Magento Web Service Calls Maintenance Mode – SOAP-ERROR: Parsing WSDL

I’ve had an ongoing issue with a Magento installation. When the maintenance mode is turned on (with access restricted to a few ip’s), web service calls using v2 SOAP API throws the following error:

SOAP-ERROR: Parsing WSDL: Couldn't load from 'http://**URL**/index.php/api/v2_soap/index/?wsdl=1' : failed to load external entity "http://**URL**/index.php/api/v2_soap/index/?wsdl=1"

The web service worked correctly when the site was not in maintenance mode.

After lots of research, managed to find the solution. Basically Magento itself was throwing the error as it uses the PHP SoapServer to create the API. This object needs access to Magento in order to function correctly. As maintenance mode was enabled, the SoapServer didnt have correct permission, so was getting the holding page and throwing the error.

In order to fix the issue, the IP address of the server needed adding to the exceptions for the maintenance mode. Full details on how to do this here – Magento Maintenance Mode

Once the IP was added to the white list, the web service calls started working again correctly.

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