LANsurveyor allows you to monitor availability of applications and services on your network through TCP Port Monitoring. Select Window>TCP Port Monitor to view the TCP Port Monitoring window. You can monitor up to 20 different nodes.
Click on the Modify button to select the nodes to monitor in the wizard, then right-click in the appropriate cell to enable monitoring of the node in that row and the port in that column.
Click on the Start button or select Start Monitoring from the Monitor>TCP Port menu to start monitoring.
Click on the Stop button or select Stop Monitoring from the Monitor>TCP Port menu to stop monitoring.
While waiting for the status of the TCP Port, LANsurveyor displays an empty circle 
. If the port responds and the ASCII text received from the port matches the expected result for the TCP server in question, a green dot 
is displayed; if there is no response, a red dot 
is displayed. A warning dot 
is displayed when the TCP port is responding, but the ASCII text received does not match the expected result for the TCP server in question. An alert is triggered when the number of retries set in Options has been reached.
To view the exact ASCII text received by the TCP server being monitored, right-click the warning dot and select Statistics. The Last Script Receipt section of the TCP Port Statistics dialog box contains the last ASCII text received as well as the ASCII text that was expected by LANsurveyor.