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Disable Ubuntu firewall on OCI

Enable-Disable-UFW

By default, Ubuntu comes with a firewall called UFW (Uncomplicated Firewall). While it is a useful tool for protecting your system from unauthorized access, sometimes it can cause issues when running certain applications or services.

TL; DR

sudo iptables -F
sudo netfilter-persistent save
  • iptables -F: Flush (remove all) iptables rules
  • netfilter-persistent save: Save empty ruleset to disk so it will be reloaded on reboot.

Reference

  • https://ubuntu.com/server/docs/firewalls
  • https://www.digitalocean.com/community/tutorials/how-to-set-up-a-firewall-with-ufw-on-ubuntu
  • https://www.cyberciti.biz/faq/how-to-configure-firewall-with-ufw-on-ubuntu-20-04-lts/
  • https://help.ubuntu.com/community/UFW

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