The MIB module is for creating and configuring
object groups to support packet filtering and
access control on IP and other protocols.
        
The cfgFilterGroupTable allows users to create
delete, and get information about filter groups.
Filter groups are uniquely identified by the 
group names.  Filter groups can either be of
network, protocol, service and icmp and filter
group type cannot be changed once it has been created. 
        
The cfgFilterNetworkGroupTable is used for managing
information about IP Addresses.
        
The cfgFilterIpProtocolGroupTable is used for managing
information about protocols.
        
The cfgFilterIpServiceGroupTable is used for managing
information about services(ports).
        
The cfgFilterICMPGroupTable is used for managing
information about ICMP protocol.
        
The cfgFilterNestedGroupTable is used for supporting
nesting of filter groups(i.e configuring filter groups 
inside the other filter groups).
        
Terminologies used:
    ICMP - Internet Control Message Protocol.