The "Dynamically executing code is security-sensitive" rule for SQL Server code states that dynamically executing code can be a security risk due to the possibility of malicious code being injected into the system. It is recommended that code be validated and tested before being executed to ensure that it is safe and secure. Additionally, developers should be aware of the potential security risks associated with dynamic execution and take steps to minimize them. This includes using stored procedures, parameterized queries, and input validation to prevent malicious code from being injected into the system.

Using hardcoded IP addresses in SQL Server code is considered to be security-sensitive because it can easily be exploited by malicious actors. This is because hardcoded IP addresses are static and can be easily identified by hackers, which makes them vulnerable to attack. Additionally, hardcoded IP addresses can be used to bypass authentication and authorization checks, allowing malicious actors to access sensitive data or gain unauthorized access to a system. To prevent this, developers should avoid using hardcoded IP addresses in their code and instead use dynamic IP addresses that change regularly. Additionally, developers should always use secure protocols and encryption when communicating with external systems.