What’s more frustrating than losing your 4D Remote connection to the 4D Server while switching networks on the go?
Whether you’re moving from Ethernet to Wi-Fi or hopping between hotspots, traditional connections tend to drop, forcing 4D Remote to disconnect and reconnect.
With 4D 21 and the QUIC protocol, those interruptions are a thing of the past.
QUIC is designed to be resilient during network changes, keeping your session alive even when the underlying connection shifts.

Seamless Interface Switching

With 4D 21 and the QUIC network layer, network interface changes are handled automatically and transparently. Whether you’re switching from Ethernet to Wi-Fi or vice versa, 4D Remote stays connected— no manual intervention, no data loss.

Especially Handy for Laptops

Laptops often juggle multiple network interfaces. When both Ethernet and Wi-Fi are available, the system typically prioritizes Ethernet. But if you unplug the cable while moving around, the system switches to Wi-Fi.
Now, with 4D 21, your 4D Remote connection follows suit, without interruption!

Keep Working Without Disruption

Whether you’re transferring local resources, looping through entities, or handling large data sets, 4D Remote maintains its execution context, even during a network switch. You might notice a very brief delay, but that’s it. No disconnection, no reconnection, no lost progress.

Monitor the Switch

On the 4D Server side, the 4D Remote’s IP address updates automatically. You can observe this in:

• The 4D Server Administration window
• The Session.info.IPAddress attribute
• The relevant logs

See It in Action

Here’s a short demo under real-world conditions:

We hope this new feature makes your applications even more robust and user-friendly, especially in mobile environments!