This object is used to provide HOST IP ADDRESS AUTHENTICATION. Host IP address authentication can be performed two different ways, depending on whether there is a subnet mask provided in chasEntitySrcSubnetMask. If chasEntitySrcSubnetMask is not defined, then the host IP address (source IP address in the SNMP command PDU) must be equal to this object. If chasEntitySrcSubnetMask is defined, then the host IP address (source IP address in the SNMP command PDU) is ANDed with the chasEntitySrcSubnetMask, and the value must be equal to this object. If the values are equal, then that SNMP command is authorized the community access rights for the associated chasEntityCommunity, chasEntityIpAddress pair. NOTE 1: This is assuming that the community profile has been authorized. NOTE 2: Multiple source IP addresses can be defined for the same community name, internet address pair. See example at the begining of the chasEntityTable. For an entity which is not supporting host IP address authentication scheme, the value of this object is 0.0.0.0.