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Virtual web application firewalls

Azure cloud provides web application security by adding Web Application Firewall (WAF) to Azure application gateway service. This is a virtual machine appliance from a third party in the Azure marketplace which offers Layer-7 security and can be added to application gateway to perform application layer inspection:

A typical WAF solution protects you against:

SQL injection
XSS (Cross-site scripting)
Common web attacks
HTTP protocol violations and anomalies
Distributed Denial of service (DDoS)
Botnets and Scanners
Common IIS and Apache misconfigurations

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