KlingNet3 is a new flexible, cloud-compatible, lighting and visual control protocol for the future developed by InMusic Brand’s ArKaos for the entertainment industry.
It takes flexibility, user-friendliness, feedback, and ultimate control to next-gen levels.

Cool technology often comes at a cost, and it’s not always that this cost is justified. For instance, [Rainfay] tells us about how the the ArtNet protocol’s odd design choices are causing incompatibility with certain Ethernet switches. ArtNet is a protocol for lighting control over DMX-512 – simply put, it allows you to blink a whole ton of LEDs, even literally. Unlike DMX-512 which can use different physical mediums, ArtNet uses Ethernet, taking form of the usual kind of network packets – and it does seem to do a great job about that, if it weren’t for this one thing.

For some reason, ArtNet connections are required to use the same destination and source port – unlike the usual network traffic, where the destination port is protocol-dependent and the source port is randomized. This behaviour violates RFCs, and not just in an abstract manner – such behaviour is indicative of certain kinds of attacks, that switches on the smart side are able and are supposed to prevent. As a result, ArtNet traffic actually triggers some protections on switches at the fancier end, specifically, so-called BLAT protection.

In short, if your ArtNet stream is mysteriously not going through and your switch is on the fancier side, [Rainfay] says you might need to disable some security mechanisms. Sadly, as she points out, this problem isn’t even a direct consequence of some inherent property of ArtNet, but merely a consequence of a bizarre design choice.

ArtNet is not conforming to RFCs
https://www.fayebell.name/?p=520

For all the Network Techs out there. I have a Interesting one, on reddit there was a post about a L2 switch killing the port when ArtNet was sent over it. Using my Network experience, I pulled the devices manual, a the Device in question is a GSD-1002M L2/L4 switch. I wrote up how I would configure it. Long story short it was the DOS protection on this switch. I dug in deeper, made this nice RCA for this issue,

The highlighted settings are the items of interest the UDP and TCP BLAT settings.

What is a Blat Attack – These switch result from sending a specially crafted packet to a machine where the source host port is the same as the destination host port. The system attempts to reply to itself, resulting in system lockup.

This attack could be compared to setting up a mic IN FRONT of your Main PA 1″ Away from the speaker. Then Turning it on full blast.

Looking at RFC6056

Recommendations for Transport-Protocol Port Randomization

Looking at RFC1948

Defending Against Sequence Number Attacks from May 1996
In summary “source port == destination port” is a bad practice.

This Bug has been fixed for a long time in the Linux Kernel networking subsystem to avoid this issue

So in closing,

source port == dest port. Is triggering the Blat DOS detection.

Now lets look at the Protocol spec.,

It states that the programmer must use, source port of 6454 to contact the destination listing port 6454 of the server.

That is Not conforming to Multiple RFCs and is using a bad practice.

Work around Disable BLAT protection.

Root Cause ArtNet protocol says to use the same source port(client) as the destination port (server). is causing the issue.

What is it? Lightjams is a software for interactive DMX lighting. It’s all about giving you the power to generate unique effects based on many types of live signals – MIDI, OSC, DMX, music, video, time, etc.

Led Player is also the ideal DMX512 software for all Architectural applications thanks to its ability to write a show in to the stand alone memory of the Chromateq devices and play back sequences without computer.

• User firendly and effective Live Board mode to play and trigger
• Compatibility with 32/64 bit systems (Windows, Mac Os X, Linux)
• Free, downloadable updates
• Can modify the DMX signal speed and allocated DMX universes
• Includes a smart-phone communication to command the live board