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How do I turn off the firewalls that are blocking the required ports?

How do I make sure firewall settings are not blocking the required ports?

Thanks Captain, This was the message I got when I typed hp-setup HPLIP cannot detect printers in your network. This may be due to existing firewall settings blocking the required ports. When you are in a trusted network environment, you may open the ports for network services like mdns and...

...and thank you for all your help.

Yes. I did input the command and it downloaded pages and pages of stuff. How do I install it? What do I click? What do I open? Again, I'm BRAND NEW at this.

Ok. I've downloaded the latest hplip file and it's in my download folder. But I don't know how to get it to run. The only choices it gives me is to open it using Word, text or to delete.

Great news. The download worked. I'm not quite sure WHAT it downloaded yet. But something is definitely downloaded. (It took 5 minutes)

apt search hplip did not work.

It's either penguin or crosh. When I go to apps and click terminal, it's my name and penguin. When I press ctrl+alt+t, it's crosh.

Captain Sensible, when I typed hp-setup in the terminal window, it said ERROR: unknown command: hp-setup I guess I didn't download and open hplip correctly.

Also, I'm not sure where to find the software center or Synaptic. I'm BRAND NEW to the Linux world. So step-by-step instructions on not just what to do, but how to get there (what to click, etc.) would be very helpful. And thank you all so much for taking the time to assist. I really...

I saw hplip-3.19.1.run in the download folder. But I don't know how to open it. It's asking if I want to use View, Office or Open with text. I don't know what to do from here.

Thank you all. I will look for the hplip. I thought I downloaded it but didn't really see anything that indicated I did it correctly.

Thanks, Warlock. It downloaded. Now what do I do?

Thank you. I went to the link but nothing happened. What should I look for?

Hi. I am brand new, just like Granny. I have an HP Deskjet 2544 printer. Is there a way I can use it with my Linux computer. I bought the computer without knowing it was a Linux system.

Hello. I am brand new to Linux (less than a week). I need to know if there is a way to use my current printer or if I need to buy a new one. It is an HP Deskjet 2544. Please, help. Thanks.