Am 26.02.2012 19:03, schrieb Payal:
Hi all, I am helping a friend with this setup. They have a device which has a fixed ip (say 1.2.3.4) which talks with its software running on MS-Windows which must be physically connected to it and must have a specific IP (say 1.2.3.5) only. Now it happens that the laptop running that software is in a branch office so physical connection is not possible. So, we have thought of, Device(1.2.3.4)<-->(1.2.3.5)Linux(ext add.)<-->INTERNET<-->(ext. add.)Linux2(1.2.3.4)<-->(1.2.3.5)MS-Win Laptop
Have you thought about using a site-to-site ethernet bridge over an OpenVPN tunnel?
It also helps to protect your privacy with regard to the data passend netween laptop and device.
See http://www.openvpn.net/index.php/open-source/documentation/miscellaneous/76-ethernet-bridging.html for a starting point.
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