title: how to stop crontrack sessions
body: <p>I have router with linux system based. I have the related SDK to customize the linux system of the router.</p>
  
  <p>When I disable a port forwarding from iptables rules, the running crontack sessions do not go down and keep established.</p>
  
  <p>I want to stop all running crontack sessions when I disable a port forwarding from iptable rules. I mean, only remove the crontack sessions related to the removed rule. So stop all crontack sessions with dest IP (lan IP) = the dest IP of removed rule.</p>
  
  <p>How to do that in kernel space? how to develop a kernel module that go over all crontack session and check the destination IP and remove only the session with a given ipaddress? are there some link for that?</p>
  
  <p>Otherwise are a user space way ( C functions or Linux commands) to stop specific crontack sessions ?</p>