**OPNSense firewall - Basic configuration** 

====== allowing ICMP on your WAN interface? ======


  I had problems when trying PING to the firewall....When I started the firewall,  for a few moments the PING 
  worked and then few seconds after it stops to respond. From inside the OpnSense I could PING my Desktop but from 
  my Desktop can not PING the Firewall..
  
  My default "Default allow LAN to any rule" was disable because I want to control all the traffic that cames from 
  my LAN to my WAN.
  
  So, I had  to create a specific rule to allow ICMP traffic:
  
  Action: Pass
  Interface: LAN
  Protocol: ICMP
  ICMP type: Echo Request
  Source: LAN net
  Destination: This Firewall
  description: Allow Ping
  
  After this ( and this is important ) I need to run "States reset"  ( Firewall->Diagnostics->Stated Reset ) to 
  finally get the correct response of the PING to my Desktop.
  
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