Notification of excessive access due to a mistake

1

During testing my created applications, I triggered unintended DDoS attacks that could be happened. I wonder if this could be affected by service degradation for your htp pool service especially for the JP region. Could I take any actions on my side?

In detail, I saw that a previous discussion a capability for service that is service per second, as of that data my unintended requests could be relatively heavier than the ordinary usages of JP region ntp pool service in 2018( Current Pool Capacity? ). This could be differed from the current status but I wanted to make crystal-clear with the current situation to excuse my unintended DDoS-like attacks that are not intended to take down the ntp pool service.

-– Related Information on the Excessive Access —

Target: jp.pool.ntp.org

Frequency: 100 requests every 10 seconds (600 requests/min)

First time: From 14:30 JST on August 24, 2025, for 90 minutes with 54,000 requests

Second time: From 22:30 JST on August 24, 2025, for 30 minutes with 18,000 requests

2

Hello,

The publicly available logs of pool NTP servers do not go that far back in the past, but it is unlikely that your activity caused any significant problems for the pool. Many NTP servers in the pool have rate limits and they will simply reduce the responses sent to your servers if the operator-defined threshold is exceeded.

It’s good that you have taken care of the problem now, though.