We're having issues with the WiFi connectivity on the printers that we're using on a current project. The printer connects fine, but the ports that should be opened are not opened. They work fine on the wired network. Their support has tried to help, but so far hasn't been able to provide a solution. I suspect that the printers run an embedded linux, and I wouldn't mind having a look at the configuration files to see if there's anything in there that's obviously broken. I've downloaded the firmware from https://printers.averydennison.com/en/home/resources/service-and-support/utilities-and-firmware/9419-printer.html , but binwalk doesn't seem to find anything useful. I don't see any magic bytes or anything that would hint as to the structure of the file, and while there are recognisable strings (including the beginnings of some of the web pages from the config interface), they seem to get truncated in odd places, and with FF inserted at seemingly random intervals between characters.
My thought was that it may be a disk image that could be mounted, but I would have thought that binwalk would have identified that.
While I'd appreciate the answer to how to examine this firmware, I'd also like to fill in some of the gaps that I'm missing in my process, so any hints on what I should be looking for would be greatly appreciated.