The distributed denial of service (DDoS) attack is detrimental to businesses and individuals as people are heavily relying on the Internet. Due to remarkable profits, crackers favor DDoS as cybersecurity weapons to attack a victim. Even worse, edge servers are more vulnerable. Current solutions lack adequate consideration to the expense of attackers and inter-defender collaborations. Hence, we revisit the DDoS attack and defense, clarifying the advantages and disadvantages of both parties. We further propose a joint defense framework to defeat attackers by incurring a significant increment of required bots and enlarging attack expenses. The quantitative evaluation and experimental assessment showcase that such expense can surge up to thousands of times. The skyrocket of expenses leads to heavy loss to the cracker, which prevents further attacks.

翻译：分散拒绝服务(DDoS)攻击对企业和个人有害,因为人们严重依赖互联网。由于利润巨大,饼干支持DDoS作为网络安全武器攻击受害者。更糟糕的是,边端服务器更加脆弱。目前的解决方案没有充分考虑到攻击者和攻击者之间合作的代价。因此,我们重新审视DDoS攻击和辩护,澄清双方的利弊。我们进一步提议一个联合防御框架,通过大量增加所需的机器人和扩大攻击费用来击败攻击者。定量评估和实验评估表明,这种费用可以猛增数千次。 费用暴涨导致裂缝损失惨重,从而防止进一步攻击。