Every network interface can be used only in a single firewall profile at a time. As soon as a 
network interface is assigned to a new profile, it is removed from the old one. 
 
To apply the rules, click the Apply button that appears when changes are made into the firewall settings. 
4.1.11.4  List of Allowed IP Addresses  
This section allows configuration of the list of IP addresses allowed to be used by administrator to connect 
to the device via web interface and the Telnet/SSH protocols. By default, all addresses are allowed. 
 
 
 
  Access  only  for  allowed  IP  addresses—when  checked,  the  list  of  allowed  IP  addresses  is  used; 
otherwise, access is allowed from any address. 
 
  Apply—applies changes. 
  Confirm—commits changes. 
 
To create or remove a list of allowed addresses, use the following buttons:  
     Add; 
     — Remove.  
 
Upon  configuration  of  a  list  of  addresses,  click  the  Apply  and  Commit  buttons;  failing  to  confirm  the 
changes in 60 seconds restores the previous values. This allows user protection from loss of access to the device. 
4.1.12 Network Utilities 
4.1.12.1  PING 
This utility is used to check device network connection (route presence).