The Application Real-Time Monitoring Service (ARMS) agent must maintain a connection to the ARMS server to run as expected. If the agent cannot reach the server, the root cause depends on your deployment environment:
Alibaba Cloud virtual private cloud (VPC) deployment: Check the security group configurations to ensure the agent can communicate with the ARMS server.
Internet deployment: Check the firewall configurations to ensure the agent can reach ARMS endpoints over the public network.
Troubleshoot connectivity issues
VPC deployment
If your application is deployed in an Alibaba Cloud VPC, verify the security group configurations for the instance where the ARMS agent is installed. Ensure that the security group rules allow outbound traffic from the agent to the ARMS server endpoint.
Internet deployment
If your application connects to ARMS over the Internet, verify the firewall configurations on the host where the ARMS agent is installed. Ensure that firewall rules allow outbound traffic from the agent to the ARMS server endpoint.
Related information
For details about ARMS network requirements, see Application Monitoring network configurations.