We are considering changing our public domain name, and investigating the possibility of having the same or different names for the public/external domain and internal Active Directory domain. The authoritative DNS servers for the public domain and Web Servers will be hosted on our site (managed internally).
What are the advantages/disadvantages of each way? Are there any security issues, when having the same name for external and internal domain? It seems that the management is much easier in that case. I guess in order for internal users to also be able to access the servers of the public domain, a DNS zone for the public domain must also be configured on the the internal DNS servers.
Please let me know your opinion.