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Guides - Apply Firewall Rules to a Compute Instance

Updated , by Linode

A free cloud-based firewall service that makes it easy to secure network traffic to and from Compute Instances.

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Each Cloud Firewall can be applied to one or more Compute Instances. Use the steps below to view and modify the Compute Instances using this firewall.

  1. Log into your Cloud Manager and select Firewalls from the navigation menu.

  2. From the Firewalls listing page, click on the Cloud Firewall that you would like to use. This takes you to the Rules page for that firewall.

  3. Click on the Linodes tab to see a list of all Compute Instances that are currently using this Cloud Firewall.

Add Compute Instances

To add a Compute Instance to this firewall, click on the Add Linodes to Firewall button. In the form that appears, select the desired Compute Instance from the dropdown menu and click Add. Once added, all rules configured on this Cloud Firewall are applied to this Compute Instance.

Note
You can apply the Cloud Firewall to more than one Linode service at a time. Repeat this process to add additional Compute Instances.
Important
If Network Helper has been disabled on this Compute Instance and the internal networking configuration uses DHCP for IPv4 address assignment, some additional firewall rules are necessary. You must edit the Cloud Firewall to allow DHCP traffic through port 67 and 68. If needed, a full list of IP addresses for our DHCP servers can be found in our DHCP IP Address Reference Guide.

Remove Compute Instances

To remove a Compute Instance, locate the instance within the list and click the Remove link. The rules configured on this Cloud Firewall are no longer applied to this Compute Instance and, as such, the instance may be less protected against malicious traffic or attacks.

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