We need to add a profile for SNMP to use UDP 161.
- Edit /etc/firewalld/services/snmp.xml
<?xml version=”1.0″ encoding=”utf-8″?>
<service>
<short>SNMP</short>
<description>SNMP protocol</description>
<port protocol=”udp” port=”161″/>
</service>
2. Reload the firewall: firewall-cmd –reload
3. Add it to the public zone: firewall-cmd –zone=public –add-service snmp –permanent
4. Reload the firewall again.
It should be working now.