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I got working domain with DHCP, DNS servers installed and firewall ZyWall 5 which resolves names to internet. In DHCP server configuration I've set also static IP address of server as a primary DNS server but when I try to renew IP address on Windows XP clients logged to domain there is only ZyWall IP address listed in DNS servers. This makes internet connection working but I can't login into domain on any computer vith Vista. Even with profiles which are already working well with Windows XP. And also when I try to check out comunication with nslookup, it also tries to ping ZyWall and also fails to do so as there is only Request timed out.

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Your ZyWall thing probably has it's own embedded DHCP server which is interfering with your Domain DNS. Disable that and you're done.

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DHCP server was already disabled on firewall but I've realized, that I did stupid mistake. I set DNS servers in DHCP settings for whole server but not for IP address pool. This was my first server configuration ever so I'm learning all the time. Thx! – Murdock Aug 18 '09 at 12:44

And also when I try to check out comunication with nslookup, it also tries to ping ZyWall and also fails to do so as there is only Request timed out.

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1  
Please update your original question. Do not post additional information as answer. This is not a forum. – Jan Jungnickel Aug 18 '09 at 11:10
    
Cmon guys -- dont knock down his update because he didn't understand the protcol. +1 to even it out a little. – SirStan Aug 18 '09 at 12:31
    
I didn't downvote his own answer. Since it's at -1 right now, I'll upvote it to 0. – Jan Jungnickel Aug 18 '09 at 12:34
    
Thanks! I'm sorry for this mess. – Murdock Aug 18 '09 at 12:46

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