DNS records visible only for LAN computers

Peter Macko peter_macko at msn.com
Sun Nov 15 19:22:34 UTC 2009

Setup:I have a domain example.com that is hosted on DNS under control of my internet provider.Web server www.example.com is hosted by another company.I have setup a local DNS for computers on my LAN. I have a LDAP server on LAN.
Question:I want to make LDAP visible only for computers on LAN without altering DNS (of the internet provider).The name of LDAP server should be ldap.example.com. Is it possible to do it?
I can think of two solutions:1) I could create master zone for example.com on DNS (on LAN). This way I have to create A record for www.example.com,but if internet provider changed ip address of the web-server, computers on lan would not reachwww.example.com and I would have to update A record on local DNS.
2) Another solution is to create zonefile for subdomain local.example.com on LAN DNS, so ldap.local.example.com.But this is not exactly what I want.
What is the correct solution?
Thank you 		 	   		  
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