In last 2 weeks I changed my radius provider to Icon Radius.
They Use SNMP and API services for their purpose to utilise function in portal.
It's causing memory filling so fast that in 1 week it's grabs 700mb memory and when free memory reaches 3gb mark ( when restarted it's 3.8gb free ) this ccr get reboot.
Log shows reboot by watchdog timer, raised ticket to support but not a single reply in month.
Also, since then, I was getting syn flood attack on my public ip pool.
Then I blocked ( chain input and action tarpit ) all external traffic other than my allowed pool.
.
I don't know what's causing this.
Radius support says configuration is ok, there no issue.