Hello,
I created a droplet 2 months ago and I did the basic things like configuring the firewall, setup ssh to only accept public key auth and stuff. Last night I was inspecting the logs located at /var/log/auth.log and /var/log/ufw.log and I noticed that there are a lot of IPs trying to access telnet, ssh (using brute force with random login names) and there are also some attempt to connect to some random TCP ports.
Should I be worried? Is this “normal” ?
Btw: My firewall is configure to drop all incoming packets (except ssh).
Thank you
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Accepted Answer
You can improve and reduce the attack attempts by:
- Disabling password passed authentication and using RSA SSH keys
- Configurig your firewall and ssh to only allow your IP (you need to have a static IP)
- Using 2FA, for example 2FA of Google
- Changing the SSH port
- Disable root Login via SSH
- Using a software that prevents DDOS attacks like DenyHosts or fail2ban
This is to be expected. Disabling password based authentication in sshd_config makes this a non issue.
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