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You'll need to open those ports both ways. &nbsp;The traffic is UDP, so you have to allow traffic back from the server to the DMZ too.
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You'll need to open those ports both ways.  The traffic is UDP, so you have to allow traffic back from the server to the DMZ too.

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Hi,<br />
<br />
I have a problem joining a server in my DMZ zone to the domain . my configuration is as follows:<br />
<br />
LAN : has windows 2008R2 DC with DNS service up and running<br />
DMZ : has windows 2008R2 server configured to point to Windows 2008 R2 DC as it's DNS server<br />
the firewall between them is Cisco ASA , I opened all ports from DMZ to Internal (for testing) <br />
I can ping the DNS , but I can not resolve any DNS names .<br />
I attached a schematic diagram illustrate my scenario <br />
any suggestion ??<br />
<a href="https://filedb.experts-exchange.com/incoming/2013/12_w51/693042/DNS-Issue.pdf" target="_blank" class="file-inline" title="Network Diagram (27 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>DNS-Issue.pdf</a>
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DNS-Issue.pdf

Hi,

I have a problem joining a server in my DMZ zone to the domain . my configuration is as follows:

LAN : has windows 2008R2 DC with DNS service up and running
DMZ : has windows 2008R2 server configured to point to Windows 2008 R2 DC as it's DNS server
the firewall between them is Cisco ASA , I opened all ports from DMZ to Internal (for testing) 
I can ping the DNS , but I can not resolve any DNS names .
I attached a schematic diagram illustrate my scenario 
any suggestion ??

Clients can not resolve DNS names Behind Firewall

The Microsoft Server topic includes all of the legacy versions of the operating system, including the Windows NT 3.1, NT 3.5, NT 4.0 and Windows 2000 and Windows Home Server versions.

Microsoft Server OS

The Microsoft Legacy Operating System topic includes legacy versions of Microsoft operating systems prior to Windows 2000: All versions of MS-DOS and other versions developed for specific manufacturers and Windows 3/3.1, Windows 95 and Windows 98, plus any other Windows-related versions, and Windows Mobile.

Microsoft Legacy OS

The Windows operating systems have distinct methodologies for designing and implementing networks, and have specific systems to accomplish various networking processes, such as Exchange for email, Sharepoint for shared files and programs, and IIS for delivery of web pages. Microsoft also produces server technologies for networked database use, security and virtualization.