Started off by

  1. Enabling unattended updates
  2. Enable only ssh login with key
  3. Create user with sudo privileges
  4. Disable root login
  5. Enable ufw with necessary ports
  6. Disable ping
  7. Change ssh default port 21 to something else.

Got the ideas from networkchuck

Did this on the proxmox host as well as all VMs.

Any suggestions?

  • radiantxero@alien.topBEnglish
    1·
    1 year ago

    Anything that has internet access like your IoT can be C&C utilizing stateful connections. An outbound socket is built, and reflected traffic can come back in. Your IoT devices especially should not be exposed to the internet. They can’t even have an antivirus agent installed on them.