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SSVNC Viewer (based on TightVNC viewer version 1.3.9) Usage: ssvncviewer [<OPTIONS>] [<HOST>][:<DISPLAY#>] ssvncviewer [<OPTIONS>] [<HOST>][::<PORT#>] ssvncviewer [<OPTIONS>] exec=[CMD ARGS...] ssvncviewer [<OPTIONS>] fd=n ssvncviewer [<OPTIONS>] /path/to/unix/socket ssvncviewer [<OPTIONS>] unix=/path/to/unix/socket ssvncviewer [<OPTIONS>] -listen [<DISPLAY#>] ssvncviewer -help <OPTIONS> are standard Xt options, or: -via <GATEWAY> -shared (set by default) -noshared -viewonly -fullscreen -noraiseonbeep -passwd <PASSWD-FILENAME> (standard VNC authentication) -user <USERNAME> (Unix login authentication) -encodings <ENCODING-LIST> (e.g. "tight,copyrect") -bgr233 -owncmap -truecolour -depth <DEPTH> -compresslevel <COMPRESS-VALUE> (0..9: 0-fast, 9-best) -quality <JPEG-QUALITY-VALUE> (0..9: 0-low, 9-high) -nojpeg -nocursorshape -x11cursor -autopass Option names may be abbreviated, e.g. -bgr instead of -bgr233. See the manual page for more information. Enhanced TightVNC viewer (SSVNC) options: URL http://www.karlrunge.com/x11vnc/ssvnc.html Note: ZRLE and ZYWRLE encodings are now supported. Note: F9 is shortcut to Toggle FullScreen mode. Note: In -listen mode set the env var. SSVNC_MULTIPLE_LISTEN=1 to allow more than one incoming VNC server at a time. This is the same as -multilisten described below. Set SSVNC_MULTIPLE_LISTEN=MAX:n to allow no more than "n" simultaneous reverse connections. Note: If the host:port is specified as "exec=command args..." then instead of making a TCP/IP socket connection to the remote VNC server, "command args..." is executed and the viewer is attached to its stdio. This enables tunnelling established via an external command, e.g. an stunnel(8) that does not involve a listening socket. This mode does not work for -listen reverse connections. To not have the exec= pid killed at exit, set SSVNC_NO_KILL_EXEC_CMD=1. If the host:port is specified as "fd=n" then it is assumed n is an already opened file descriptor to the socket. (i.e the parent did fork+exec) If the host:port contains a '/' and exists in the file system it is interpreted as a unix-domain socket (AF_LOCAL/AF_UNIX instead of AF_INET) Prefix with unix= to force interpretation as a unix-domain socket. -multilisten As in -listen (reverse connection listening) except allow more than one incoming VNC server to be connected at a time. The default for -listen of only one at a time tries to play it safe by not allowing anyone on the network to put (many) desktops on your screen over a long window of time. Use -multilisten for no limit. -acceptpopup In -listen (reverse connection listening) mode when a reverse VNC connection comes in show a popup asking whether to Accept or Reject the connection. The IP address of the connecting host is shown. Same as setting the env. var. SSVNC_ACCEPT_POPUP=1. -acceptpopupsc As in -acceptpopup except assume UltraVNC Single Click (SC) server. Retrieve User and ComputerName info from UltraVNC Server and display in the Popup. -use64 In -bgr233 mode, use 64 colors instead of 256. -bgr222 Same as -use64. -use8 In -bgr233 mode, use 8 colors instead of 256. -bgr111 Same as -use8. -16bpp If the vnc viewer X display is depth 24 at 32bpp request a 16bpp format from the VNC server to cut network traffic by up to 2X, then tranlate the pixels to 32bpp locally. -bgr565 Same as -16bpp. -grey Use a grey scale for the 16- and 8-bpp modes. -alpha Use alphablending transparency for local cursors requires: x11vnc server, both client and server must be 32bpp and same endianness. -scale str Scale the desktop locally. The string "str" can a floating point ratio, e.g. "0.9", or a fraction, e.g. "3/4", or WxH, e.g. 1280x1024. Use "fit" to fit in the current screen size. Use "auto" to fit in the window size. "str" can also be set by the env. var. SSVNC_SCALE. If you observe mouse trail painting errors, enable X11 Cursor mode (either via Popup or -x11cursor.) Note that scaling is done in software and so can be