UltraVNC
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None Authentication doesn't follow 3.8 protocol
When auth is None and version is 3.8, it should have the SecurityResult message:
https://vncdotool.readthedocs.io/en/0.8.0/rfbproto.html#none
This is based on UltraVNC 1.3.8.1. Also tested on an old version at first.
Please be aware, both the UltraVNC client and server don't handle this correctly.
@WalterYongtaoWang: Have you tested more recent builds? Currently, the last one is UltraVNC 1.4.2.0.
When security type is None it seems latest UltraVNC Viewer 1.4.2.0 handles the (extra) SecurityResult packet for version 3.8 of the protocol just fine so this issue is probably already resolved.
Didn't test server impl though.
I was testing the UltraVNC client and connecting to the VMWare WebConsole, which is using None Authentication via WebSocekt. Right now, I don't have a VMWare pod for testing (I also need a proxy to convert the websocket to normal TCP Socket).
Just tried the VNC server 1.4.2, set the AuthRequired as 0, but I couldn't make it work.
On Thu, Apr 27, 2023 at 3:05 AM Vladimir Vissoultchev < @.***> wrote:
When security type is None it seems latest UltraVNC Viewer 1.4.2.0 handles the (extra) SecurityResult packet for version 3.8 of the protocol just fine so this issue is probably already resolved.
Didn't test server impl though.
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Just tried the VNC server 1.4.2, set the AuthRequired as 0, but I couldn't make it work.
What client do you use to connect to your UltraVNC server 1.4.2.0?
Sorry, I made a mistake. The UltraVNC new version (both client and server) actually is working fine with None Auth:
I was using our own VNC client: https://www.remotespark.com/view/vnc.html
The old versions of UltraVNC client can not connect to 1.4.2, but Tiger VNC client does work with Ultras 1.4.2 server.
On Sun, Apr 30, 2023 at 6:38 AM Vladimir Vissoultchev < @.***> wrote:
Just tried the VNC server 1.4.2, set the AuthRequired as 0, but I couldn't make it work.
What client do you use to connect to your UltraVNC server 1.4.2.0?
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You could probably open a new issue about incompatibility of Tiger VNC client w/ UltraVNC server 1.4.2.0 or leave this one open now that there is more info for @RudiDeVos to investigate further.
TigerVNC client does work with Ultra 1..4.2 (RFB 3.8 with None Auth), but it didn't work with old versions of Ultra because of this bug.
On Sun, Apr 30, 2023 at 2:39 PM Vladimir Vissoultchev < @.***> wrote:
You could probably open a new issue about incompatibility of Tiger VNC client w/ UltraVNC server 1.4.2.0 or leave this one open now that there is more info for @RudiDeVos https://github.com/RudiDeVos to investigate further.
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@RudiDeVos: I think it is possible to close this ticket? It works perfectly with 1.4.2.0.