What is your issue ? I also have many such attempts on many servers.
But if a few things to know :
If there is no server listening to a specific TCP/UDP port you don't see connexion's attemps and beleieve me, hackers try to connect to a wide range of TCP/UDP ports when they do their scans so when your ESET warn you about this TCP port cnx attempt your router may have received tons of attempts on other ports you didn't see.
If you access a server protected by a strong login/password AND the server that answer to this port has no security flaw then you risk nothing (expect may be some DDoS).
If you really want security then do not expose any server/port with a NAT but create a VPN that will be the only way to access your local network.