Learn what to do when HAProxy ACL is not working. Our HAProxy Support team is here to help you with your questions and concerns.

HAProxy ACL is not working | Troubleshooting Tips

If you have trouble getting the HAProxy ACLs to work as expected, you are in the right place.

Here are some of the common reasons why HAProxy ACLs may not work and how to fix the issue:

• First, check the syntax of the ACL definitions in the HAProxy configuration file. Additionally, check if we have used the correct ACL keywords and conditions.
• Then, is time to verify that ACLs are defined in the correct section of the configuration file.
• Additionally, HAProxy evaluates ACLs in the order they are defined. So, we have to make sure that the ACL expected to match is defined before the ACLs that might match more broadly.

  If we have a generic ACL defined before a specific one, the generic ACL will match first and override the specific ACL.
• Furthermore, if we are using regular expressions with our ACLs, make sure that the regex patterns are correctly formatted and match the criteria.
• Then, we have to use HAProxy’s logging capabilities to log ACL evaluation results for debugging.
• It is also important to be careful about case sensitivity when matching headers, variables, or other request/response elements in ACL conditions.
• After making changes to your HAProxy configuration file, make sure we have reloaded or restarted HAProxy.
• Furthermore, take a look through the HAProxy logs for any error messages related to ACL evaluation.
• Finally, it is a good idea to verify that ACLs are evaluated within the context of the section where they are defined.

If the above tips do not work, the issue may be due to an external factor. These include changes in client behavior, network configurations, etc.

Let us know in the comments which one of the above troubleshooting tips helped you when your HAProxy ACL is not working.

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Conclusion

In brief, our Support Techs demonstrated how to fix the HAProxy ACL is not working error.

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