Problem

Cause

This message appears when Confluence attempts to check that the URL you are using to access Confluence is the same as Confluence's base URL, but cannot complete the check because of a problem with your proxy configuration. This is usually because:

• a proxyName and proxyPort are present in your <install-directory>/conf/server.xml file but you are not using a reverse proxy.
• you are using a reverse proxy, but the values for proxyName and proxyPort  are incorrect in your <install-directory>/conf/server.xml file. 

Solution

If you are not using a reverse proxy, make sure the proxyName and proxyPort attributes are not included.  Your connector should look similar to the example below if you are not using a reverse proxy:

<Connector port="8090" connectionTimeout="20000" redirectPort="8443"
     maxThreads="48" minSpareThreads="10"
     enableLookups="false" acceptCount="10" debug="0" URIEncoding="UTF-8"
     protocol="org.apache.coyote.http11.Http11NioProtocol" />

If you are using a reverse proxy, make sure the the proxyName and proxyPort attributes have correct values for your reverse proxy.  Your connector should look similar to the example below, and the recommended settings will be displayed in the warning.

<Connector port="8090" connectionTimeout="20000" redirectPort="8443"
     maxThreads="48" minSpareThreads="10"
     enableLookups="false" acceptCount="10" debug="0" URIEncoding="UTF-8"
     protocol="org.apache.coyote.http11.Http11NioProtocol" 
     proxyName="www.example.com" proxyPort="80" scheme="http"/>

If you still see this error after checking your server.xml, check your proxy configuration is also correct. The following pages provide example configurations.

• Tomcat config is incorrect warning in Confluence 7.11 or later when there are two reverse proxies
• Using Apache with mod_proxy
• Running Confluence behind NGINX with SSL
• Proxying Atlassian server applications with Apache HTTP Server (mod_proxy_http)
• Proxying Atlassian server applications with Microsoft Internet Information Services (IIS)
• How to configure Amazon Web Service Application Load Balancer with Confluence

Workaround

If the Base URL check continues to detect a problem, you can disable the check in your site:

1. Go to  > Manage Apps > System
2. Disable the Confluence Base URL plugin system add-on. 

The base URL warning should no longer appear.