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Resize vnc server

resize vnc server

My VNC version is Tigervnc server. Configure Remote Desktop to resize resolution to connecting client window? Ask Question Asked 7 years ago. After command "vncserver -geometry x",the display on VNC viewer is still x,which is default resolution of the server ariurana.xyz As the VNC server built into QEMU cannot be aware of higher-level operations like window movement, resizing, or scrolling, those operations will tend to be. ANYDESK LOGO Вы можете прийти к нам.

Connect and share knowledge within a single location that is structured and easy to search. I would like to be able to resize a VNC session, where the Ubuntu I would like to try the suggestion here however I need to know where the vnc4server is started in the Ubuntu Where is this started up, and is it safe to make changes to that start-up script, or is it better left alone to avoid breaking other stuff?

Since default desktop sharing in ubuntu is facilitated by vino-server, you should likely disable or remove this first, then install your vnc4server. Ubuntu Community Ask! Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams?

Learn more. Asked 9 years, 2 months ago. Modified 8 years, 3 months ago. Viewed 2k times. Many thanks. Improve this question. Community Bot 1. Stevod Stevod 1 2 2 bronze badges. Add a comment. If you are okay with having a desktop that can only be accessed via VNC, one of these is likely your best choice.

Both optimize window movement and depending on the application scrolling, giving a very responsive user experience. This is because images transmitted to Guacamole are always encoded losslessly as PNG images. The main benefit of using x11vnc is that it allows you to continue using your desktop normally, while simultaneously exposing control of your desktop via VNC. If you need to use your desktop locally as well as via VNC, you will likely be quite happy with x11vnc.

If you need to share your local desktop, we recommend using x11vnc rather vino, as it has proven more performant and feature-complete in our testing. If you need to see the virtual monitor of your virtual machine, using this VNC connection is really your only choice. As the VNC server built into QEMU cannot be aware of higher-level operations like window movement, resizing, or scrolling, those operations will tend to be sent suboptimally, and will not be as fast as a VNC server running within the virtual machine.

If you wish to use a virtual machine for desktop access, we recommend installing a native VNC server inside the virtual machine after the virtual machine is set up. This will give a more responsive desktop. RDP support for Guacamole is provided by the libguac-client-rdp library, which will be installed as part of guacamole-server if the required dependencies are present during the build.

RDP connections require a hostname or IP address defining the destination machine. The RDP port is defined to be , and will be this value in most cases. You only need to specify the RDP port if you are not using port The port the RDP server is listening on. RDP provides authentication through the use of a username, password, and optional domain.

All RDP connections are encrypted. Most RDP servers will provide a graphical login if the username, password, and domain parameters are omitted. One notable exception to this is Network Level Authentication, or NLA, which performs all authentication outside of a desktop session, and thus in the absence of a graphical interface. Servers that require NLA can be handled by Guacamole in one of two ways. The first is to provide the username and password within the connection configuration, either via static values or by passing through the Guacamole credentials with parameter tokens and LDAP authentication.

Alternatively, if credentials are not configured within the connection configuration, Guacamole will attempt to prompt the user for the credentials interactively, if the versions of both guacd and Guacamole Client in use support it. If either component does not support prompting and the credentials are not configured, NLA-based connections will fail.

The security mode to use for the RDP connection. This mode dictates how data will be encrypted and what type of authentication will be performed, if any. By default, a security mode is selected based on a negotiation process which determines what both the client and the server support.

Automatically select the security mode based on the security protocols supported by both the client and the server. This is the default. This mode uses TLS encryption and requires the username and password to be given in advance. Unlike RDP mode, the authentication step is performed before the remote desktop session actually starts, avoiding the need for the Windows server to allocate significant resources for users that may not be authorized.

If the versions of guacd and Guacamole Client in use support prompting and the username, password, and domain are not specified, the user will be interactively prompted to enter credentials to complete NLA and continue the connection. Otherwise, when prompting is not supported and credentials are not provided, NLA connections will fail.

