If  the  default  inbound  rule  is  set  to  Allow  for  NAT-enabled  WANs,  no  inbound  Allow  firewall  rules  will 
 be   required   for   inbound   port   forwarding   and   inbound   NAT   mapping   rules.   However,   if   the   default 
 inbound rule is set as  Deny  , a corresponding Allow  firewall rule will be required. 
 21.1.2   Apply Firewall Rules to PepVpn Traffic 
 When  this  option  is  enabled,  Outbound  Firewall  Rules  will  be  applied  to  PepVPN  traffic.  To  turn 
 on this feature, click   , check the  Enable  check box,  and press the  Save  button. 
 21.1.3   Intrusion Detection and DoS Prevention 
 Pepwave  routers  can  detect  and  prevent  intrusions  and  denial-of-service  (DoS)  attacks  from  the 
 Internet.   To   turn  on  this  feature,  click   ,  check  the  Enable  check  box,  and  press  the  Save 
 button. 
 When  this  feature  is  enabled,  the  Pepwave  router  will  detect  and  prevent  the  following  kinds  of 
 intrusions and denial-of-service attacks. 
 ●   Port scan 
 o   NMAP FIN/URG/PSH 
 o   Xmas tree 
 o   Another Xmas tree 
 o   Null scan 
 o   SYN/RST 
 o   SYN/FIN 
 ●   SYN flood prevention 
 ●   Ping flood attack prevention