slow and requires more memory. Some speedup Tips: ZRLE is faster than Tight in this mode. When scaling is first detected, the encoding will be automatically switched to ZRLE. Use the Popup menu if you want to go back to Tight. Set SSVNC_PRESERVE_ENCODING=1 to disable this. Use a solid background on the remote side. (e.g. manually or via x11vnc -solid ...) If the remote server is x11vnc, try client side caching: x11vnc -ncache 10 ... -ycrop n Only show the top n rows of the framebuffer. For use with x11vnc -ncache client caching option to help "hide" the pixel cache region. Use a negative value (e.g. -1) for autodetection. Autodetection will always take place if the remote fb height is more than 2 times the width. -sbwidth n Scrollbar width for x11vnc -ncache mode (-ycrop), default is very narrow: 2 pixels, it is narrow to avoid distraction in -ycrop mode. -nobell Disable bell. -rawlocal Prefer raw encoding for localhost, default is no, i.e. assumes you have a SSH tunnel instead. -notty Try to avoid using the terminal for interactive responses: use windows for messages and prompting instead. Messages will also be printed to terminal. -sendclipboard Send the X CLIPBOARD selection (i.e. Ctrl+C, Ctrl+V) instead of the X PRIMARY selection (mouse select and middle button paste.) -sendalways Whenever the mouse enters the VNC viewer main window, send the selection to the VNC server even if it has not changed. This is like the Xt resource translation SelectionToVNC(always) -recvtext str When cut text is received from the VNC server, ssvncviewer will set both the X PRIMARY and the X CLIPBOARD local selections. To control which is set, specify 'str' as 'primary', 'clipboard', or 'both' (the default.) -graball Grab the entire X server when in fullscreen mode, needed by some old window managers like fvwm2. -popupfix Warp the popup back to the pointer position, needed by some old window managers like fvwm2. -sendclipboard Send the X CLIPBOARD selection (i.e. Ctrl+C, Ctrl+V) instead of the X PRIMARY selection (mouse select and middle button paste.) -sendalways Whenever the mouse enters the VNC viewer main window, send the selection to the VNC server even if it has not changed. This is like the Xt resource translation SelectionToVNC(always) -recvtext str When cut text is received from the VNC server, ssvncviewer will set both the X PRIMARY and the X CLIPBOARD local selections. To control which is set, specify 'str' as 'primary', 'clipboard', or 'both' (the default.) -graball Grab the entire X server when in fullscreen mode, needed by some old window managers like fvwm2. -popupfix Warp the popup back to the pointer position, needed by some old window managers like fvwm2. -grabkbd Grab the X keyboard when in fullscreen mode, needed by some window managers. Same as -grabkeyboard. -grabkbd is the default, use -nograbkbd to disable. -bs, -nobs Whether or not to use X server Backingstore for the main viewer window. The default is to not, mainly because most Linux, etc, systems X servers disable *all* Backingstore by default. To re-enable it put Option "Backingstore" in the Device section of /etc/X11/xorg.conf. In -bs mode with no X server backingstore, whenever an area of the screen is re-exposed it must go out to the VNC server to retrieve the pixels. This is too slow. In -nobs mode, memory is allocated by the viewer to provide its own backing of the main viewer window. This actually makes some activities faster (changes in large regions) but can appear to "flash" too much. -noshm Disable use of MIT shared memory extension (not recommended) -termchat Do the UltraVNC chat in the terminal vncviewer is in instead of in an independent window. -unixpw str Useful for logging into x11vnc in -unixpw mode. "str" is a string that allows many ways to enter the Unix Username and Unix Password. These characters: username, newline, password, newline are sent to the VNC server after any VNC authentication has taken place. Under x11vnc they are used for the -unixpw login. Other VNC