Extended Network Level Authentication. Legacy RDP encryption. This mode is generally only used for older Windows servers or in cases where a standard Windows login screen is desired. Newer versions of Windows have this mode disabled by default and will only accept NLA unless explicitly configured otherwise. Note that this refers to authentication that takes place while connecting. Any authentication enforced by the server over the remote desktop session such as a login dialog will still take place.

By default, authentication is enabled and only used when requested by the server. Windows uses a different sequence of characters at the end of each line compared to other operating systems. As RDP preserves the format of line endings within the clipboard, this can cause trouble when using a non-Windows machine to access Windows or vice versa. If clipboard normalization is used, Guacamole will automatically translate the line endings within clipboard data to compensate for the expectations of the remote system.

The type of line ending normalization to apply to text within the clipboard, if any. By default, line ending normalization is not applied. Preserve all line endings within the clipboard exactly as they are, performing no normalization whatsoever. Automatically transform all line endings within the clipboard to Unix-style line endings LF. This format of line ending is the format used by both Linux and Mac. RDP sessions will typically involve the full desktop environment of a normal user.

Although Guacamole is independent of keyboard layout, RDP is not. By default, the US English qwerty keyboard will be used. If this does not match the keyboard layout of your RDP server, keys will not be properly translated, and you will need to explicitly choose a different layout in your connection settings.

If your keyboard layout is not supported, please notify the Guacamole team by opening an issue in JIRA. When connecting to the RDP server, Guacamole will normally provide its own hostname as the name of the client. If this parameter is specified, Guacamole will use its value instead. The server-side keyboard layout. This is the layout of the RDP server and has nothing to do with the keyboard layout in use on the client.

The Guacamole client is independent of keyboard layout. The RDP protocol, however, is not independent of keyboard layout, and Guacamole needs to know the keyboard layout of the server in order to send the proper keys when a user is typing.

The timezone that the client should send to the server for configuring the local time display of that server. This will be converted by RDP into the correct format for Windows. The timezone is detected and will be passed to the server during the handshake phase of the connection, and may used by protocols, like RDP, that support it. This parameter can be used to override the value detected and passed during the handshake, or can be used in situations where guacd does not support passing the timezone parameter during the handshake phase guacd versions prior to 1.

Support for forwarding the client timezone varies by RDP server implementation. Windows Server installations in admin mode, along with Windows workstation versions, do not allow the timezone to be forwarded. Other server implementations, for example, xrdp, may not implement this feature at all. Consult the documentation for the RDP server to determine whether or not this feature is supported.

Guacamole will automatically choose an appropriate display size for RDP connections based on the size of the browser window and the DPI of the device. The size of the display can be forced by specifying explicit width or height values. To reduce bandwidth usage, you may also request that the server reduce its color depth. Color depth is otherwise dictated by the RDP server. If specified, this must be either 8, 16, or The width of the display to request, in pixels.

If this value is not specified, the width of the connecting client display will be used instead. The height of the display to request, in pixels. If this value is not specified, the height of the connecting client display will be used instead. The desired effective resolution of the client display, in DPI. If this value is not specified, the resolution and size of the client display will be used together to determine, heuristically, an appropriate resolution for the RDP session.

The method to use to update the RDP server when the width or height of the client display changes. If this value is not specified, no action will be taken when the client display changes size. Normally, the display size of an RDP session is constant and can only be changed when initially connecting. As of RDP 8. For older RDP servers, the only option is to disconnect and reconnect with the new size.

Automatically disconnects the RDP session when the client display size has changed, and reconnects with the new size. Device redirection refers to the use of non-display devices over RDP. Audio redirection will be enabled by default. If Guacamole was correctly installed, and audio redirection is supported by your RDP server, sound should play within remote connections without manual intervention.

