Hello @kub1xonek
The 403 Forbidden error you're seeing when using the LibreLogin plugin on your Minecraft server behind Azure Application Gateway is due to misconfigurations in routing or security settings.
Here are a few steps you can try to troubleshoot the issue:
1.The first step in troubleshooting the 403 Forbidden Error is to verify the health of your backend servers.
Navigate to your Application Gateway resource.
Click on the "Backend health" tab.
Check the health status of your backend pool members.
If the health status is "Healthy," proceed to the next step. If it's "Unhealthy," investigate the backend servers and resolve any issues found.
2.Azure Application Gateway provides access logs, performance logs, and firewall logs that can help you identify the cause of the 403 Forbidden Error. You can enable and configure logging by following https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-diagnostics
Once logging is enabled, analyze the logs to identify any issues with the Application Gateway configuration, backend servers, or client requests.
3.Look at the Access Control (IAM) settings for your Application Gateway. Ensure that the correct rules and permissions are in place to allow traffic from your Minecraft server.
4.Inspect WAF Policies: If you're using a Web Application Firewall (WAF) with your Application Gateway, review the WAF rules. It's possible that a rule is blocking legitimate traffic. You may need to tweak the rule settings or create an exception.
5.SSL Configuration: If you have SSL settings configured, verify that they are correct. If your server requires secure connections, ensure the Application Gateway is set up for end-to-end SSL if needed.
If the above steps didn't help, please provide the following details:
- Have you recently changed any settings or configurations in your Application Gateway or Minecraft server?
- Are there any specific custom rules defined in the WAF that could be affecting the connection?
I hope this information is helpful! If my answer helped you resolve your issue, please consider marking it as the correct answer or Upvote. This helps others in the community find solutions more easily. Thanks!