As a top priority, make sure enough bandwidth is available to handle not only the surge in legitimate traffic, but also possible small-scale denial-of-service (DoS) attacks. I would also recommend initiating a Web infrastructure vulnerability assessment and a penetration test, including DoS testing, before the new campaign goes live. It should be noted that these attacks can last hours, days or even weeks. Any time you believe you are under a DoS attack, you should contact your ISP representative immediately.
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