Our network printer is spitting out unwanted print jobs which no one seems to collect. I want to know from which machine the jobs comes to the printer. We have PaperCut in our server but these specific jobs are printing without any entry in Papercut.
It's a bit of an open question depending on your network... but some kind of network traffic monitoring might be useful... https://en.wikipedia.org/wiki/Network_traffic_measurement
What kind of printer is it? There may be a function to print out the IP address of the sender, or better yet, print recent logs. You might need to enable logging first: http://smallbusiness.chron.com/check-printer-logs-54952.html
Is your printer and/or network behind a firewall? There are almost certainly firewall logs on your network... but that all depends on your network...
Alternatively, you could try unplugging the printer and pluggin a laptop, with fixed IP the same as the printer's (if your network allows this). Then you can monitor IP-based requests directly. (not a great idea, but probably one that I would try just for fun and if nothing else works). This might help if you're on a windows system: apparently I need more reputation to paste this link... google "nextofwindows tracking firewall activity with a windows 8 firewall log"
Let us know:
1) Printer model 2) Network type 3) Firewall status
Maybe we can help more?
Check the printer integrated log on the admin web interface, if your printer come with a log viewer.
Edited: As your printer does not have a log viewer, please use network monitor like wireshark to capture the packet from where they come. You can put a mirror port on your switch to capture or you can use a old hub, plugged in your printer and on a laptop to capture the packet.
The setup would look that way:
[switch] ----- [hub] ---- printer ---- laptop
After the packet capture, please check your DHCP to find some detail about who print.
A guide for wireshark there