Filter Example

A filter for blocking the NetBIOS packets


The NETBIOS protocol is used to share a Microsoft comupter of a workgroup. For the security concern, the NetBIOS connection to a outside host is blocked by ZyAIR router as factory defaults. Users can remove the filter sets applied to menu 3.1 and menu 4.1 for activating the NetBIOS services. The details of the filter settings are described as follows.

The packets need to be blocked are as follows. Please configure two filter sets with 4 and 2 rules respectively based on the following packets in SMT menu 21.

Filter Set 1:

Filter Set 2:

Before starting to set the filter rules, please enter a name for each filter set in the 'Comments' field first.  


                       Menu 21 - Filter Set Configuration

     Filter                               Filter
     Set #      Comments                  Set #        Comments
     ------  -----------------            ------  -----------------
       1      NetBIOS_WAN                   7      _______________
       2      NetBIOS_LAN                   8      _______________
       3      _______________               9      _______________
       4      _______________              10      _______________
       5      _______________              11      _______________
       6      _______________              12      _______________
 

                    Enter Filter Set Number to Configure= 1
                    Edit Comments=
                    Press ENTER to Confirm or ESC to Cancel:
 

Configure the first filter set 'NetBIOS_WAN' by selecting the Filter Set number 1.

 

 

 

 

 

 

 

Configure the second filter set 'NetBIOS_LAN' by selecting the Filter Set number 2.