Chapter 4
Configuring Advanced Functions 23
About TCP and UDP Port Numbers
Digi device servers use the TCP and UDP port numbering
conventions described in the following table:
You must ensure that the application or device that initiates
communication with the device server uses these ports. If
they cannot be configured to use these port, you can change
what is known as the “base socket” on the device server,
which allows you to use different port numbers to designate a
Telnet or raw connection to the serial port. See "Changing the
Base Socket: Procedure" on page 23 for more information.
Changing the Base Socket: Procedure
1. Access the configuration by opening a web browser and
entering the device server’s IP address in the URL win-
dow.
2. Sign on to the device server as the root user (root). The
default root password is dbps.
3. From the main menu, choose Configure > Network.
4. Use the base socket field to change the base socket.
Specify a multiple of 100 between 2000 and 9000. Telnet
connections will use the base socket value plus one. Raw
connections will use the base socket value plus one-hun-
dred one. The following table illustrates how this works:
For this connection type... Use this Port
Telnet to the serial port 2001 (TCP only)
Raw connection to the serial port 2101(TCP and UDP)
If the base socket
is...
Then Telnet
uses...
Then Raw uses
...
3000 3001 3101
4500 4501 4601
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