Can't connect HP Photosmart C4780 to my wireless network

Evertime I try to connect my HP Photosmart C4780 to my wireless network I get this message:
"Your computer is unable to communicate with your printer at 192.168.1.127. This may be caused by firewall software. If you are using firewall software, verify that UDP port 427 is unblocked for both inbound and outbound traffic.
Your PC can not communicate with your printer at address 192.168.1.127. Check all cable connections. Check that the printer, PC and router are powered on and connected to the network."
I have tried turning my firewall software off and that didn't work. All cables are connected and everything is powered on.
OS: WIndows 7
WIreless Router: Cisco Linksys Series Router E1000
-Elliott Crouch
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Thanks for your quick reply, PrintDoc! Just a few minutes ago I tried unplugging my router and plugging it back in and "Wallah!" everything connected! It's working perfectly now!

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Hi @Northwest-John,
I see by your post that you are unable to setup the printer on the wireless network. I can help you.
Update the printer's firmware by the USB connection just to make sure that isn't causing any issues with the printer's Embedded Web Server (EWS) not allowing the proper changes. HP LaserJet P1102w Firmware Update Utility.
The newest version is 20130703, which you can compare by printing the configuration page.
Power cycle the router and restart the Mac.
The printer won't recognize the network name if there usually is any symbols or spaces in the network name.
Make sure Safari is set as the default browser. Sometimes the Embedded Web Server (EWS) won't open in other browsers. Open Safari, across the top select the Safari menu, select Preferences, General, set as default.
Turn the printer off, hold down the wireless button and cancel (x button) while turning the printer back on and don't release the two buttons until the printer stops making noise.
Print out a configuration report and make sure the SSID and IP address are cleared.
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Connect the USB cable from the printer to the Mac.
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Click system preferences.
Click the print and fax icon.
Highlight the printer and click on the - sign to delete the printer. (USB driver)
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Close any applications.
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Then delete the USB driver and add the network printer.
Let me know if you are still having issues with filling out the EWS for the printer.
Have a nice day!
Thank You.
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos Thumbs Up" on the right to say “Thanks” for helping!
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Hi
I am trying to connect my HP Photosmart C4780 to my wireless network at home.
Each time I try to configure my printer to my wireless network I keep getting the following HP Network Diagnostics Error Message:
Problems may exist with network functions of the printer. Please try to fix the issue then click Retry or click Next to continue. See details below.
Your printer is unable to communicate with your printer at 192.168.1.69. This may be caused by firewall software. If you are using firewall software verify that UDP port 427 is unblocked for both inbound and outbound traffic.
Your PC cannot communicate with your printer at address 192.168.1.69. Check all cable connections. Check that the printer, PC and router are powered and connected to the network.
MY QUERY - I have AVG 2011 security software installed on my laptop which I presume contains firewalls. But I do not know how to "verify that UDP port 427 is unblocked for both inbound and outbound traffic". How do I do this?
i am not a tech expert so would appreciate as much help as possile with this as right now I cannot use my printer as it keps showing as Offline.
Many thanks
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Go into the AVG menu and simply disable the firewall and retest.
Say thanks by clicking "Kudos" "thumbs up" in the post that helped you.
I am employed by HP

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Hi,
An HP Full Feature Software is not available for Mountain Lion, therefore the Wireless configuration is tricky and cannot be done through the software.
To connect the printer to your wireless network you will need to create a temporary wireless ad hoc connection, then the wireless connection to your router can be configured via the EWS page:
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Touch the ATM button ( ) next to Wireless Menu .
Touch the ATM button ( ) next to Wireless Settings .
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Can't connect HP Photosmart C4780 to my wireless network

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