Static will only work if you have a static IP from the ISP. If not DHCP will work fine.
As per the online manual....
http://www.samsungcctvusa.com/files/upload/%5BManual%5D%20SMT-190DN.pdf
Login to router...
Click the “Application and Gaming” tab.
Click “Port Range Forward”.
Port forwarding
Row #1
Application : Set this to “HTTP”
Start and End : Set both to “From 1024
to 65535
Protocol : Select “TCP”
IP Address : SETUP MENU ->
5-9) NETWORK SETUP -> Check IP from
network status to apply it identically to Private
IP after DHCP setup.(Eng- Setup)
It is not in use by any other device connected to the IP
Router including the Local PC.
Enable : Leave this “checked”
Click “Save Settings”
Close browser window.
This is a great little setup they have going but is buggy communicating online. I have tried to get support from Samsung on this and NEVER received a single response on how to resolve the gateway problems I am encountering. But if you only have the WRT54G with above setup you will be good to go.