From Observium

The templates below will help you securely configure SNMP on your Cisco IOS (and IOS-XE) devices.

Text inside the <> brackets should be replaced to match your network.

IPv4 & IPv6 Named ACL

If you use both IPv4 and IPv6 and your host supports IPv4 and IPv6 named access lists for SNMP communities.

ip access-list standard SNMPv4 permit <Observium IPv4 address>

ipv6 access-list SNMPv6 permit ipv6 <Observium IPv6 address> any

snmp-server community <community> RO ipv6 SNMPv6 SNMPv4
snmp-server ifindex persist
snmp-server location <location>
snmp-server contact <lontact>

IPv4 Only Named ACL

If you only use IPv4 and your host supports IPv4 named access lists for SNMP communities.

ip access-list standard SNMPv4 permit <Observium IPv4 address>

snmp-server community <community> RO SNMPv4
snmp-server ifindex persist
snmp-server location <location>
snmp-server contact <lontact>

IPv4 Numbered ACL

If your host only supports numbered IPv4 access lists for SNMP communities. This is needed for older software and some low end switches.

access-list 1 permit <Observium IP>

snmp-server community <community> RO 1
snmp-server ifindex persist
snmp-server location <cocation>
snmp-server contact <contact>