I have a NAS box that has updated itself last week, and ever since it has been connecting to a HUGE number of random IPs all over the world, none of which have WhoIs info... Seems suspicious, so I want to block that NAS from doing so. The connections are always from port 51413.
I know the fixed IP of the NAS, but I cannot find an entry anywhere for the "Client Port". How can I do this?