TCP - FR3 client/server connection timeout

With TCP/TLS I have a curious comportment Imagine this scenario: # server : port case (1) FR3:33001 -> radsecproxy:2083 case (2) radsecproxy: 44001 -> FR3:2083 For case (1) FR3 is the client, and radsecproxy is the server. Case (2) shows FR3 as a server of radsecproxy for TCP/TLS connections. In case (1) FR3 TCP connection always keeps ESTABLISHED with radsecproxy, but in case (2) FR3 closes its connection with radsecproxy (client) after less than 1 minute (sending a FIN, normal...). So, is it possible to set FR3 to don't send FIN and close the TCP connection with radsecproxy client? Thank you, --E