I am having problem with dedicated server I am hosting on Hetzner. I had similar problem few years before with other dedicated one and I am worried if this thing is my fault or someone other's.
It just hangs up. I can't login via SSH to it, open webpages (Timeout). I then have to hard-reset it via their administration tools. The last thing in /var/log/syslog is a CRON message (which otherwise works okay) and then a line of NULL chars
^@ followed by reboot initialized by myself.
How do I check what may be wrong? I tried memtester and it all went ok. I also tried googling for this a lot but found no useful answers. Oh and it is
Linux 4.9.0-8-amd64 #1 SMP Debian 4.9.110-3+deb9u6 (2018-10-08) x86_64 GNU/Linux
What else can I do?