MPKI shows hasFaultResponse and SOAPDOMFault

Problem

What is the cause if MPKI login responds with a failure message and the diagnostics log contains hasFaultResponse and SOAPDOMFault.

E.g.

:05:37,448 method com.ubisecure.ubilogin.sso.ubilogin.authorizer.MethodMenuFilter: 
UbiloginAgent[CN=iam4-test,OU=apps.demo.ubilogin.com,OU=Target 
Applications,CN=Ubilogin,DC=eidm,DC=demo,DC=ubisecure,DC=com]:
[MethodStatus[password.1,true], MethodStatus[password.2,true], 
MethodStatus[mpki.elisa.1,true]] 
2012-10-16 10:05:45,589 method SignatureWorker.call enter txid=_zp17pls8eqh2, MSISDN=system 
2012-10-16 10:05:45,745 method SignatureWorker.call leave txid=_zp17pls8eqh2 
2012-10-16 10:05:45,745 method hasFaultResponse: com.ubisecure.etsimss.formats.impl.SOAPDOMFault@1c34b3c

Solution

This may indicate that the required port for communication with the MPKI MSSP is blocked or otherwise unreachable. Confirm that the endpoints listed in the configuration file are accessible from a browser on the same machine as Ubisecure SSO.