servers could do something similar. You can also indicate "str" via the environment variable SSVNC_UNIXPW. Note that the Escape key is actually sent first to tell x11vnc to not echo the Unix Username back to the VNC viewer. Set SSVNC_UNIXPW_NOESC=1 to override this. If str is ".", then you are prompted at the command line for the username and password in the normal way. If str is "-" the stdin is read via getpass(3) for username@password. Otherwise if str is a file, it is opened and the first line read is taken as the Unix username and the 2nd as the password. If str prefixed by "rm:" the file is removed after reading. Otherwise, if str has a "@" character, it is taken as username@password. Otherwise, the program exits with an error. Got all that? -repeater str This is for use with UltraVNC repeater proxy described here: http://www.uvnc.com/addons/repeater.html. The "str" is the ID string to be sent to the repeater. E.g. ID:1234 It can also be the hostname and port or display of the VNC server, e.g. 12.34.56.78:0 or snoopy.com:1. Note that when using -repeater, the host:dpy on the cmdline is the repeater server, NOT the VNC server. The repeater will connect you. Example: vncviewer ... -repeater ID:3333 repeat.host:5900 Example: vncviewer ... -repeater vhost:0 repeat.host:5900 Use, e.g., '-repeater SCIII=ID:3210' if the repeater is a Single Click III (SSL) repeater (repeater_SSL.exe) and you are passing the SSL part of the connection through stunnel, socat, etc. This way the magic UltraVNC string 'testB' needed to work with the repeater is sent to it. -rfbversion str Set the advertised RFB version. E.g.: -rfbversion 3.6 For some servers, e.g. UltraVNC this needs to be done. -ultradsm UltraVNC has symmetric private key encryption DSM plugins: http://www.uvnc.com/features/encryption.html. It is assumed you are using a unix program (e.g. our ultravnc_dsm_helper) to encrypt and decrypt the UltraVNC DSM stream. IN ADDITION TO THAT supply -ultradsm to tell THIS viewer to modify the RFB data sent so as to work with the UltraVNC Server. For some reason, each RFB msg type must be sent twice under DSM. -mslogon user Use Windows MS Logon to an UltraVNC server. Supply the username or "1" to be prompted. The default is to autodetect the UltraVNC MS Logon server and prompt for the username and password. IMPORTANT NOTE: The UltraVNC MS-Logon Diffie-Hellman exchange is very weak and can be brute forced to recover your username and password in a few seconds of CPU time. To be safe, be sure to use an additional encrypted tunnel (e.g. SSL or SSH) for the entire VNC session. -chatonly Try to be a client that only does UltraVNC text chat. This mode is used by x11vnc to present a chat window on the physical X11 console (i.e. chat with the person at the display). -env VAR=VALUE To save writing a shell script to set environment variables, specify as many as you need on the command line. For example, -env SSVNC_MULTIPLE_LISTEN=MAX:5 -env EDITOR=vi -noipv6 Disable all IPv6 sockets. Same as VNCVIEWER_NO_IPV6=1. -noipv4 Disable all IPv4 sockets. Same as VNCVIEWER_NO_IPV4=1. -printres Print out the Ssvnc X resources (appdefaults) and then exit You can save them to a file and customize them (e.g. the keybindings and Popup menu) Then point to the file via XENVIRONMENT or XAPPLRESDIR. -pipeline Like TurboVNC, request the next framebuffer update as soon as possible instead of waiting until the end of the current framebuffer update coming in. Helps 'pipeline' the updates. This is currently the default, use -nopipeline to disable. -appshare Enable features for use with x11vnc's -appshare mode where instead of sharing the full desktop only the application's windows are shared. Viewer multilisten mode is used to create the multiple windows: -multilisten is implied. See 'x11vnc -appshare -help' more information on the mode. Features enabled in the viewer under -appshare are: Minimum extra text in the title, auto -ycrop is disabled, x11vnc -remote_prefix X11VNC_APPSHARE_CMD: message