SNMP monitoring for switches and firewalls
Overview
SNMP informs port errors, CPU, temperature—if community strings weak, you traded visibility for breach.
Hardening
SNMPv3 authPriv; restrict management VLAN sources; rotate credentials quarterly.
Polling intervals
Balance granularity vs CPU load on small switches.
Traps
Configure trap receivers for power supply failures; test with controlled pull.
Documentation
OID reference sheet per vendor model family in KB.
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