We have 2 sites (Site A and B, site A is with 192.168.4/24 and B with 192.168.5./24 both with vpn router and real Internet IP) with a card access system. Site A is the one who has the card access server store all users information. We have a site B which we want to install card access device. The card access server uses port 1740 to call the card access device and card access device use 1750 port to call card access server. Both side we have real Internet IP. The saddest thing is the card access server software has no vpn routing function inside.
I read some vpn routing on Internet. Usually it is set on one side vpn router with true IP. Then the remote program can point to that true IP and it works. But our server software doesn't have such function, it can only do a boardcast on port 1740 to find the devices and we must work out everything on network level.
Thanks for any advices.
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