Siemens SIMATIC S7-1200 CP 1243-8 IRC Operating Instructions Manual page 119

SNMP
● "Enable SNMP"
If the option is enabled, communication via SNMP is released on the device. As default,
SNMPv1 is enabled.
If the option is disabled, queries from SNMP clients are not replied to either via SNMPv1
or via SNMPv3.
● "Use SNMPv1"
Enables the use of SNMPv1 for the device. For information on the configuration of the
required community strings see below (SNMPv1).
● "Use SNMPv3"
Enables the use of SNMPv3 for the device. For information on the configuration of the
required algorithms see below (SNMPv3).
SNMPv1
The community strings need to be sent along with queries to the device via SNMPv1.
Note the use of lowercase letters with the preset community strings!
● "Reading community string"
The string is required for read access.
Leave the preset string "public" or configure a string.
● "Allow write access"
If the option is enabled write access to the device is released and the corresponding
community string can be edited.
● "Writing community string"
The string is required for write access and can also be used for read access.
Leave the preset string "private" or configure a string.
Note
Security of the access
For security reasons, change the preset and generally known strings "public" and "private".
SNMPv3
The algorithms need to be configured for encrypted access to the device via SNMPv3.
● "Authentication algorithm"
Select the authentication method to be used from the drop-down list.
● "Encryption algorithm"
Select the encryption method to be used from the drop-down list.
CP 1243-8 IRC
Operating Instructions, 02/2018, C79000-G8976-C385-03
Configuration
4.16 Security
119