Why this page exists

We haven’t released any support tools that include the components below yet. We’re publishing this page in advance, so customers and anyone else can see our open-source licensing position before they need to ask. We’ll update it the moment that changes.

Some of the software in RED EPOS’s remote support tools was written by other people and shared with everyone under open-source licences. Those licences give you rights over that software, and some of them require us to tell you what we use, which licence applies, and where to get the source code. This page does that.

Nothing on this page, and nothing in any licence it describes, takes away the rights that licence gives you, and nothing in our terms of business restricts them either.

Our remote support tools

When we connect to your systems remotely, or you use a one-time support session, the software doing the connecting includes two open-source components:

Our site build of UltraVNC. Our Windows installer and our one-time support window both run our site build, which is RED EPOS’s own modified version of UltraVNC. It shows your screen to us and lets us use your keyboard and mouse during a session, exactly as our remote access terms describe. We change it for our service: we take out the parts our service doesn’t use, add our branding and settings, and make security changes, such as making sure it only ever connects out to our own server and always requires a password. Our site build is licensed under the GNU General Public License, version 3 or later (GPL-3.0-or-later), like UltraVNC itself, and that includes our changes. We mark every change we make in its source code, with the date we made it. David Lyons, trading as RED EPOS, owns the copyright in those changes.

Based on UltraVNC. Our site build is based on UltraVNC, which is written by the UltraVNC team and other contributors, and we’re grateful for their work. The UltraVNC team doesn’t make, support or endorse our site build, so please bring any question about it to us. We don’t use the UltraVNC name or logo as RED EPOS branding.

Our link software. The connection between your systems and ours is encrypted by software we wrote ourselves, called RedEpos.Link. David Lyons, trading as RED EPOS, owns it, and it isn’t open-source itself. Like our other Windows software, it’s built on Microsoft’s .NET runtime, plus a small number of Microsoft NuGet packages, all under the permissive MIT licence. We list them under “Getting the source code” below, from the first version we ship.

droidVNC-NG (Android). If you use our Android support option, it works through droidVNC-NG, an app you install yourself from Google Play. droidVNC-NG is licensed under the GNU General Public License, version 2 (GPL-2.0). We don’t distribute this app — you get it directly from Google Play, under its developers’ own terms — so nothing about it comes to you from us, and there’s nothing of ours to provide source for. Its own developers publish its source code; see the table below.

This website

This website is also built with open-source software, in line with normal practice for building modern websites: frameworks, libraries and development tools written by many different people and organisations under a range of open-source licences. We don’t list every one of those individually on this page, because the list changes every time we update the site. If you need details of a specific component for a particular reason, contact us and we’ll do our best to help.

Licensed components we ship

Component	Version	Licence	Source
Our site build of UltraVNC	Each version we ship is listed under “Getting the source code” below	GPL-3.0-or-later	Our changed source: see below. The original project: github.com/ultravnc/UltraVNC
droidVNC-NG	Installed by you from Google Play; not distributed by us	GPL-2.0	github.com/bk138/droidVNC-NG, its developers’ own copy

We update this table whenever we release a new version of our support tools, or add a new open-source component to them.

Getting the source code

We haven’t shipped our site build yet. When we do, we’ll list every version we ship here, each with a link to its complete source code, no later than the day we first make that version available.

For droidVNC-NG, its developers publish the source code (linked in the table above). We don’t distribute it, so we don’t provide its source ourselves.

Our written offer. If the source link for any version of our site build, or of any other component we distribute to you under the GNU General Public License, is ever unavailable, or you’d simply rather have a copy directly from us, write to us at support@redepos.co.uk or 8 Barington Drive, Runcorn, Cheshire, WA7 6HH. We’ll send anyone who asks the complete corresponding source code for that version: as a download link, at no charge, or, if you prefer, on a durable physical medium, for a charge no more than our reasonable cost of physically producing and posting it. This offer is open at any time until at least 3 years after we last shipped that version of our software, and it’s open to you whether or not you’re a RED EPOS customer, as the GNU General Public License requires.

Questions

Questions about this page: support@redepos.co.uk, 07885 671481.

Open-source notices