Printing requires GhostScript to be installed on the Guacamole server, and allows users to print arbitrary documents directly to PDF. When documents are printed to the redirected printer, the user will receive a PDF of that document within their web browser. Guacamole provides support for file transfer over RDP by emulating a virtual disk drive.

This drive will persist on the Guacamole server, confined within the drive path specified. If drive redirection is enabled on a Guacamole RDP connection, users will be able to upload and download files as described in Using Guacamole. Audio is enabled by default in both the client and in libguac-client-rdp. By default, audio input support within RDP is disabled. By default, direct RDP support for multi-touch events is disabled. Enabling support for multi-touch allows touch interaction with applications inside the RDP session, however the touch gestures available will depend on the level of touch support of those applications and the OS.

If multi-touch support is not enabled, pointer-type interaction with applications inside the RDP session will be limited to mouse or emulated mouse events. Printing is disabled by default, but with printing enabled, RDP users can print to a virtual printer that sends a PDF containing the document printed to the Guacamole client. Printing support requires GhostScript to be installed.

If guacd cannot find the gs executable when printing, the print attempt will fail. The name of the redirected printer device that is passed through to the RDP session. This is the name that the user will see in, for example, the Devices and Printers control panel. File transfer is disabled by default, but with file transfer enabled, RDP users can transfer files to and from a virtual drive which persists on the Guacamole server.

If set to true downloads from the remote server to client browser will be disabled. The default is false, which means that downloads will be allowed. If set to true, uploads from the client browser to the remote server location will be disabled.

The default is false, which means uploads will be allowed if file transfer is enabled. The name of the filesystem used when passed through to the RDP session. The directory on the Guacamole server in which transferred files should be stored. This directory must be accessible by guacd and both readable and writable by the user that runs guacd. This parameter does not refer to a directory on the RDP server.

Only the final directory in the path will be created - if other directories earlier in the path do not exist, automatic creation will fail, and an error will be logged. By default, the directory specified by the drive-path parameter will not automatically be created, and attempts to transfer files to a non-existent directory will be logged as errors.

A comma-separated list of static channel names to open and expose as pipes. If you wish to communicate between an application running on the remote desktop and JavaScript, this is the best way to do it. Guacamole will open an outbound pipe with the name of the static channel. If JavaScript needs to communicate back in the other direction, it should respond by opening another pipe with the same name.

Guacamole allows any number of static channels to be opened, but protocol restrictions of RDP limit the size of each channel name to 7 characters. If you are using Hyper-V, you will need to specify the ID of the destination virtual machine within the preconnection-blob parameter. This value can be determined using PowerShell:. The preconnection PDU is intentionally generic. While its primary use is as a means for selecting virtual machines behind Hyper-V, other RDP servers may use it as well.

In most cases, you will need to do the following when connecting to Hyper-V:. Hyper-V may use a self-signed certificate. This is a non-negative integer value dictating which of potentially several logical RDP connections should be used. This parameter is optional, and is only required if the RDP server is documented as requiring it. If using Hyper-V, this should be left blank.

This parameter is optional, and is only required if the RDP server is documented as requiring it, such as Hyper-V. For Hyper-V, this will be the ID of the destination virtual machine. If you will be using Guacamole to connect through such a gateway, you will need to provide additional parameters describing the connection to that gateway, as well as any required credentials.

The hostname of the remote desktop gateway that should be used as an intermediary for the remote desktop connection. If omitted, a gateway will not be used. The port of the remote desktop gateway that should be used as an intermediary for the remote desktop connection. The username of the user authenticating with the remote desktop gateway, if a gateway is being used.

This is not necessarily the same as the user actually using the remote desktop connection. The password to provide when authenticating with the remote desktop gateway, if a gateway is being used. The domain of the user authenticating with the remote desktop gateway, if a gateway is being used. This is not necessarily the same domain as the user actually using the remote desktop connection.

