HP laserjet 400 mfp and Laserjet 200 mfp

I have 2 printers HP Laserjet 200 mfp and HP Laserjet 400 MFP. I tried HP phone support. I checked each printer on 2 diffent networks to make sure it was not my setup. When I try and setup both printers with Web Services they both say unable to connect to the internet. I did a firmware update on both printers no help. HP told me that I needed to have a DMZ setup ie. port forwarding I don't think this is right.

Thanks

O.D. Smith (HP Retired)