Nobody has the root password anymore, but fortunately, it's vulnerable to at least seven remote root sunrpc exploits. We "log in" by running a Python script that pops a root shell.
No, I am not kidding.
Edit: Checked out records: purchased and brought online in 1993.
At one point decades ago there were a lot of these IPXs and their SCSI accessories on eBay and they were a decent source of project boxes because you could use the power supply and stick your project where the hard drive was supposed to be, with the wires coming out the SCSI port. It looks like the model 411 is still $30 or so on eBay but there are few.