Recently, I helped a few customers to do penetration testing, and when I came up, I asked, “Have you used a high-defense CDN?” As a result, half of the people back to me: “With ah, but does not seem to feel any difference?” I laughed at that time - brother, you are afraid to buy a fake high defense, right? These days even the CDN have to “defense teammates”, not just set a cache called high defense.
High-defense CDN is essentially in the traditional CDN based on stacked armor, to carry the fight against the beatings still have to run fast. But many people blindly on the high defense, the results of the money spent, the attack came as usual collapse. I found that different industries have different needs for high defense - games to low latency, e-commerce afraid of woolgathering, financial data to protect ...... choose the wrong program? That is to give hackers a year-end bonus.
First of all, pour pots of cold water: high defense CDN is not a panacea.You have to figure out exactly what you need to protect against. ddoS? cc attacks? Data theft? Or simply afraid of downtime? The following I combined with practical experience, pick up a 8 industry how to choose a high defense program, by the way, spit out some of the industry's black words.
Gaming industry: delay is the daddy
Those who do games know that players can spray a screen full of Zuan words if they are stuck for a while. Ordinary high defense CDN may be able to carry 500Gbps DDoS, but the delay soared to more than 200ms? Directly cool. Last year, a secondary game was hit by a wave of 700Gbps mixed attacks, with CDN5 BGP line + TCP acceleration program, the delay is hard to pressure to 30ms or less. The key configuration is here:
Don't believe those vendors who boast “unlimited protection”. Really encountered a large number of UDP Flood, many vendors directly give you an empty route to the matter. You have to look for a CDN07 with intelligent scheduling capabilities - attack traffic is automatically cut to the cleaning center, and normal traffic goes to the accelerated line.
E-commerce industry: anti-scratch party than hacking urgent
Double 11 zero you think it is a fight server? In fact, it is a spell of who can carry the script of the wool party. A cross-border e-commerce company had been brushed away millions of coupons, and then on 08Host's WAF + behavioral analysis program, directly blocked the abnormal IP segment + device fingerprinting. Pay attention to this configuration:
E-commerce caching strategy must also be tawdry - product pages can be cached, inventory and prices must be back to the source. There has been a customer to the dynamic interface is also cached, the results of the user to see the price of all yesterday's ...... spit blood recommended to use edge computing to do real-time verification, although expensive but really can save lives.
Financial industry: security > speed > cost
Banks and securities of this kind, data leakage is worse than downtime. You must choose a CDN with certificate-level encryption, such as support for TLS 1.3 + state secret algorithms. A private equity platform with CDN5 financial programs, even DNS queries are made DNSSEC + HTTPS encryption:
A word of caution: financial users should not be greedy for cheap CDN with shared IP! The risk of cross-site contamination can make your compliance review hang directly. Must be exclusive IP + full-link log audit, expensive but can not save.
Streaming industry: bandwidth costs can drive people to death
4K video does not move a few G, DDoS can not kill you, the bandwidth bill can also be killed. Have to use the program with P2P caching and compression optimization. 08Host's video program measured to save 40% bandwidth - rely on the edge node to do video slicing cache, H.265 transcoding + dynamic bit rate adjustment:
Encountered the most pitiful thing: a vendor's “unlimited bandwidth” actually limits the number of connections to a single node! Suddenly burst of fire when the video loading directly into the PPT. now choose the vendor must look at the number of nodes and load balancing strategy.
The government industry: compliance is the red line
To help a government website to do migration, found that they use the CDN node actually outside the country ...... hurry to change the domestic licensed CDN07. Government system must meet: ① data does not go out of the country ② ICP filing ③ equipartition three logs to stay. The configuration of the audit function should be added:
Spit it out: some vendors blow “global nodes”, but the government project you dare to use offshore nodes? Minute by minute violation of network security laws. We also need to pay attention to disable foreign IP access to prevent scanning, but also to prevent certain unspeakable risks.
Education industry: sudden traffic carries the day
How many online education crashed during the epidemic? An online class platform with CDN5's dynamic acceleration program, the opening day of the school year topped 800,000 requests per second. The secret is: ① static resource preloading ② dynamic API nearby back to the source ③ sub-regional scheduling (education network go CERNET). Configuration highlights:
Blood tears lesson: do not stuff all the resources CDN! Live push streaming have to use a dedicated line, otherwise lag can let the students collectively brush a star. There was a customer PPT transcoding service also hang CDN, the results of the peak conversion queue to two hours after the queue ......
Healthcare industry: privacy protection is a lifeline
Medical data breach? Penalize until you doubt your life. An Internet hospital uses 08Host's medical-specific CDN, all data is encrypted before landing, and even the cache is stored with AES-256 encryption:
Special note: CDN vendors must sign HIPAA or GDPR compliance agreements (depending on the scope of business). Many small factories simply do not dare to sign, something happened to dump the pot faster than anyone else.
IoT industry: device certification at the core
Smart home devices being hijacked? Then your home camera may be broadcasting globally. A smart home company changed its program after being hacked: each device binds a certificate + CDN edge node for two-way TLS authentication:
The pitfall of IoT is the sheer volume of devices - the concurrent connection limit of ordinary CDNs can drop tens of thousands of devices at the same time. Gotta go with a vendor that supports millions of long connections, such as CDN07's IoT-specific nodes.
Summarize some dry points:
Selecting a high-defense CDN is like buying insurance - no accident feel loss, accident is not enough. After so many projects, I summarized three iron laws:
Finally, say a word of offense: high-defense CDN this line of water is too deep, some vendors of the “customized program” in fact is to change a configuration template. Do not believe that the sales blow “exclusive technology”, directly to the test report and customer cases - really good vendors, can not wait to let you inspect the goods on site.
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