channel, x11vnc initial window position hints. See also Escape Keys below for additional key and mouse bindings. -escape str This sets the 'Escape Keys' modifier sequence and enables escape keys mode. When the modifier keys escape sequence is held down, the next keystroke is interpreted locally to perform a special action instead of being sent to the remote VNC server. Use '-escape default' for the default modifier sequence. (Unix: Alt_L,Super_L and MacOSX: Control_L,Meta_L) Here are the 'Escape Keys: Help+Set' instructions from the Popup Menu: Escape Keys: Enter a comma separated list of modifier keys to be the 'escape sequence'. When these keys are held down, the next keystroke is interpreted locally to invoke a special action instead of being sent to the remote VNC server. In other words, a set of 'Hot Keys'. To enable or disable this, click on 'Escape Keys: Toggle' in the Popup. Here is the list of hot-key mappings to special actions: r: refresh desktop b: toggle bell c: toggle full-color f: file transfer x: x11cursor z: toggle Tight/ZRLE l: full screen g: graball e: escape keys dialog s: scale dialog +: scale up (=) -: scale down (_) t: text chat a: alphablend cursor V: toggle viewonly Q: quit viewer 1 2 3 4 5 6: UltraVNC scale 1/n Arrow keys: pan the viewport about 10% for each keypress. PageUp / PageDown: pan the viewport by a screenful vertically. Home / End: pan the viewport by a screenful horizontally. KeyPad Arrow keys: pan the viewport by 1 pixel for each keypress. Dragging the Mouse with Button1 pressed also pans the viewport. Clicking Mouse Button3 brings up the Popup Menu. The above mappings are *always* active in ViewOnly mode, unless you set the Escape Keys value to 'never'. If the Escape Keys value below is set to 'default' then a default list of of modifier keys is used. For Unix it is: Alt_L,Super_L and for MacOSX it is Control_L,Meta_L. Note: the Super_L key usually has a Windows(TM) Flag on it. Also note the _L and _R mean the key is on the LEFT or RIGHT side of the keyboard. On Unix the default is Alt and Windows keys on Left side of keyboard. On MacOSX the default is Control and Command keys on Left side of keyboard. Example: Press and hold the Alt and Windows keys on the LEFT side of the keyboard and then press 'c' to toggle the full-color state. Or press 't' to toggle the ultravnc Text Chat window, etc. To use something besides the default, supply a comma separated list (or a single one) from: Shift_L Shift_R Control_L Control_R Alt_L Alt_R Meta_L Meta_R Super_L Super_R Hyper_L Hyper_R or Mode_switch. New Popup actions: ViewOnly: ~ -viewonly Disable Bell: ~ -nobell Cursor Shape: ~ -nocursorshape X11 Cursor: ~ -x11cursor Cursor Alphablend: ~ -alpha Toggle Tight/Hextile: ~ -encodings hextile... Toggle Tight/ZRLE: ~ -encodings zrle... Toggle ZRLE/ZYWRLE: ~ -encodings zywrle... Quality Level ~ -quality (both Tight and ZYWRLE) Compress Level ~ -compresslevel Disable JPEG: ~ -nojpeg (Tight) Pipeline Updates ~ -pipeline Full Color as many colors as local screen allows. Grey scale (16 & 8-bpp) ~ -grey, for low colors 16/8bpp modes only. 16 bit color (BGR565) ~ -16bpp / -bgr565 8 bit color (BGR233) ~ -bgr233 256 colors ~ -bgr233 default # of colors. 64 colors ~ -bgr222 / -use64 8 colors ~ -bgr111 / -use8 Scale Viewer ~ -scale Escape Keys: Toggle ~ -escape Escape Keys: Help+Set ~ -escape Set Y Crop (y-max) ~ -ycrop Set Scrollbar Width ~ -sbwidth XGrabServer ~ -graball UltraVNC Extensions: Set 1/n Server Scale Ultravnc ext. Scale desktop by 1/n. Text Chat Ultravnc ext. Do Text Chat. File Transfer Ultravnc ext. File xfer via Java helper. Single Window Ultravnc ext. Grab and view a single window. (select then click on the window you want). Disable Remote Input Ultravnc ext. Try to prevent input and viewing of monitor at physical display. Note: the Ultravnc extensions only apply to servers that support them. x11vnc/libvncserver supports some of them. Send Clipboard not Primary ~ -sendclipboard Send Selection Every time ~ -sendalways