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Question:
Do I really need to have 3 IP addresses for my CDN edge server?
Environment:
OnApp CDN
Answer:
The 3 IP address requirement is a security measure for your CDN edge server. The three IP addresses are used to give each user on the server a unique combination of ips, so that that if there is a DDOS attack, it can be located. The edge server needs multiple IP addresses in order to produce this combination.
Comments
1 comment
The 3 IPs allows us to quickly identity the correct CDN resource that being DDOS. When edge server assigned with multiple IPs, the system will distribute the resources across the IPs.
Edge Server A
cdn.a.com will be assigned to serve from 1.2.3.4
cdn.b.com will be assigned to serve from 3.4.5.6
Edge Server B
cdn.a.com will be assigned to serve from 7.8.9.0
cdn.b.com will be assigned to from 4.3.2.1
So with this unique combination, we can quickly identify the CDN resource under the event of DDOS. We will proceed to suspend the CDN resource if the attack magnitudes impacts the system
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