RDP does not dictate the format of this information; it is specific to the balancer in use. If you are using a load balancer and are unsure whether such information is required, you will need to check the documentation for your balancer. If your balancer provides. The load balancing information or cookie which should be provided to the connection broker.

If no connection broker is being used, this should be left blank. RDP provides several flags which control the availability of features that decrease performance and increase bandwidth for the sake of aesthetics, such as wallpaper, window theming, menu effects, and smooth fonts. These features are all disabled by default within Guacamole such that bandwidth usage is minimized, but you can manually re-enable them on a per-connection basis if desired. By default, wallpaper will be disabled, such that unnecessary bandwidth need not be spent redrawing the desktop.

By default, theming within RDP sessions is disabled. Text over RDP is rendered with rough edges by default, as this reduces the number of colors used by text, and thus reduces the bandwidth required for the connection. By default, the RDP server will only draw the window border while windows are being dragged.

By default, such effects, if available, are disabled. Menu animations are disabled by default. This parameter allows that to be controlled in a Guacamole session. RDP normally maintains caches of regions of the screen that are currently not visible in the client in order to accelerate retrieval of those regions when they come into view. This is usually only useful when dealing with known bugs in RDP server implementations and should remain enabled in most circumstances.

Glyph caching is currently universally disabled, regardless of the value of this parameter, as glyph caching support is not considered stable by FreeRDP as of the FreeRDP 2. Recent versions of Windows provide a feature called RemoteApp which allows individual applications to be used over RDP, without providing access to the full desktop environment. If your RDP server has this feature enabled and configured, you can configure Guacamole connections to use those individual applications.

Specifies the RemoteApp to start on the remote desktop. If supported by your remote desktop server, this application, and only this application, will be visible to the user. Windows requires a special notation for the names of remote applications. The names of remote applications must be prefixed with two vertical bars. For example, if you have created a remote application on your server for notepad. The working directory, if any, for the remote application.

This parameter has no effect if RemoteApp is not in use. The command-line arguments, if any, for the remote application. The connection will use RDP to connect to localhost at port Other options are available for controlling the color depth, size of the screen, etc. SSH support for Guacamole is provided by the libguac-client-ssh library, which will be installed as part of guacamole-server if the required dependencies are present during the build. Text session recording typescripts. Providing terminal input directly from JavaScript.

Controlling terminal behavior. Terminal display settings. By default, Guacamole does not do any verification of host identity before establishing SSH connections. The potential exists for Man-in-the-Middle MitM attacks when connecting to these hosts.

Guacamole includes two methods for verifying SSH and SFTP server identity that can be used to make sure that the host you are connecting to is a host that you know and trust. If the file is not present, no verification is done. If the file is present, it is read in at connection time and remote host identities are verified against the keys present in the file.

The second method for verifying host identity is by passing a connection parameter that contains an OpenSSH known hosts entry for that specific host. If these parameters are not present on their respective connections no host identity verification is performed. If the parameter is present then the identity of the remote host is verified against the identity provided in the parameter before a connection is established.

SSH connections require a hostname or IP address defining the destination machine. SSH is standardized to use port 22 and this will be the proper value in most cases. You only need to specify the SSH port if you are not using the standard port. The port the SSH server is listening on, usually If this is not specified, the default of 22 will be used.

The known hosts entry for the SSH server. This parameter is optional, and, if not provided, no verification of host identity will be done. If the parameter is provided the identity of the server will be checked against the data. By default the SSH client does not send keepalive requests to the server.

This parameter allows you to configure the the interval in seconds at which the client connection sends keepalive packets to the server. The default is 0, which disables sending the packets. The minimum value is 2. Generally for this authentication method you need only provide a username. For Guacamole to use public key authentication, it must have access to your private key and, if applicable, its passphrase.

If the private key requires a passphrase, but no passphrase is provided, you will be prompted for the passphrase upon connecting. If no private key is provided, Guacamole will attempt to authenticate using a password, reading that password from the connection parameters, if provided, or by prompting the user directly. The username to use to authenticate, if any. If not specified, you will be prompted for the username upon connecting.

