I have RUT955 with Upnp activated, hooked up with a server. The server should be requesting only two routable ports, one for TCP, another one for UDP calls. Looking at the routing table, the router has leased dozens of ports obviously not releasing them from earlier lease.
The router is of legacy series, installed September 2020. I recently upgraded the firmware to the latest available for the legacy routers.
Any idea what may be causing this and where should I start looking into this ?