i have 2 systems conected in the same network via a 2wire modem, because i have a dynamic ip from my internet provider, i need to use the dynamic ip application, i name each computer with the different name for dipmap.com, but i type any of the names i ended wacthing just the same system via internet, my question is possible to watch both systems?

Yes, you will have to use port forwarding more advanced though.

If your ports are 80 and 3550

You can make DVR1 80 and 3550 straight through the router

Make DVR2 81 and 3551 in the router forwarded to 80 and 3550 internally to the second IP address.

You will only need 1 dynamic domain name but you could set one up on port 81 if you wanted.

thank you for your help, my modem is a 2wire with 4 ethernet ports, can you help me a little bit telling me how to do it, thank you in advance.

You are going to need to get the user manual for your router and see what it can do in forwarding. I assume since you already have one box going you have a basic setup to copy, just add 1 to the outside ports and point them to the second DVR's static IP.

Then when you connect to it you just need to add 1 to the ports to connect to the second box.

http://yourdomain.net <DVR1
If you don't specify a port web browsers will default to port 80.
http://yourdomain.net:80 <DVR1
http://yourdomain.net:81 <DVR2

Same goes for every other client connection method, even RDP if you have XPpro.

i thank you for all the help, i was able to fix my problem, i just let my domain the way it is for the default 80 port and added :81 to my second system, i didnt need to do anything else.