Hi @ns_nirosh
I’m not familiar with the specifics of Italian ISPs and such, but:
Do you have both IPv6 and IPv4 enabled on your Internet connection?
Test it eg with whatismyip.com that will indicate IPv4 and / or IPv6.
You may need to get IPv4 “enabled” from your Provider…
(Phone or E-Mail query…)
You need IPv4 as NethServer can’t handle iPv6 correctly (yet), that will only come in NS8…
My 2 cents
Andy