ELEKTOR FORUMS

in the May 2008 issues it says that you can only use 1 Digitbutler on your home network.

However it is possible to use more then one Digibutler at least in Holland so it should be possible to do this in any country. So here is how to.

When you call an IP adress in your web browser it automatically calls port 80 of that IP.
But you can call any port if you want to, by doing so you can remap other ports to internal ip and ports.

An example is appropriate I think.
Normally when you use one Digibutler (db) on your network (port 80 used):
your external IP: 86.131.222.120
Internal IP of db: 192.168.0.2
calling db from a browser: 86.131.222.120

so this would be the remap in your router:
external port: 80 to
internal IP: 192.168.0.2 internal port 80

Now we are going to connect a second db that uses external port 27888:

db1 (connected to external port 80):
your external IP: 86.131.222.120
Internal IP of db: 192.168.0.2
calling db1 from a browser: 86.131.222.120

db2 (connectod to external port 27888)
your external IP: 86.131.222.120
Internal IP of db: 192.168.0.3
calling db2 from a browser: 86.131.222.120:27888

So this would be the remap in your router:
for db1:
external port: 80 to
internal IP: 192.168.0.2 internal port 80
for db2:
external port: 2788 to
internal IP: 192.168.0.3 internal port 80

I hope you find this information useful.

regards, Tim G
on elektor forum: timmiee (the Dutch forum of Elektor)
on circuitsonline.net: timmie (a Dutch electronics forum)