Actual Measurement Report On The Defense Effectiveness Of U.s. Miaozhi High-defense Server Against Short-term Sudden Attacks

based on multiple rounds of controlled stress tests and real traffic replays, this article summarizes the real-time detection capabilities, delay mitigation, and business availability recovery performance of u.s. node high-defense servers in the face of short-term and sudden network attacks. it also puts forward deployment and optimization suggestions for adapting to different business scenarios to facilitate operation and maintenance and selection reference.

which test scenario can reflect the real short-term burst attack effect?

in order to be close to actual combat, this test selected three common short-term burst scenarios: 1) http request surge (sudden concurrent get/post in a short period of time); 2) udp/icmp short-term flooding; 3) syn/connection exhaustion burst. the test traffic source simulates global multi-point amplification, focusing on the us node entrance. the results show that high-defense servers deployed in the united states can recover normal connection rates within a short time after the policy is issued and takes effect in response to a short-term (a few seconds to more than ten seconds) request surge. this is especially significant in handling peak application layer requests.

how many key indicators of short-term burst attacks need to be monitored?

to evaluate the protection effect, at least the following indicators should be monitored: peak bandwidth (gbps/pps), protection startup delay (seconds), business availability recovery time (ttr), manslaughter rate and real user delay changes. in this actual measurement, the average protection startup delay was 1–5 seconds, and the business recovery time (from traffic abnormality to the response rate returning to the normal threshold) averaged 3–12 seconds, depending on the attack type and the complexity of the protection strategy. these data can help determine whether the so-called "second resolution" is within an acceptable range.

why can american nodes achieve faster "second solution" effect?

the main reasons include network topology and resource provisioning: us nodes usually have abundant upstream bandwidth, mature anycast routing and fast traffic scheduling capabilities; secondly, many service providers have preset automated rule distribution and smart traffic cleaning links in us data centers, which can quickly switch cleaning paths when anomalies are detected. in addition, being close to the attack source or traffic transfer point can also shorten the detection and interception process, thus improving the "second solution" performance. however, regions are not omnipotent, and the precision of strategies and rules determines the final effect.

how to test the defense capability of the us instant high-defense server to make it more reliable?

reliable testing should include controlled self-built attack generators and real traffic playback. recommended steps: 1) use controllable attack scripts to gradually increase qps/gbps in low-risk time windows and record time series data; 2) monitor the cpu, memory, connection table and network interface status of the target server at the same time; 3) do ab comparison (with/without high-defense enabled) to quantify the availability difference; 4) make false positive judgments to verify the degree of impact on normal user access. testing tools should be able to simulate multi-source ip and protocol mixed attacks, and pay attention to comply with laws and service provider testing policies.

where to deploy us high-defense nodes to better resist short-term burst attacks?

prioritize locations close to the target user group and upstream backbone links: if business users are concentrated in north america, choosing backbone nodes such as los angeles, silicon valley, dallas, or new york can reduce backhaul delays and speed up cleaning efficiency. for cross-border business, it is recommended to deploy at least one anycast cleaning node in the east and west united states for quick distribution. in addition, direct connections to hosting operators (such as large cloud vendors or tier-1 isps) can improve bandwidth flexibility and resistance to amplification attacks.

how to optimize high-defense servers to improve resistance to short-term burst attacks?

combining multi-layer protection strategies can significantly improve the second resolution rate: using bgp absorption and traffic cleaning at the network layer, using rate limiting and syn cookies at the transport/session layer, and deploying waf and behavioral analysis at the application layer to deal with complex request-based attacks. it is further recommended to enable automated rule rollback and grayscale strategies to reduce accidental killings; use real-time monitoring and alarms (thresholds + anomaly detection) to shorten manual intervention time; conduct regular stress drills and update black and white lists and fingerprint databases. finally, it is also critical to evaluate whether the supplier supports on-demand elastic bandwidth and fast whiteboarding (fast delivery strategy).