Network problem with windows 2012 DNS

I have hardware VPN with two draytek routers. 192.168.1.1 ip on one side and 10.1.1.1 on the remote side.

My dns server (windows 2012) is set on the 192.168.1.Χ network.

If i try nslookup domain.name on the remote location (10.1.1.1) i get good results: 192.168.1.3 (dns)  and i also get the domain name.

If i try nslookup domain.name in the 192.168.1. X network is get "non existent domain"!

I'm able to ping the dns server and i'm also able to ping to FQDN.

Any possible solutions? Any recommendation on what to look?
LVL 1
kostbadAsked:
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Paul MacDonaldDirector, Information SystemsCommented:
What is returned when you PING "domain.name" from the 192.168.1.x network?
kostbadAuthor Commented:
server: speedport.ote.gr  (ote.gr is the internet provider, not my domain name or my ip!)
address: fe80::1

** speedport.ote.gr cant' find domain.com (non existent domain)
kostbadAuthor Commented:
I found the solution.

My ISP was handing out version 6 ip's and somehow this got into my network.

At first i disabled ipv6 from my router. Afterwards i also disabled ipv6 from both server and clients.
Strangely only the last (from the clients) totally solved my problem... or maybe a few resets were needed for the settings, i can't really be sure of that.

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Paul MacDonaldDirector, Information SystemsCommented:
Glad you were able to resolve the issue.
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Windows Server 2012

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