User manual

Configuration through the web interface
82
Network services settings
The Network Services page shows a set of common network services that are available for
Digi devices, and the network port on which the service is running.
Common network services can be enabled and disabled, and the TCP port on which the
network service listens can be configured. Disabling services may be done for security
purposes. That is, certain services can be disabled so the device runs only those services
specifically needed. To improve device security, non-secure services such as Telnet can be
disabled.
It is usually best to use the default network port numbers for these services because they
are well known by most applications.
Several services have a setting for whether TCP keep-alives will be sent for the network
services. TCP keep-alives can be configured in more detail on the Advanced Network
Settings page.
Caution Exercise caution in enabling and disabling network services,
particularly disabling them. Changing certain settings can render a
Digi Connect device inaccessible. For example, disabling Advanced
Digi Discovery Protocol (ADDP) prevents the device from being
discovered on a network, even if it is actually connected. Disabling
HTTP and HTTPS disables access to the web interface. Disabling
basic services such as Telnet, Rlogin, etc. can make the Command-
Line interface inaccessible.