____________________________________________________________________________________ 
____________________________________________________________________________________ 
VoIP subscriber gateways  73 
–  High Security – incoming traffic is forbidden (from WAN to WLAN), outputting traffic (from WLAN 
in WAN) is forbidden. 
You may set the  rules permitting reception/transmission traffic to specific address in the ‘Firewall rules’ 
submenu. 
To save changes  into  the device operative memory, click ‘Save changes’ button. To record settings into 
the non-volatile memory, click ‘Apply’ button.  
3.1.5.2 ‘Firewall Rules’ submenu 
Use the submenu to set transit traffic rules.  
 
Description of ‘Firewall rules’ table. 
Firewall rule configuration:  
To add new rule, click ‘Add’ button and fill in the following fields: 
–  Name – user-friendly character name of rule; 
–  Traffic type –type selection of traffic that satisfies this rule:  
–  INPUT  – incoming traffic. When this  traffic type is selected, the  following fields will be 
available for editing: 
  Starting source IP address – specify start IP address of source. You may assign subnet 
mask after ‘/’ symbol (for example 192.168.16.0/24) to extract all the address range. 
When ‘Address number of source’ parameter is not taken into; 
  Number of source IP addresses – use the field to specify address range of source, if 
address mask of source is not specified; 
–  OUTPUT – outgoing traffic. When checked, the following fields will be available to edit:  
  Starting  destination  IP  address  –  specify  destination  IP  address.  After  ‘/’  you  may 
assign  subnet  mask  (for  example,  192.168.18.0/24)  to  extract  all  the  range  of 
addresses.  When  mask  is  assigned,  ‘Destination  address  number’  is  not  taken  into 
account; 
  Number of destination IP addresses – use this field to assign address range of receiver 
if receiver mask is not specified;