# TCP endpoint monitoring with Netdata Monitors TCP endpoint availability and response time. Following charts are drawn per host: 1. **Latency** ms - Time required to connect to a TCP port. Displays latency in 0.1 ms resolution. If the connection failed, the value is missing. 2. **Status** boolean - Connection successful - Could not create socket: possible DNS problems - Connection refused: port not listening or blocked - Connection timed out: host or port unreachable ## Configuration Edit the `python.d/portcheck.conf` configuration file using `edit-config` from the Netdata [config directory](/docs/configure/nodes.md), which is typically at `/etc/netdata`. ```bash cd /etc/netdata # Replace this path with your Netdata config directory, if different sudo ./edit-config python.d/portcheck.conf ``` ```yaml server: host: 'dns or ip' # required port: 22 # required timeout: 1 # optional update_every: 1 # optional ``` ### notes - The error chart is intended for alarms, badges or for access via API. - A system/service/firewall might block Netdata's access if a portscan or similar is detected. - Currently, the accuracy of the latency is low and should be used as reference only. --- [](<>)