Vyos "falls" every day. How do we see logs?

In the last couple of days, each morning the Vyos “falls”. When i mean falls, it means that all rules and such stop working. However, you can connect to the vyos and you can ping it. it simply stops working.

I wanted to look at the logs, but i see that the logs that i looked at are “partial”. So i have a few questions:

  1. How can we see logs of errors / troubles etc’.
  2. Do we need to config such log rules? or it, by default, logs all errors and downtime and such.
  3. Do you have any idea what to check other then logs?.
  4. Which logs should I look at?.

As always, would be happy to learn more.
Thank you.

start looking in dmesg and /var/log/messages