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Silly with rsnapshot

A bit silly. I tried setting up rsnapshot to make snapshots of the entire filesystem on my server. This apparently led to a fatal exception in the Linux kernel, probably when rsyncing /dev and especially /proc. It took a bit of time before it was fixed, but everything is working fine again. I'll make sure to first try silly things such as backup / localhost on my laptop.

fail2ban and sshd on non-standard port

Sometimes wifi connections only allow connections to a limited range of ports. In Israel connections to ports over 1024 were seriously throttled. So I put the SSH server of one machine on port 22. When going through /var/log/auth last week I found many bots trying to enter with standard names. So I installed fail2ban, today I'm checking and everything is working fine. For your own safety you can set up IP addresses that can always come through. Merely putting sshd on a non-standard port seems to be a more adequate way to keep bots out.