The chess industry has been hit by DDoS in the past few years. Last year to help a Texas platform to do emergency response, just connect the phone to hear the boss yell over there: “bandwidth is full, players all card dropped, every hour loss of hundreds of thousands!” Go over and take a look, good guy, the peak rushed to 400Gbps, the traditional high defense simply can not carry.
This scale of attack is not an individual hacker can come up with, all professional team manipulation of botnets, picking the peak hours of business to play a series of combinations - TCP flood, CC attacks, DNS amplification attacks round to round. You think you can buy an ordinary high defense IP can be fixed? It's naive. Many vendors claim that “T-level defense”, the actual check found that the entire server room bandwidth added up to the calculation, a single point of cleaning ability to shrink seriously.
A truly reliable chess high defense CDN has to solve three major pain points at the same time:Ultra-large-scale traffic absorption capability, accurate malicious traffic identification, and zero-perception service switching. Below I break down how to realize it with real-world testing experience.
First of all, traffic absorption. Chess attacks can easily be a few hundred G, and the entrance bandwidth of an ordinary server room is only a few dozen G, so once you hit it, you will wear it. It is necessary to use a distributed architecture to disperse the traffic to multiple cleaning centers. Like CDN5's global nodes can carry 800Gbps single-point cleaning, the overall defense value is said to be 3T + - this figure look at the good, the key to look at the proportion of near-source cleaning. I tested his Hong Kong node, 480Gbps mixed attack pressure up, the delay only jumped 20ms.
But bandwidth alone is not enough, many attacks under the guise of “legitimate business”. Last week a platform was HTTPS CC attack, each request with a valid SSL certificate, the traditional rules can not stop. This time we have to rely on intelligent cleaning engine:
This combination of punches down, 90% CC attacks can be marked within 3 seconds. The key is the js_challenge mechanism - normal user browsers will automatically perform calculations to return the token, the bot program directly stuck. Never trust those programs that only use CAPTCHA, the player experience is so poor that they directly uninstall the app.
Node scheduling is the real deal. 08Host's global scheduling system impressed me: once an attack is detected, DNS will direct malicious traffic to the cleaning node within 15 seconds, and normal users will take the accelerated line. The key is to keep the TCP connection, players will not drop. Their engineers showed me the real-time scheduling logs:
Now some vendors blow “unlimited defense”, purely foolhardy. There is always an upper limit to the physical hardware, the key to look at the redundancy design. Reliable program like CDN5: each cleaning node set aside 30% redundant bandwidth, multiple routes between core nodes backup. Once a vendor was 600G penetration, is because the routing between the nodes did not do isolation, was hit with a chain reaction.
The chess business also has to be protected against protocol vulnerabilities. Some attacks specifically target game communication protocols - such as spoofing GPS coordinate packets to swipe room matches, or draining the server thread pool with low-speed connections. It is recommended to add protocol checking modules at the CDN level:
Finally, the cost. Purely rely on cloud cleaning is too much money, recommend a hybrid architecture: daily traffic go CDN07 acceleration, the attack switched to 08Host dedicated high defense nodes. After a customer deployed this way, the monthly cost from 70,000 down to 23,000, 300G below the attack is completely senseless.
These days, even CDNs have to “prevent teammates”. Some vendors will resell the traffic to a third party in order to save costs, not to mention that the cleaning effect is discounted, there is a risk of data leakage. Be sure to write in the contract “independent node deployment + data not out of the country”, before going online, it is best to do a penetration test - I have seen too many shell products.
In short, chess high defense CDN is not simply buying bandwidth, but spelling technology integration capabilities. From traffic scheduling, protocol analysis to business coupling, each link must be polished. If you really want to choose a model, focus on three points: the real cleaning capacity (to test reports), scheduling accuracy (look at the log), business compatibility (personally pressure test). Don't believe that sales blow the value of their own environment to build a wave of traffic, more than anything else is persuasive.
