SNMP DoS/DDoS mitigation

**Finally** - here we are: **SNMP DoS/DDoS mitigation** ( using a rather simple approach )


Requests per minute are stored by IP ( DoS ) and overall ( DDoS ) and checked against
configured per-snmp-command thresholds.

If requests_per_minute exceeds the corresponding threshold, requests is not
handled and/or answered until the rpm drops under threshold again ( = a new minute started ).