title: IP_CONNTRACK vs NF_CONNTRACK
body: <p>I've a problem with a high load situation with two load balancers using NGINX. I want to tune some TCP parameters and get stuck with it.</p>
  
  <pre><code># sysctl -a | grep fin
  net.netfilter.nf_conntrack_tcp_timeout_fin_wait = 120
  net.ipv4.tcp_fin_timeout = 60
  net.ipv4.netfilter.ip_conntrack_tcp_timeout_fin_wait = 120
  </code></pre>
  
  <p>So there are parameters for <code>ip_conntrack</code> and <code>nf_conntrack</code> and there is also a third variable. Which of them do I have to set up? Distribution is Debian Wheezy.</p>