problem with serverconnection no proxy

[Holms1]

I have a HP 6600 which is very good, but for some days ago I changed my internetadress to a new distributor, and since then the printer has not functioned through internet - it ask for proxyadress constantly

[Jeet_singh]

@Holms1,

Thank you for posting this on HP Support Forums!

I see from your post that you're having issues while connecting your printer to the network. Don't worry I'll be glad to help you.

Let's try to restore the printer to the network default settings, then run the Wireless setup wizard and then connect the printer back to the network and complete the setup.

To reset the printer's network settings:

1. Touch (right arrow), touch Setup, and then touch Network. Touch Restore
Network Defaults, and then touch Yes. A message appears stating that the
network defaults have been restored.

2. Touch (right arrow), touch Setup, touch Reports, and then touch Print
Network Configuration Page to print the network configuration page and verify
that the network settings have been reset.

Now  set up the printer using the Wireless Setup Wizard: 

The Wireless Setup Wizard provides an easy way to set up and manage a wireless connection to
your printer from the printer control panel.
1. Set up the printer hardware. See the getting started guide or the setup poster that came
with your printer.
2. On the printer control panel, touch (right arrow), touch Setup, and then touch Network.
3. Touch Wireless Setup Wizard, and then touch OK.
4. Follow the display instructions to complete the setup

Next thing, I would suggest here is to do a root level uninstall and reinstall of the printer drivers.

• Press “Windows key” + “r” to get the “Run” window.
• Type "services.msc" to get Services – Go to “Print spooler” – Right-click and “Stop” the service.
• Now again open "Run" - Type “spool” and ok - Go to PRINTERS folder - delete everything in that folder.
• Go to services again - Start the print spooler.
• Now check for issue resolution.
• If the issue persists, also try clean installing the printer drivers. Here are the steps:
• First, unplug the USB cable from the printer if present.
• Go to Control panel – Programs and feature – Select all the HP OfficeJet printer entries and uninstall them.
• Now go to Control panel – Devices and printer – Select all the printer entries and remove the device.
• Press the "windows key" + "r" to get the "Run" window open - Type "printui.exe /s" (There is a space between .exe & /) and press enter.
• Under print server properties, go to drivers - remove any entry there as well.
• Again, go to the Run window, type – “c:/programdata” – Go to Hewlett Packard folder, remove any printer related folders & files.
• Restart your computer.
• Please click here (Please select the correct Operating system and version of Windows before downloading and installing the full feature software for the printer).
• In the connection type window, select “Wireless” and follow the on-screen instructions to complete the installation.

Please let me know if this resolves the issue, or if you require further assistance!

that said, If the information I've provided was helpful, 

give us some reinforcement by clicking the solution and kudos buttons, 

that'll help us and others see that we've got the answers!

Good Luck.