Document Number: OSUP1029
Product: Observer 8.x or greater
Date: 10-29-2001
Title: Probe TCP port number usage notes

Probe TCP port number usage notes
Observer, Expert Observer and the Observer Suite Probe’s use two TCP ports (25901 and 25903) to transfer data between the Probe and the Observer Console.

Knowledge of these port numbers may be required for users with a firewall between the Probe and the Observer console. Most firewalls will let an administrator configure which ports will be allowed to pass through the firewall. Configuring the firewall to pass data on ports 25901 and possible 25903 may be the only way to use Observer through the firewall.

Port 25901 is the main port and is used for both Probe command(s) and Probe data transfer.

Port 25903 is used for Probe redirection.