Help needed regarding VPN

[Vikash Bhagchandka]

Dear Friends:

I needed your advice to decide on the type of network that should be used
for remote data processing in India. I have two basic requirements:

1.	I need remote access to my clients database.
2.	I need to remotely update my clients database on real time basis from a
remote site like India.

I have researched on the two possibilities. VPN over IP (Internet) or VPN
over Frame Relay (Point to Point). However, I am confused because all my
clients have different network structure, use different software's, are
located all over the US and use different formats of database at their
respective end. Moreover, the process that is to be done by me in India is
the same.

The current network details of my clients are as follows:

1.	The client is using Novell 3.12 running IPX. Citrix Winframe 1.7 is used
for their WAN connectivity between offices. They are running TCP/IP over the
WAN, but IPX on the LAN. The database used is a 16 bit DOS application. Data
can be imported in an HL-7 format.  Data can also be exported in this
format, or in ASCII.

2.	The second client is using Mumps for networking on a Windows 95 operating
system. The software being used for claims processing is DOS based. Most of
the clients are dumb terminals with a few of them having hard disks. All the
terminals are connected to the file server where all the information is
stored and processed using a central board and CAT 5 cables.

3.	The third clients system is based on a NETBIOS network (clone of DECNET)
of four DOS based PC database servers and four combination application
server/terminal server DOS based PCs. Total storage approximates 50 GB
across the four database servers. They are using Intersystems Cache for the
database which supports the web and TCP/IP protocols.


Any help in this regard would be appreciated.

Regards,
Vikash Bhagchandka

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