Network misconfigurations

AWS EC2 instance allows public ingress access on MSSQL port 1433


MSSQL server port - 1433 is used by SQL server to listen for requests from SQL server clients. Allowing inbound traffic from all external IP addresses to MSSQL port is vulnerable to DoS, Buffer Overflow, SQL Injection attacks. It is a best practice to block public access, and restrict access from specific IP addresses to port 1433.