I am facing a very strange issue.
Today I have started my NAS and it wouldn't be reachable (neither the web interface nor smb nor Plex).
I have rebooted the server once more (an HP Gen 8 MicroServer) and still no client would be able to connect.
At that point I have restored the OS from a backup (I clone the OS drive weekly).
Now I do have network connectivity but I am seeing very strange behaviours for eth0.
On boot I can see the following.
Mon Aug 1 19:48:08 2016: Setting up resolvconf.../etc/resolvconf/update.d/libc: Warning: /etc/resolv.conf is not a symbolic link to /etc/resolvconf/run/resolv.confMon Aug 1 19:48:09 2016: done.Mon Aug 1 19:48:09 2016: Configuring network interfaces.../etc/resolvconf/update.d/libc: Warning: /etc/resolv.conf is not a symbolic link to /etc/resolvconf/run/resolv.conf
The same error, though, is not logged for eth1 (configured in the same way - static IP, different IP address in the same range).
If I try to run ifup & ifdown for eth0 I see the following:
Instead, if I do the same for eth1 I get a totally different output:
Then again, checking the ifstate file, it seems eth0 is not listed, adding it manually or removing the file, though does not seem to make any change.
I can't see anything wrong on /etc/network/interfaces.
I have also tried disabling and re-enabling eth0 from the WebUI (bearing in mind that the UI can be reached on the IP associated to the misbehaving interface).
I have tried to make amendments (as well as delete (/etc/network/run/ifstate) and reboot. Still I can't get out of this situation.
Does anyone have any idea/suggestion?