Securing AF621 ports

[BradV]

We have an HP IP console switch G2 2x1Ex16 (AF621A) KVM switch running vs 1.34.0.24784.  There is a corporate push to make connections more secure.  I was able to set the https (tcp port 443) connection to only allow TLS vs 1.1 or 1.2.  However, the device also appears to be listening on tcp port 3871.  It is still listening on TLS vs 1 as well as 1.1 and 1.2.  I can't see anything in the configuration about it.  Does anyone know what this port is for and how to secure it?

Thanks!