In this case we are troubleshooting specially Linux to SPLUNK running on port 6514 but the focus is on connectivity so should work for most scenarios. A common issue is firewall blocking flow so I test by running netcat using a command like this from the source Linux server nc -v 10.11.12.13 6514RESULTS: successful: no firewall blocked anything else: firewall blocking or port is not up on destination If the Firewall is not blocking traffic then check to see if you have an establish connection using netstat on the Linux box netstat -an | grep 6514 Another helpful tool in this sceanrio is to check tcpdump to see the traffic being sent to the destination server. I would typcally run something like tcpdump -nni any dst host 10.11.12.13 and dst port 6514

If you don't have docker installed yet and if you are like me are running rhel on a VM here are the instructions Installation StepsRegister Your RHEL System: Use the following command to register your system: subscription-manager registerEnable the Extras Repository: The Docker package is available in the RHEL Extras repository. Enable it with: subscription-manager repos --enable=rhel-7-server-extras-rpmsInstall Docker: Use the package manager to install Docker: yum install dockerStart Docker Service: After installation, start the Docker service: systemctl start dockerEnable Docker to Start on Boot: To ensure Docker starts automatically on system boot, use: systemctl enable dockerPost-InstallationVerify Installation: Check if Docker is installed correctly by running: docker --versionRun a Test Container: You can test your installation by running a simple container: docker run hello-worldBy following these steps, you will have Docker installed and running on your RHEL virtual machine.

To deploy Prometheus and Grafana on Docker, create a docker-compose.yml file that defines both services, mapping the necessary ports (9090 for Prometheus and 3000 for Grafana). Then, run the command docker-compose up -d to start the containers. Setting Up Prometheus and Grafana on DockerTo deploy Prometheus and Grafana using Docker, follow these steps to create a docker-compose.yml file and start the services. PrerequisitesEnsure you have Docker and Docker Compose installed on your machine. Open ports 9090 (for Prometheus) and 3000 (for Grafana) on your host. Create the Docker Compose FileCreate a directory for your project. Inside this directory, create a file named docker-compose.yml with the following content: version: '3' services: prometheus: image: prom/prometheus:latest container_name: prometheus ports: - "9090:9090" volumes: - ./prometheus.yml:/etc/prometheus/prometheus.yml command: - '--config.file=/etc/prometheus/prometheus.yml' grafana: image: grafana/grafana:latest container_name: grafana ports: - "3000:3000" volumes: - grafana-data:/var/lib/grafana volumes: grafana-data:Create the Prometheus Configuration FileIn the same directory, create a file named prometheus.yml with the following content: global: scrape_interval: 15s scrape_configs: - job_name: 'prometheus' static_configs: - targets: ['localhost:9090'] Start the ServicesRun the following command in your terminal to start Prometheus and Grafana: docker-compose up -dAccess the ServicesPrometheus: Open your web browser and go to http://localhost:9090. Grafana: Open your web browser and go to http://localhost:3000. The default login credentials are admin/admin. Verify the SetupCheck that both services are running correctly by navigating to their respective URLs. You should see the Prometheus interface and the Grafana login page.