Hello, I'm looking for a cups expert. I'm trying to set up a raspberry pi 3b+ to act as a printserver for my folks. The printers they have are an Epson nx420 all-in-one I think it's a printer/fax/scanner, does photos too, and a Brother hl5240dw laser printer. My goal is to make this pi setup as plug and play as possible i.e they plug in the brother via USB to the pi and the pi in. At that point when they tell me it's plugged in I vpn in to it, because I will have set up a ddns domain which will update with there IP address so for example using openvpn vpn in to homeip.net once there I can go to https://ip-address:631 and set up the epson. To that end I'm trying it here, I've got an HP laserjet 4200 connected directly to my orbi, which cups sees, which is kind of strange, but it does see it. The other printer is connected via USB and it is an HP laserjet p4515 and it's not being seen at all. Any ideas to get these printers to show up or any more suggestions appreciated. Thanks. Dave.
On 4/10/21 00:28, David Mehler wrote:
I'm looking for a cups expert.
I'm definitely not a CUPS expert. I've had to work with its debug logs a few times to resolve problems though. Increasing the log level may help. Also, if it's an older kind of printer, you need to specify a Postscript Printer Description (PPD) file. Newer printers, though, shouldn't require configuration - see this article: https://lwn.net/Articles/857502/ Regrettably, I don't have insight into your specific connection issues. For a network-based printer, make sure there isn't a firewall running on your host (e.g., iptables/nftables rules) that blocks the required port. This turned out to be the problem when I last had to debug a CUPS installation - easily fixed by opening the port, obviously. For the USB-based printer, I would start with the kernel logs to check that it's detected properly, then move on to the CUPS logs.
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David Mehler -
Jason White