So I was running OMV 3 for at least a year, probably longer, with no issues. Pretty much an out of box install with the exception of docker running an emby instance. never a problem. We had a power outage here a few weeks back and I had to power the server back up. After about 2 or 3 days I couldnt access my emby server, checked and I couldnt access my smb shares either. Could still ping the server. Here is the odd bit. I could bring up the OMV web interface, but it would not accept my password. I tried to ssh in it wouldnt connect. I cant recall the error something rejected I think.
It worked after a restart but every day or so it would not work again and I would restart. sometimes I couldnt even get the web interface up but if I could it would reject the password. (not after the restart when it was working, I could log in and ssh successfully until the next time it quit working) I moved my server to a place I could plug in a keyboard and monitor this is connected to a different switch, it loaded fine and worked. I left it there A day later, it wasnt, so I tried to log in locally, it wouldnt accept the correct password until I restarted it. I formatted the system drive and installed OMV 4 since ive wanted to upgrade anyway. Worked for 3 day and again I cant access it. Web interface wouldnt accept the correct password. SSH would actually let me get to where I could see a log in prompt and type root but if I put the password in, it would unexpectedly disconnect per putty. oddly putting in the wrong password on purpose didnt disconnect, it would say error wrong password.
Since this started after a power outage im wondering if this might be an issue with the NIC but it did do this once while I was connected locally (rejected the correct password). Somehow its just refusing connections and rejecting PW. On two completely different installs. Not sure how hardware would do this but ???????
I also did run memtest and checked the smart for HD and found no errors
I might buy a discrete NIC and see if any difference as they are inexpensive. I am concerned about building a new box and then getting the same issue so trying to figure out exactly what is going on.