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Active Directory, Second Edition by Alistair G. Lowe-Norris, Robbie Allen

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Resource Records Used by Active Directory

When you promote a domain controller into a domain, a file containing the necessary resource records for it to function correctly within Active Directory is generated in %SystemRoot%\System32\Config\netlogon.dns.

The contents of the file will look something like the following for a DC named moose.mycorp.com in the mycorp.com domain with IP address 10.1.1.1. We’ve reordered the file a bit to group records of similar purpose together. Note that some lines may wrap due to their length.

mycorp.com. 600 IN A 10.1.1.1 ec4caf62-31b2-4773-bcce-7b1e31c04d25._msdcs.mycorp.com. 600 IN CNAME moose.mycorp. com. gc._msdcs.mycorp.com. 600 IN A 10.1.1.1 _gc._tcp.mycorp.com. 600 IN SRV 0 100 3268 moose.mycorp.com. _gc._tcp.Default-First-Site-Name._sites.mycorp.com. 600 IN SRV 0 100 3268 moose. mycorp.com. _ldap._tcp.gc._msdcs.mycorp.com. 600 IN SRV 0 100 3268 moose.mycorp.com. _ldap._tcp.Default-First-Site-Name._sites.gc._msdcs.mycorp.com. 600 IN SRV 0 100 3268 moose.mycorp.com. _kerberos._tcp.dc._msdcs.mycorp.com. 600 IN SRV 0 100 88 moose.mycorp.com. _kerberos._tcp.Default-First-Site-Name._sites.dc._msdcs.mycorp.com. 600 IN SRV 0 100 88 moose.mycorp.com. _kerberos._tcp.mycorp.com. 600 IN SRV 0 100 88 moose.mycorp.com. _kerberos._tcp.Default-First-Site-Name._sites.mycorp.com. 600 IN SRV 0 100 88 moose. mycorp.com. _kerberos._udp.mycorp.com. 600 IN SRV 0 100 88 moose.mycorp.com. _kpasswd._tcp.mycorp.com. 600 IN SRV 0 100 464 moose.mycorp.com. _kpasswd._udp.mycorp.com. ...

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