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What tools or techniques can I use to protect my ASP.NET web application from Denial Of Service attacks
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Use network security systems, such as firewalls, or consider using DoS protection services that may be available through your service provider. Contact your Internet or cloud service provider as soon as possible. Recover. Check for signs of other malicious activity that may have taken place during the DoS attack.
Web application firewall (WAF) protects web applications and APIs from different attacks like those highlighted in OWASP Top 10 (SQL injections, cross-site scripting (XSS) etc), application layer denial of service (DoS) attacks like amplification attacks or Slowloris, zero day attacks etc.
In both instances, the DoS attack deprives legitimate users (i.e. employees, members, or account holders) of the service or resource they expected. Victims of DoS attacks often target web servers of high-profile organizations such as banking, commerce, and media companies, or government and trade organizations.
Try the Dynamic IP Restriction extension http://www.iis.net/download/dynamiciprestrictions
Not a perfect solution, but helps raise the bar =)
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