Spring boot Spring boot REST服务仅允许通过F5负载平衡器进行访问

我在2台ApacheTomcat服务器（2个实例）上运行Spring引导REST服务。此外，我还配置了一个F5负载平衡器，用于在两个tomcat服务器实例之间转发请求

实际值：

https://f5-host/api/example --> working HTTP: 200
https://tomcat-host1/api/example --> working HTTP: 200
https://tomcat-host2/api/example --> working HTTP: 200

https://f5-host/api/example --> working HTTP: 200
https://tomcat-host1/api/example --> Access Denied HTTP: 403
https://tomcat-host2/api/example --> Access Denied HTTP: 403

问题是，我建议在通过tomcat服务器直接访问服务时，执行代码更改以限制访问。我认为这可以通过ApacheTomcat服务器中的配置直接实现。有人能在这里建议最好的方法/配置细节吗

期望值：

https://f5-host/api/example --> working HTTP: 200
https://tomcat-host1/api/example --> working HTTP: 200
https://tomcat-host2/api/example --> working HTTP: 200

https://f5-host/api/example --> working HTTP: 200
https://tomcat-host1/api/example --> Access Denied HTTP: 403
https://tomcat-host2/api/example --> Access Denied HTTP: 403

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哪个Spring Boot版本？Spring Boot 2.1.8版本