Unable to find/connect printer with Web Services Devices - Gold

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Kenneth Robinson

• April 07, 2022 00:08

The Setup:

ISP Router(with Wifi) -> Firewall Gold -> Unifi APs

I am unable to find or manually connect to my printer (only has wifi interface) when the computer and printer are connected to the unifi APs. If I try to domain name (as configured in the APP) or the IP address (static IP lease via DHCP), I keep getting the following error:

Windows couldn't connect to the printer/ Check the printer name and try again. If this is a network printer, make sure that the printer is turned on and that the printer address is correct.

When I do a constant ping to IP or domain name there are no drops. I have no issue accessing the printer's UI via the IP or domain name.

I have this same issue on two different computers.

If I connect the printer to the ISP wifi, there is no issue installing or printing.

Before I installed the Firewalla Gold, I had the exact same setup but I was using an openwrt router. Both computers were able to install or print when connected to the Unifi APs.

 

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  Firewalla

  • April 07, 2022 02:38

  Are you segmenting your network in anyway? And when you are printing, are you on unifi AP?

  Are you running Firewalla Gold in router mode?

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  Kenneth Robinson

  • April 07, 2022 13:26

  I have two network segments (home and work). The printer, laptops and unifi AP are all connected to the home network. We are trying to print from the home network. The work network has no need for printer.

  firewalla gold is in router mode.

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  Firewalla

  • April 07, 2022 16:04

  Have you tried to reboot your printer? when you have a connection like that, your printing traffic will NOT even go through firewalla since they are local. 

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  Kenneth Robinson

  • April 18, 2022 19:48
  • Edited

  Yes I have tried to reboot the printer and did an firmware upgrade as well, no difference

   

  I was able to manually add the printer (as a web services device), but I had to add a rule on the printer to allow all bi-directional traffic. It still does not detect the printer when I do a scan.

  I have no idea why the rule is needed as the computer and printer are on the same local network, or why it started happening when I swapped the openwrt (no issue scanning for the printer) to firewalla. I double checked my settings on the openwrt and there were no rules in place.

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  Firewalla

  • April 18, 2022 20:12

  Do you have any rules that may impact traffic? used a DNS server? 

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  Kenneth Robinson

  • April 19, 2022 12:48

  I have a second network segment (work) and there are rules in place to prevent traffic between the networks. However, I am not trying access the printer (which is on the home network) from the work network.

  Before adding the rule I was unable to manually add the printer via either the IP address or DNS name. The DNS name is configured in the firewalla app.

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  Firewalla

  • April 19, 2022 23:28

  If you can still ping the printer, then the issue is unlikely related to firewalla. If you can't, then tap on devices, find your printer, and turn on the emergency access for it. If emergency solves the issue, then likely you have a rule that may be blocking

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