title: can't connect to vulnserver using netcat
body: <p>I am not able to connect to vulnserver using netcat.
  I type this to connect
  <code>nc -nv 192.168.70.130 9999</code></p>
  <p>(UNKNOWN) [192.168.70.130] 9999 (?) open
  and it says this forever and doesn't happen anything</p>
  <p>I have disabled real time protection, allowed in firewall and also VM is set to NAT mode.</p>
  <p>Is there any other way to connect or what might be the possible issue.</p>