The password to use when attempting authentication, if any. If not specified, you will be prompted for your password upon connecting. The entire contents of the private key to use for public key authentication. If this parameter is not specified, public key authentication will not be used. The passphrase to use to decrypt the private key for use in public key authentication.

This parameter is not needed if the private key does not require a passphrase. If the private key requires a passphrase, but this parameter is not provided, the user will be prompted for the passphrase upon connecting. By default, SSH sessions will start an interactive shell. If you wish to override this and instead run a specific command, you can do so by specifying that command in the configuration of the Guacamole SSH connection. The command to execute over the SSH session, if any.

The language of the session is normally set by the SSH server. If the SSH server allows the relevant environment variable to be set, the language can be overridden on a per-connection basis. The specific locale to request for the SSH session. This parameter allows you to control the timezone that is sent to the server over the SSH connection, which will change the way local time is displayed on the server.

The available values of this parameter are standard IANA key zone format timezones, and the value will be sent directly to the server in this format. Whether file transfer should be enabled. Guacamole includes the guacctl utility which controls file downloads and uploads when run on the SSH server by the user over the SSH connection.

If omitted, the root directory will be used by default. If set to true downloads from the remote system to the client browser will be disabled. The default is false, which means that downloads will be enabled. If set to true uploads from the client browser to the remote system will be disabled. The default is false, which means that uploads will be enabled.

The connection will use SSH to connect to localhost at port Other options are available for controlling the font. Telnet is a text protocol and provides similar functionality to SSH. By nature, it is not encrypted, and does not provide support for file transfer. Telnet support for Guacamole is provided by the libguac-client-telnet library, which will be installed as part of guacamole-server if the required dependencies are present during the build. Telnet connections require a hostname or IP address defining the destination machine.

Telnet is standardized to use port 23 and this will be the proper value in most cases. You only need to specify the telnet port if you are not using the standard port. The port the telnet server is listening on, usually If this is not specified, the default of 23 will be used. Telnet does not actually provide any standard means of authentication. Authentication over telnet depends entirely on the login process running on the server and is interactive.

To cope with this, Guacamole provides non-standard mechanisms for automatically passing the username and entering password. Whether these mechanisms work depends on specific login process used by your telnet server. This is the mechanism used by most telnet clients, typically via the -l command-line option. Passwords cannot typically be sent automatically - at least not as reliably as the username.

There is no PASSWORD environment variable this would actually be a horrible idea nor any similar mechanism for passing the password to the telnet login process, and most telnet clients provide no built-in support for automatically entering the password.

The best that can be done is to heuristically detect the password prompt, and type the password on behalf of the user when the prompt appears. The prescribed method for doing this with a traditional command-line telnet is to use a utility like expect. Guacamole provides similar functionality by searching for the password prompt with a regular expression. If Guacamole receives a line of text which matches the regular expression, the password is automatically sent. If no such line is ever received, the password is not sent, and the user must type the password manually.

Pressing any key during this process cancels the heuristic password prompt detection. If the password prompt is not being detected properly, you can try using your own regular expression by specifying it within the password-regex parameter. If not specified, or not supported by the telnet server, the login process on the telnet server will prompt you for your credentials.

Most telnet servers satisfy this criteria. If specified, your password will be typed on your behalf when the password prompt is detected. The regular expression to use when waiting for the username prompt. If not specified, a reasonable default built into Guacamole will be used. The regular expression to use when waiting for the password prompt. The regular expression to use when detecting that the login attempt has succeeded. If specified, the terminal display will not be shown to the user until text matching this regular expression has been received from the telnet server.

The regular expression to use when detecting that the login attempt has failed. If specified, the connection will be closed with an explicit login failure error if text matching this regular expression has been received from the telnet server. The connection will use telnet to connect to localhost at port If Guacamole is set up to use HTTPS then communication with the Guacamole client will be encrypted, but communication between guacd and the telnet server will still be unencrypted.

