DNS works intermittently or not at all for external addresses after upgrading to Windows 2003.
Windows 2003 has extended DNS on by default, in this mode it sends requests for additional records. Some devices such as Cisco Pix and some routers cannot handle the additional record requests and therefore DNS fails.
You can test if this condition is causing your problem by first performing an NSLOOKUP and then visiting the web site you received the error on.
Example:
1. Open Internet Explorer and attempt to visit and receive a DNS error. Close Internet Explorer.
2. Open a command prompt.
3. Type nslookup <enter>
4. Type <enter>
5. Open Internet Explorer and attempt to visit and connect to web page. Close Internet Explorer.
Disabling the Extended DNS function in the registry and restarting the DNS service will resolve this issue.
To resolve create a new REG_DWORD under
HKLM\CurrentControlSet\Services\DNS\Parameters
Name it EnableDnsProbes and leave its value Zero.
Restart the DNS Server service.
Restart workstations.
Windows 2003 has extended DNS on by default, in this mode it sends requests for additional records. Some devices such as Cisco Pix and some routers cannot handle the additional record requests and therefore DNS fails.
You can test if this condition is causing your problem by first performing an NSLOOKUP and then visiting the web site you received the error on.
Example:
1. Open Internet Explorer and attempt to visit and receive a DNS error. Close Internet Explorer.
2. Open a command prompt.
3. Type nslookup <enter>
4. Type <enter>
5. Open Internet Explorer and attempt to visit and connect to web page. Close Internet Explorer.
Disabling the Extended DNS function in the registry and restarting the DNS service will resolve this issue.
To resolve create a new REG_DWORD under
HKLM\CurrentControlSet\Services\DNS\Parameters
Name it EnableDnsProbes and leave its value Zero.
Restart the DNS Server service.
Restart workstations.
