IP Reputation Attacks

I have installed a NAS an enabled the NAS Firewall.  I have port forwarded 5000 to the NAS.  I am now getting several IP Reputation Attack messages from Xfinity Advanced Security, advising me to restart the NAS and disable any port forwards.  The NAS needs the port forwarded in order to properly connect to the NAS using available phone apps.  

Am I to disregard these messages from Advanced Security or should I be concerned about these supposed attacks?  

I have no warning messages from the NAS indicating any kind of attack or improper log in attempts.

Thank you