When should you ask your ISP to implement filtering in a DoS containment strategy?

Requesting your ISP to implement filtering in a DoS containment strategy is most effective after determining the method of attack. Understanding the specific nature of the Distributed Denial of Service (DDoS) or Denial of Service (DoS) attack allows for targeted filtering measures. Each attack type may require different strategies for mitigation, and knowing the attack method helps in configuring the right filters to effectively block malicious traffic while allowing legitimate traffic to flow.

Implementing filtering too early, without a clear understanding of the attack method, may lead to misconfigurations that could disrupt normal business operations or fail to adequately mitigate the attack. Therefore, ensuring that you have accurately identified how the attack is executed equips you to work with your ISP to put in place the most appropriate filtering measures to protect your network.