APC ACRP100 User Manual

All user names, passwords, and community names for SNMP are transferred over the network 

as plain text. If your network requires the high security of encryption, disable SNMP access or set the 
access for each community to Read. (A community with Read access can receive status information and 
use SNMP traps.)

When using InfraStruXure Central to manage a cooling unit on the public network of a system, you must 
have SNMP enabled in the cooling unit. Read access will allow InfraStruXure Central to receive traps 
from the cooling unit, but Write access is required while you use the interface of the cooling unit to set 
InfraStruXure Central as a trap receiver.

Use the options under SNMP on the left navigation menu to configure the following:

For detailed information on enhancing and managing the security of your system, see the 
Security Handbook, available on the Utility CD or from the APC Web site, www.apc.com.

access

Enable SNMPv1 Access: Enables SNMP version 1 as a method of communication with this 
device.

access 
control

You can configure up to four access control entries to specify which Network Management 
Systems (NMS) have access to this device. The opening page for access control, by default, 
assigns one entry to each of the four available SNMPv1 communities, but you can edit these 
settings to apply more than one entry to any community to grant access by several specific IP 
addresses, host names, or IP address masks. To edit the access control settings for a community, 
click its community name.
• If you leave the default access control entry unchanged for a community, that community has 

access to this device from any location on the network. 

• If you configure multiple access control entries for one community name, the limit of four 

entries requires that one or more of the other communities must have no access control entry. 
If no access control entry is listed for a community, that community has no access to this 
device. 

Community Name: The name that a NMS must use to access the community. The maximum 
length is 15 ASCII characters, and the default community names for the four communities are 
"public", "private", "public2", and "private2".

NMS IP/Host Name: The IP address, IP address mask, or host name that controls access by 
NMSs. A host name or a specific IP address (such as 149.225.12.1) allows access only by the 
NMS at that location. IP addresses that contain 255 restrict access as follows:
• 149.225.12.255: Access only by a NMS on the 149.225.12 segment.
• 149.225.255.255: Access only by a NMS on the 149.225 segment. 
• 149.255.255.255: Access only by a NMS on the 149 segment.
• 0.0.0.0 (the default setting) which can also be expressed as 255.255.255.255: Access by any 

NMS on any segment.

Access Type: The actions a NMS can perform through the community.
• Read: GETS only, at any time.
• Write: GETS at any time, and SETS when no user is logged onto the Web interface or control 

console.

• Write+: GETS and SETS at any time. 
• Disabled: No GETS or SETS at any time.