We use Zebedee. This is an open source tunnelling solution that
provides an encrypted, compressed tunnel over an insecure WAN.
http://www.winton.org.uk/zebedee/

It is simple to configure and use, and the licensing is GPL2 (ie.
"free")

If you need more sophistication, you could also try using openSSH to
create a tunnel - also an open source project.

Hope this helps.

Regards
Richard Salt

--- In firebird-support@yahoogroups.com, Hannes Streicher
<hstreicher@...> wrote:

>
> Hello Zd,
>
> sounds like VPN is the way to go, it is built in into all modern
> Operating systems
> and even cheap household ADSL-routers have VPN capabilities built in
>
>
>
> > This is a no go as my clients won't be spending thousands of
> > dollars on buying a server + the licenses...
>
> > The app I'm selling is very cheap, and I need a very cost-

effective solution...

>
> Happy New Year!
>
> --
> Mit freundlichen Grüssen
> Hannes Streicher mailto:HStreicher@...
>