Actual Test Report: Performance Evaluation Of Hong Kong High-defense Cn2 Server In Cross-border Access

1. Report introduction and test purpose

(1) Purpose: To evaluate the real performance of Hong Kong’s high-defense CN2 server under cross-border access (Mainland China, Southeast Asia, North America, and Europe).
(2) Scope: network delay, packet loss rate, bandwidth stability and anti-DDoS capability.
(3) Object: Comparison between Hong Kong physical machines/high-defense VPS with CN2 direct line and ordinary public cloud nodes.
(4) Method: Use ping, traceroute, iperf3 and actual business stress testing (HTTP/HTTPS).
(5) Expectations: Provide reproducible data and deployment suggestions, taking into account domain name resolution and CDN strategies.

2. Test environment and tool description

(1) Test node: Hong Kong high-defense CN2 server (both physical and virtual), the peer is a multi-city node in mainland China and several nodes around the world.
(2) Tools: ping (ICMP), mtr, traceroute, iperf3 (TCP/UDP), wrk (HTTP stress test), tcpdump (packet capture).
(3) Measurement period: June 2026, covering peak/off-peak hours during working hours, and continuous measurement for 72 hours to obtain the average and peak values.
(4) Bandwidth setting: The default 10Gbps uplink speed limit of the test port can simulate different bandwidth levels (100Mbps/500Mbps/1Gbps).
(5) DDoS test: simulate SYN flooding/UDP amplification and high-traffic HTTP GET attacks within the scope of protection compliance to evaluate the cleaning effect.

3. Server configuration example (real case 1)

(1) Model: Hong Kong physical high-defense server (computer room: Hong Kong Central backbone) and connected to CN2 direct connection.
(2) Configuration: CPU 8 cores (Intel Xeon E-2288G), memory 32GB, NVMe 1TB, system disk RAID1.
(3) Bandwidth and ports: 10Gbps dedicated line port, monthly bandwidth 500Mbps (can burst to 10Gbps).
(4) Protection capabilities: The peak value of high-defense cleaning is claimed to be 200Gbps / 1,000,000 PPS; the black hole strategy can be automatically switched according to the business whitelist.
(5) BGP and routing: Multi-line BGP, including CN2-GIA and Hong Kong local direct connection priority, supporting static routing and Anycast.

4. Measured delay and packet loss data display

(1) Note: The following is a comparison of the measured average value (ms) and packet loss rate (%), measured within the same period.
(2) Test point selection: Guangzhou, Beijing, Singapore, Los Angeles, and Frankfurt.
(3) The table is shown as follows (unit: delay ms / packet loss %):

Test point	Average delay (ms)	Packet loss rate (%)	Bandwidth throughput (Mbps)
Guangzhou (CN)	12	0.2	480
Beijing (CN)	25	0.5	420
Singapore (SG)	18	0.3	460
Los Angeles (US)	160	1.2	320
Frankfurt (DE)	210	1.5	280

(4) Interpretation: The average delay for mainland China is less than 30ms, with very little packet loss. The delay across the Pacific and Europe is increased due to the influence of submarine links.
(5) Conclusion: CN2 direct connection performs well in the direction of mainland China, but transoceanic links are still affected by physical distance and intermediate routes.

5. DDoS protection measurement and cleaning effect (real case 2)

(1) Case background: An e-commerce company A (pseudonym) encountered a SYN/UDP amplified hybrid attack with a peak peak of approximately 150Gbps.
(2) Deployment plan: Point domain name A to the Hong Kong high-defense CN2 server + upstream cleaning node, and use the CDN back-to-origin strategy.
(3) Results: Traffic is directed to the cleaning pool within 3 seconds after the policy is triggered, business port packet loss remains <1%, and user request timeout rate drops to 0.8%.
(4) Data: During attack and defense, the normal bandwidth back to the source remains about 350Mbps, and the cleaning node suppresses illegal traffic by about 99%.
(5) Recommendation: Cooperate with WAF rules and domain name (DNS) to quickly switch to avoid exposing the origin IP through direct connection back to the origin.

6. CDN and domain name resolution optimization suggestions

(1) Suggestion 1: Use Anycast DNS with nearby access to reduce DNS resolution delay and support fast switching back to the source.
(2) Recommendation 2: Divert application scenarios, send static resources to the global CDN, and send dynamic requests to Hong Kong CN2 to ensure low latency.
(3) Recommendation 3: Set the domain name TTL to 60-300 seconds to facilitate quick adjustment of the resolution strategy when DDoS occurs.
(4) Recommendation 4: Combine HTTP/2 or QUIC to accelerate cross-border connections and reduce handshake time.
(5) Recommendation 5: Conduct route testing regularly, preferably CN2-GIA or direct backbone to ensure a stable path to mainland China.

7. Conclusion and deployment reference points

(1) Conclusion: Hong Kong’s high-defense CN2 server has low latency and high stability in cross-border access to mainland China, and its anti-DDoS capabilities are available in real attacks.
(2) Limitations: The latency and bandwidth across the ocean to the United States and Europe are limited by physical links and need to be optimized with CDN and edge nodes.
(3) Deployment suggestions: Choose a service with 200Gbps+ cleaning capabilities, and preset WAF and traffic threshold alarms.
(4) Operation and maintenance points: monitor RTT/packet loss, set up DNS emergency lines, and regularly evaluate BGP routing changes.
(5) Final tip: Evaluate the cleaning strategy within the scope of compliance and legality, and customize and optimize it based on business characteristics (games/e-commerce/API).