Internet Assigned Numbers Authority Remote Framebuffer (RFB) Created 2010-12-08 Last Updated 2022-06-07 Available Formats [IMG] XML [IMG] HTML [IMG] Plain text Registries included below * Remote Framebuffer Security Types * Remote Framebuffer Client-to-Server Message Types * Remote Framebuffer Server-to-Client Message Types * Remote Framebuffer Encoding Types Remote Framebuffer Security Types Registration Procedure(s) Expert Review Expert(s) Tristan Richardson Reference [RFC6143] Available Formats [IMG] CSV Value Name Reference 0 Invalid [RFC6143] 1 None [RFC6143] 2 VNC Authentication [RFC6143] 3-15 RealVNC historic assignment 16 Tight historic assignment 17 Ultra historic assignment 18 TLS historic assignment 19 VeNCrypt historic assignment 20 GTK-VNC SASL historic assignment 21 MD5 hash authentication historic assignment 22 Colin Dean xvp historic assignment 23 Secure Tunnel [RFC7869] 24 Integrated SSH [RFC7869] 25-29 Unassigned 30-36 Apple Inc. [Michael_Stein] 37-127 Unassigned 128 RealVNC historic assignment 129 RealVNC historic assignment 129 Tight Unix Login Authentication [Samuel_Mannehed] 130-134 RealVNC historic assignment 135-191 Unassigned 192 RealVNC historic assignment 193-255 Unassigned Remote Framebuffer Client-to-Server Message Types Registration Procedure(s) Expert Review Expert(s) Tristan Richardson Reference [RFC6143] Available Formats [IMG] CSV Value Name Reference 0 SetPixelFormat [RFC6143] 1 Unassigned 2 SetEncodings [RFC6143] 3 FramebufferUpdateRequest [RFC6143] 4 KeyEvent [RFC6143] 5 PointerEvent [RFC6143] 6 ClientCutText [RFC6143] 7-21 Possibly used in UltraVNC historic assignment 22-79 Unassigned 80 Possibly used in UltraVNC historic assignment 81-126 Unassigned 127 VMWare historic assignment 128 Car Connectivity [Jörg_Brakensiek] [Terminal Mode v1.0] 129-149 Unassigned 150 TightVNC EnableContinuousUpdates historic assignment 151-244 Unassigned 245 Replit Audio Client Message [Luis_Héctor_Chávez] 246 Dell-EMC [Rajeshkumar_Patel] 247 Dell-EMC [Rajeshkumar_Patel] 248 ClientFence TigerVNC 249 OLIVE Call Control historic assignment 250 Colin Dean xvp historic assignment 251 Pierre Ossman SetDesktopSize historic assignment 252 tight historic assignment 253 gii historic assignment 254 VMWare historic assignment 255 Anthony Liguori historic assignment Remote Framebuffer Server-to-Client Message Types Registration Procedure(s) Expert Review Expert(s) Tristan Richardson Reference [RFC6143] Available Formats [IMG] CSV Value Name Reference 0 FramebufferUpdate [RFC6143] 1 SetColourMapEntries [RFC6143] 2 Bell [RFC6143] 3 ServerCutText [RFC6143] 4-15 Possibly used in UltraVNC historic assignment 16-126 Unassigned 127 VMWare historic assignment 128 Car Connectivity [Jörg_Brakensiek] [Terminal Mode v1.0] 129-149 Unassigned 150 TightVNC EndOfContinuousUpdates historic assignment 151-172 Unassigned 173 ServerState historic assignment 174-244 Unassigned 245 Replit Audio Server Message [Luis_Héctor_Chávez] 246 Dell-EMC [Rajeshkumar_Patel] 247 Dell-EMC [Rajeshkumar_Patel] 248 ServerFence TigerVNC 249 OLIVE Call Control historic assignment 250 Colin Dean