AD replicate after NAT

According to Microsoft, AD doesn't support Active Directory.

Recently, I have a customer need to setup the trust and the AD between the NAT. the route is not work.

Also DC will have issue if the DC have multi network card will introduce multihome issue.
Also it will have issue if it is a DNS server.

After I found a lot of related document in the Internet. I found a article  and use the regkey to limit DC to publish the DNS record

https://alasdaircs.wordpress.com/2012/07/17/a-little-active-directory-dns-server-magic/

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DNS\Parameters\PublishAddresses
Data type: REG_SZ
Range: IP address [IP address]
Default value: blank
It will fix the issue, however, it wont fix the the DNS issue between NAT.
after that I found a separate server to own the DNS role and create related the DNS record
_kerberos._tcp.dc._msdcs.domainname.local

Technet have more detail about it
https://technet.microsoft.com/en-us/library/cc961719.aspx

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