Allow Outbound Reply

If your outbound traffic is restricted and you need to allow outbound ICMP ECHO REPLY traffic, you can achieve this by adding a specific outbound rule to your Exoscale Security Group. This guide will help you configure the rule to permit ICMP Type ECHO REPLY (type 0) with no code, ensuring proper ping functionality.

Steps to Allow Outbound Reply

  • Access the Exoscale Portal

    • Log in to your Exoscale account.
    • Navigate to the Compute section and access your instance.

  • Select Security Group

    • From your instance details, locate the Security Group settings.
    • Choose the relevant security group to which your instance is attached. This is the group where you’ll add the outbound rule.

  • Configure Outbound Rule

    • Within the selected Security Group, go to the Outbound Rules section.
    • Click on the Add Rule button to begin creating a new outbound rule.

  • Specify ICMP Protocol

    • In the protocol selection, choose ICMP.
    • Set the Type to ECHO REPLY (type 0).
    • Leave the code field as NO CODE since no specific code is required for this ICMP type.

  • Restrict Destination (Optional)

    • If desired, specify a destination IP address or network range to restrict which IPs can receive outbound ECHO REPLY messages. By default, this will be open to all.

  • Save the Rule

    • After configuring the rule parameters, click on ADD to save the changes.
    • Allow some time for the changes to take effect and propagate through your instance setup.

  • Verification

    • Test your configuration by performing a ping operation from an internal service or monitoring tool. The outbound ICMP ECHO REPLY responses should now be successful.