xvp historic assignment 251 Unassigned 252 tight historic assignment 253 gii historic assignment 254 VMWare historic assignment 255 Anthony Liguori historic assignment Remote Framebuffer Encoding Types Registration Procedure(s) Expert Review Expert(s) Tristan Richardson, John Levine Reference [RFC6143] Available Formats [IMG] CSV Value Name Reference 0 Raw [RFC6143] 1 CopyRect [RFC6143] 2 RRE [RFC6143] 5 Hextile [RFC6143] 9-10 Possibly used in UltraVNC historic assignment 16 ZRLE [RFC6143] -239 Cursor pseudo-encoding [RFC6143] -223 DesktopSize pseudo-encoding [RFC6143] 4 CoRRE historic assignment 6 zlib historic assignment 7 tight historic assignment 8 zlibhex historic assignment 15 TRLE [RFC6143] 17 Hitachi ZYWRLE historic assignment 20 H.264 [Tristan_Richardson] 21 JPEG historic assignment [Tristan_Richardson] 22 JRLE historic assignment [Tristan_Richardson] 23 VA H.264 [Tristan_Richardson] 24 ZRLE2 [Tristan_Richardson] 50 Open H.264 Encoding [https://github.com/rfbproto/rfbproto/blob/master/rfbproto.rst][Maxim_Devaev] 1000-1002 Apple Inc. [Michael_Stein] 1011 Apple Inc. [Michael_Stein] 1024 to 1099 RealVNC historic assignment [Tristan_Richardson] 1100-1109 Apple Inc. [Michael_Stein] -1 to -222 tight options historic assignment -224 to -238 tight options historic assignment -240 to -256 tight options historic assignment -257 to -272 Anthony Liguori historic assignment -273 to -304 VMWare historic assignment -305 gii historic assignment -306 popa historic assignment -307 Peter Astrand DesktopName historic assignment -308 Pierre Ossman ExtendedDesktopSize historic assignment -309 Colin Dean xvp historic assignment -310 OLIVE Call Control historic assignment -311 ClientRedirect [Brian_Hinz] -312 Fence TigerVNC -313 ContinuousUpdates TigerVNC -314 CursorWithAlpha [Tristan_Richardson] -315 ColorMap [Tristan_Richardson] -412 to -512 TurboVNC fine-grained quality level historic assignment -523 to -528 Car Connectivity [Jörg_Brakensiek] [Terminal Mode v1.0] -763 to -768 TurboVNC subsampling level historic assignment 0x48323634 VA H.264 [David_Verbeiren] 0x52706C41 Replit Audio Pseudo-encoding [Luis_Héctor_Chávez] 0x574d5600 to 0x574d56ff VMWare historic assignment 0xc0a1e5ce to 0xc0a1e5cf Possibly used in UltraVNC historic assignment 0xfffe0000 to 0xfffe00ff Used in LibVNCServer LibVNCServer 0xffff0000 to 0xffff8003 Possibly used in UltraVNC historic assignment Contact Information ID Name Contact URI Last Updated [Brian_Hinz] Brian Hinz mailto:bphinz&users.sourceforge.net 2011-06-09 [David_Verbeiren] David Verbeiren mailto:david.verbeiren&intel.com 2013-02-08 [Jörg_Brakensiek] Jörg Brakensiek mailto:jorg.brakensiek&nokia.com 2011-05-11 [Luis_Héctor_Chávez] Luis Héctor Chávez mailto:luis&repl.it 2021-03-31 [Maxim_Devaev] Maxim Devaev mailto:mdevaev&gmail.com 2021-02-10 [Michael_Stein] Michael Stein mailto:mvs&apple.com 2022-06-07 [Rajeshkumar_Patel] Rajeshkumar Patel mailto:rajesh_z_patel&Dell.com 2020-07-28 [Samuel_Mannehed] Samuel Mannehed mailto:samuel&cendio.se 2019-11-07 [Tristan_Richardson] Tristan Richardson mailto:standards&realvnc.com 2017-09-12 Licensing Terms