Setting Up5-72 9161-A2-GH30-30April 1998Setting Up SNMP NMS SecurityUse the SNMP NMS Security Options (see Table 5-16) to specify whether asecurity check is performed on the IP address of SNMP management systemsattempting to access the node.Configuration Edit/Display →Management and Communication →SNMPNMS SecurityTable 5-16. SNMP NMS Security Options (1 of 2)NMS IP ValidationPossible Settings: Enable, DisableDefault Setting: DisableDetermines whether security checks are performed on the IP address of SNMPmanagement systems attempting to access the node. Allows access only if IP addressof the sending manager is listed on the SNMP NMS Security Options screen.Enable – Performs security checks.Disable – Does not perform security checks.Number of ManagersPossible Settings: 1 – 10Default Setting: 1Specifies the number of SNMP management systems that are authorized to sendSNMP messages to the T1 access unit. An IP address must be configured for eachmanagement system allowed to send messages. Configure the IP addresses in theNMSn IP Address configuration option.1 – 10 – Specifies the number of managers allowed to send SNMP messages.NMSn IP AddressPossible Settings: 000.000.000.000 – 223.255.255.255, ClearDefault Setting: 000.000.000.000Specifies the IP address that identifies the SNMP manager(s) authorized to send SNMPmessages. If an SNMP message is received from the NMS whose IP address does notmatch an address contained in this field, access is denied and an authenticationFailuretrap is generated. If a match is found, the type of access (read-only or read/write) isdetermined by the corresponding access level.000.000.000.000 – 223.255.255.255 – Adds or changes the NMS IP address. The firstdigit (i.e.,xxx.255.255.255) cannot be 127; 127 is a reserved number.Clear – Clears the NMS IP address and fills the address with zeros(i.e., 000.000.000.000).
