Plz note the each location details :
1. Central Location (Main Control place) : 1 Server PC (Win Server 2003) controls 150 Net PCs having Win XP each at different floors using WORKGROUP domain system. The Server & all Net PCs are configured with DNS Server IP as given by Wireles Broadband ISP provider (202.148.200.6, e.g.) to get Internet, additionally Net PCs using Gateway as Server PC’s IP(say, 192.168.0.5). Email server is controlled using another hired servies as IP (say,74.58.12.36 )
2. Two remote locations have server configured PC (can provide VPN services)
3. other 4 remote location PCs are configured as Normal Server to facilitae Internet using Workgroup.
Now, How Central Location’s Server PC would control all Its’ remote locations Control PCs after changing Domain type from WORKGROUP to DOMAIN & DHCP concept to control all it’s net PCs(150) using the same Broadband Internet first with proper configuration ? Is ADC server / NAT (to share Internet among Net PCs) / any backup data server / VPN connection (Server to Server or any other) applicable ? Plz help me to understand as a complete diagram way to setup all Network as a Network Administrator.
This is a major rollout and yes it needs to be project managed to assure that the job is done correctly. The basic’s that you need to consider are:
Infrastructure:
You need to establish Router to Router VPN connections.
The routers control the DHCP subnet.
You need to Switch your subnet to 172.16.0.0 Let the routers control NAT
Routers set up for firewall rules such as DNS/LDAP/Windows Broadcasting etc etc
Router control Internet access via Group policy Recommened Sonicwalls as routing solution
Domain deployment.
Active Directory Master DC at central site and secondary controllers at each remote for local authentication, they can be file and backup as well.
Notes:- you may want to Consider Terminal Server as an Alternative or Citrix Metaframe.
I can be mailed, GTB is wrong their are the occasional higher level consultants available for comments. http://globalitservices.co.uk
Your application is way too sophisticated for this forum to address.
Since you clearly have no clue how to do this and because it is several days of work to define, clarify, troubleshoot, and implement, you need to hire someone trained in this specialty.
Network engineering at this level is not free.