Recently to help customers do migration program, and several domestic high-defense CDN service providers measured all over. To be honest, this year's enterprises choose CDN with the selection of teammates - usually calm and quiet to see the difference, really encountered DDoS flood attacks, pig teammates can directly send your business away. Today is dedicated to talk about Tencent cloud high defense CDN, I will combine the actual test data and experience of stepping on the pit, its real combat power to you.
First throw a storm theory: now on the market 90% "high defense CDN" is essentially a traditional CDN set of firewalls, can really do network + security depth integration of not a few. Tencent cloud this system is the most pleasant surprise to me is to sink the security capabilities to the edge of the node - what does it mean? Ordinary high-defense CDN defense logic is "traffic first to the center to clean and then distribute", while Tencent Cloud in the global 800 + nodes directly built-in WAF and DDoS detection module, the attack traffic in the edge node was extinguished. Tests have found that the response speed of CC attacks against Web applications is more than 3 times faster than traditional programs, and the delay is reduced to 20ms.
Let's talk about a real case: last year, a game customer suffered 800Gbps of mixed attacks, and the CDN of a certain vendor (I won't name it) was directly penetrated. After migrating to the Tencent cloud high defense CDN, I witnessed in the monitoring background to see the attack traffic was disassembled by region: TCP flood traffic was cleaned by the edge nodes nearby, HTTP slow attack was accurately intercepted by the WAF rules, and finally reached the source station of the traffic is less than 0.1%. the most important thing is that the whole process of the business is completely senseless.
But don't think that a high-defense CDN is just a pile of hardware bandwidth. The most ruthless thing about this Tencent Cloud system is the intelligent scheduling algorithm - it even dynamically adjusts the routing policy according to the type of attack. For example, when it encounters a DNS reflection attack, it will automatically enable TCP port convergence; when it encounters an application layer attack, it will trigger a human verification challenge. These policies are generated in real-time by machine learning models. I tried to simulate hybrid attacks with a pressure testing tool written in Go, and the result was that each attack pattern was quickly learned and new rules generated.
The configuration level is actually simpler than expected. Instead of writing a bunch of if judgments in Nginx like traditional solutions, most of the security policies can be handled through a visual interface:
But there are pitfalls: if you need to customize WAF rules in depth, you have to be aware that their rule engine uses a self-developed DSL language, and the initial learning cost is slightly higher. I recommend using the "Rule Simulation Test" function in the console to verify the effect, otherwise you may accidentally kill normal traffic. In addition, although their logging system is powerful, but the original logs need to purchase additional logging services, which is not as good as CDN5 directly provide free logs to download.
In terms of performance, three rounds of pressure testing were done: under the normal flow of 500QPS, the latency of Hangzhou to Singapore node was stable at 83ms, while CDN07 had to run to 110ms+ under the same conditions. When the full protection mode is turned on, the performance loss of Tencent Cloud is about 12%, while the loss of 08Host reaches 22%. Special mention of the video business scenario: Tencent Cloud's optimization of the HLS/DASH protocol is really in place, and the random jump load time is 40% faster than that of other families, which is attributed to their intelligent pre-pull algorithm.
Price honestly: Tencent cloud high defense CDN is definitely not cheap. The basic protection package starts at 3,000 per month, and if it encounters a large-scale attack, it will also trigger flexible billing. But think of it from another angle - compared to the loss of business interruption caused by the attack, this investment is actually very cost-effective. They recently launched the "guaranteed bandwidth + flexible peak" billing model is very practical, I handled an e-commerce project last year to save 37% cost.
Finally, the applicable scene: if you are doing financial, gaming, e-commerce and such high-risk business, Tencent Cloud high defense CDN is definitely the first choice. Especially the overseas business, their dedicated interconnection with AWS/AliCloud quality is very stable. But if it is a static official website, blogs and such low-frequency business, the basic protection of CDN5 is enough, and there is no need to pay for advanced features that can not be used.
To summarize, Tencent Cloud high-defense CDN is like a Swiss army knife - not the cheapest, but really life-saving at critical times. Its strength lies in the deep integration of security and transport, especially the intelligent scheduling system and edge security capabilities. But if you're looking for a minimalist configuration or an extremely low price, you may need to look at other options. It is recommended that you must apply for a test package before making a formal purchase, and run it for 7 days with real business traffic, and the "Security Report" function in the monitoring background will make the risk points clear.
To add a cold knowledge: their node servers are equipped with self-developed TencentOS security kernel by default, the system-level protection ability is much stronger than ordinary Linux. This thing usually do not feel the existence of, but encountered kernel-level vulnerability attacks is a lifesaver - last year, a Linux zero-day vulnerability outbreak, we deployed Tencent cloud CDN business completely unaffected.
There is no silver bullet for network security, and a good CDN should be accompanied by a sound operation and maintenance system. Don't forget to regularly check the integrity of the SSL certificate chain, update the WAF rule base, but also to do a good job of the source station stealth - have seen too many people buy a high-defense CDN but because of the source station IP leakage was directly hit through the real - tragedy. Remember: high defense CDN is the first line of defense, not the only line of defense.