You should not use telnet unless the network between guacd and the telnet server is trusted. Kubernetes provides an API for attaching to the console of a container over the network. Kubernetes support for Guacamole is provided by the libguac-client-kubernetes library, which will be installed as part of guacamole-server if the required dependencies are present during the build. Attaching to a Kubernetes container requires the hostname or IP address of the Kubernetes server and the name of the pod containing the container in question.

By default, Guacamole will attach to the first container in the pod. If there are multiple containers in the pod, you may wish to also specify the container name. The port the Kubernetes server is listening on for API connections. If omitted, port will be used by default. The name of the Kubernetes namespace of the pod containing the container being attached to.

The name of the container to attach to. If omitted, the first container in the pod will be used. When this parameter is specified, the behavior of the connection is analogous to running kubectl exec. When omitted, the behavior is analogous to running kubectl attach.

If the certificate used by Kubernetes is self-signed or signed by a non-standard certificate authority, the certificate for the certificate authority will also be needed. If omitted, SSL client authentication will not be performed. The certificate of the certificate authority that signed the certificate of the Kubernetes server, in PEM format.

If omitted, verification of the Kubernetes server certificate will use only system-wide certificate authorities. Guacamole provides bidirectional access to the clipboard by default for all supported protocols. This behavior can be overridden on a per-connection basis with the disable-copy and disable-paste parameters. By default, the user will be given access to the copied text.

By default, the user will be able to paste data from outside the browser within the remote desktop session. If omitted, SFTP will be disabled. If omitted, the hostname of the remote desktop server associated with the connection will be used. If omitted, the standard port of 22 will be used. The known hosts entry for the SFTP server.

This parameter is optional, and, if not provided, no verification of SFTP host identity will be done. This parameter is optional if a username is specified for the remote desktop connection. If omitted, the username specified for the remote desktop connection will be used. The directory to upload files to if they are simply dragged and dropped, and thus otherwise lack a specific upload location. If omitted, the default of 0 will be used, disabling sending keepalive packets.

Sessions of all supported protocols can be recorded graphically. These recordings take the form of Guacamole protocol dumps and are recorded automatically to a specified directory. Recordings can be subsequently translated to a normal video stream using the guacenc utility provided with guacamole-server.

For example, to produce a video called NAME. The guacenc utility has additional options for overriding default behavior, including tweaking the output format, which are documented in detail within the manpage:. If recording of key events is explicitly enabled using the recording-include-keys parameter, recordings can also be translated into human-readable interpretations of the keys pressed during the session using the guaclog utility.

The usage of guaclog is analogous to guacenc , and results in the creation of a new text file containing the interpreted events:. Guacamole will never overwrite an existing recording.

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Scaling make things look bad blurry, stretched and the resolutions available through xrandr are generic and they don't exactly fit Reminna's window most of the times. This is a great feature that allows the VNC session to adjust the resolution following the window size. So if you resize the window, the remote session will be adjusted on the fly, no need to reconnect, etc. The results is perfect, no black bars, no scaling.

Same experience as with using RDP against Windows servers. Do you think it would be possible to implement this in Remmina. I think it would be an excellent feature. Open sidebar Remmina Remmina Issues VNC plugin: resize remote session to the local window. Modified 3 years, 7 months ago. Viewed 74k times. I don't have root permission to update the newer vncserver version, so following command doesn't work as of now: vncserver -geometry x -randr x,x For now, whenever I want to change the screen size from one monitor to other, I kill the session and restart it with modified -geometry option.

Improve this question. Community Bot 1. Add a comment. Sorted by: Reset to default. Highest score default Date modified newest first Date created oldest first. Improve this answer. Chad Geary Chad Geary 1 1 bronze badge. Momchil Milev Momchil Milev 11 1 1 bronze badge.

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