Table (4 entries) containing a list of IP addresses or DNS name of workstations permitted to issue SET requests. Such a workstation is called a Set client. If this table is empty then any SET request with a matching SET community string is allowed. If at least one Set client is specified, then an incoming SET request must have its source IP address or name matched against an entry in this table before the SET is allowed. An Set client entry whose IP address is 0.0.0.0 is considered invalid and will be ignored. This table is considered empty when all Set client addresses are zeroes (0.0.0.0). and DNS names are empty