Currently UltraVNC determines if the server supports file transfer or text chat based on the reported RFB version or if rfbUltraVNC is the chosen authScheme. This makes it very hard for 3rd party servers to implement these features without loosing interoperability with other clients.
Is there a reason this isn't implemented using a pseudo-encoding like every other optional feature?
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Development: UltraVNC development is always here... Any help is welcome
Feedback is welcome
A new stable version, UltraVNC 1.6.4.0 and UltraVNC SC 1.6.4.0 have been released: https://forum.uvnc.com/viewtopic.php?t=38095
Feedback is always welcome
2025-12-14: 1.7.1.X-dev release builds need tests and feedback: https://forum.uvnc.com/viewtopic.php?t=38134
2025-12-02: We need help: English Wikipedia UltraVNC page has been requested to deletion: https://forum.uvnc.com/viewtopic.php?t=38127
Any help is welcome to improve the UltraVNC page and/or to comment on the Wikipedia Talk page
2025-05-06: Forum password change request: https://forum.uvnc.com/viewtopic.php?t=38078
2023-09-21: Important: Please update to latest version before to create a reply, a topic or an issue: https://forum.uvnc.com/viewtopic.php?t=37864
Development: UltraVNC development is always here... Any help is welcome
Feedback is welcome
Filetransfer and textchat as pseudo-encodings
- Rudi De Vos
- Admin & Developer

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Re: Filetransfer and textchat as pseudo-encodings
It was historical implemented like that without special reason.
Possible it would have better to use pseudo-encodings but hard to change and to stay backward compatible.
Possible it would have better to use pseudo-encodings but hard to change and to stay backward compatible.
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