check over DNS when the name is known outside - the problem is that I have my own internal domain not visible on Internet
zurn
OP
6y ago
You need a registered domain for this. It's a good idea for other reasons too.
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