With the Port Scanner you can check which ports are opened at a server. Type the name of the server in the combobox and press Start. It will check if the following ports are opened; 7, 21, 23, 25, 53, 70, 79, 80, 109, 110, 119, 135, 143, 194.
You can also indicate if you want to check a range of ports. First select Range of ports and fill in the start and end portnumber.
In the result list you will find the status of the checked ports. If a port is familiar, their will be a description present (like port 21 for FTP).
Remark: Since there are a many problems which can occur during the connection to a socket, this method for checking the services of a host is not failproof.