My ELTEK Rectifier is imported in NPM using ICMP polling.
When I decided to change the polling method to "SNMP and ICMP" I get the message "Unable to validate this node with the supplied SNMP credentials"
The strange thing is that when I run snmpwalk tool with default settings (community - public, port - 161, SNMP version - 2c),
from the same machine, I get all available OIDs and contents
Any ideas of what I'm doing wrong?