PCI DSS Failing Signature Verification Failed Vulnerability

Hi there, 

We are running PCI Compliance scans on our network, each time we do we have an issue with both port 1000 and 1003 tcp over ssl. 

I have tried changing the SSL certificates we've used, and can't see any references to ports 1000 or 1003 in our config. 

We are running a Foritgate 400e on Firmware 7.3.