UPDD TCP IP port utilisation

UPDD utilizes tcp/ip for inter-process communication. The user mode driver component (tbupddwu) listens on port 4141 and other programs (including custom programs utilizing the updd api) communicate with this port. The driver requires access to TCP IP port 4141 for internal computer processing only.

With UPDD version pre 4.1.10 and depending on your system configuration, particularly firewall settings, you may be asked to accept incoming connections when you install the driver. It may also be desirable to disable logging of this port to avoid recurring firewall messages.

However, starting with version 4.1.10 this port can be bound either to the local loopback address only, or all addresses. In most cases the default option (local loopback) is used and there should be no firewall issues. In a rare case that a firewall program reports an issue in this configuration if can be safely accepted as only local processes can open this port.

When specialist updd i/p features are to be used (to provide distributed touch facilities) then all addresses are bound, allowing the port to be opened from any network node with the appropriate access and this access should be managed using firewall rules. Binding to all addresses is enabled by setting the updd option:

[updd\parameters]

globalport=1

if not specified this option default to 0 (off)