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How to disable virtual cloud network firewall on Oracle Cloud

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When running VM instances on Oracle Cloud, you might want to use all ports, not just the few ports that are open by default. This post shows how to disable the Virtual Cloud Network firewall altogether. Additionally, you need to configure the instance firewall e.g. via SSH. For Ubuntu, see How to disable instance firewall on Ubuntu on Oracle Cloud.

You need to use firefox to access the UI. It will not work in chrome!

First login to the cloud network dashboard at https://cloud.oracle.com/networking/vcns

Now click the virtual cloud network:

Oracle Cloud virtual cloud network dashboard showing VCN list

Now click Security listson the bottom left:

Oracle Cloud VCN security lists menu in left sidebar

Click the Default security list (which has been automatically created)

Oracle Cloud default security list in VCN

Click Add Ingress Rules Oracle Cloud Add Ingress Rules button in security list

Enter source 0.0.0.0/0 (i.e. all IP addresses) and IP protocol All protocols:

Oracle Cloud ingress rule allowing all traffic from 0.0.0.0/0

Now click Save changes and don’t forget to configure your instance firewall

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