Help Center/ Elastic Load Balance/ FAQs/ Backend Servers/ Why Are Backend Servers Frequently Accessed by IP Addresses in 100.125.0.0/16?
Updated on 2025-09-25 GMT+08:00

Why Are Backend Servers Frequently Accessed by IP Addresses in 100.125.0.0/16?

Shared load balancers use IP addresses in 100.125.0.0/16 as source addresses to route traffic to backend servers and to check the health of backend servers, if you have configured a health check.

To ensure that your shared load balancer can provide services properly, ensure that the security groups configured for the backend servers allow traffic from 100.125.0.0/16.