VPN

Easiest way - buy VPN Broadband routers (for example, LinkSys). At first, it will protect your local network, and you will share your DSL connection. And you can configure VPN tunnel between your offices and it will work for all computers in your network. These routers costs ~150 - 200 USD.

Another way - build VPN tunnel between servers, if they are directly connected to DSL modem, but it may be more costly way since you will need VPN software, you should make your servers to be router for your network, etc.

Good luck.

We can't get DSL connections in most of our locations but have switched away from a leased line WAN to an ISDN VPN using ISDN modems / unmetered surftime accounts & VPN servers. Our remote locations have noticed no difference in performance and we now have a much more flexible network structure. Oh, and we are saving ?30k+ on comm's costs per year. The VPN servers are simply 'hardened' Linux servers that offer secure connections, email, proxy server, web hosting (if required, not for us), fax server, SMS messaging, virus scaning, firewalling, mobile user support. These are all built from standard open source applications (apart from the antivirus software) that have been put together in a pre-configured package with a Webmin based GUI by one of our suppliers. We looked long & hard at available options and couldn't find a better all-round offering (price, performance, functionality)

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