When I try to add our DMZ domain into the AD Domain Controllers list it comes back saying failed to find domain controller?

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  • Updated 6 years ago
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What port does it use to query the AD? Is it 389 LDAP?

This is the error I am getting
Domain Controllers in domain XXX.NET are identified, but could not be resolved to IP address.

List of unresolved machines in XXX.NET


Please verify DNS and WINs servers. 
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Posted 6 years ago

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Photo of Aisling Brennan

Aisling Brennan, Official Rep

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TCP ports ldap (389) and microsoft-ds (445), UDP port netbios (137)

The specific error you have got seems to be caused not by the
failure of LANGuardian to communicate with the DC, but by LANGuardian's
failure to convert the supplied names to IP addresses.

A solution to this is to add the DC as a
Wins server in the LANGuardian configuration page. This will enable
LANGuardian to interrogate the server again for the IP addresses.