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Copy file name to clipboardExpand all lines: _articles/extended-usage/dynamsoft-service-configuration.md
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@@ -14,15 +14,15 @@ description: Dynamic Web TWAIN SDK Documentation Dynamic Web TWAIN Service Page
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The Dynamic Web TWAIN Service is the core piece of Dynamic Web TWAIN when running in Service mode. It handles the communication between hardware (scanner, webcam, etc.) and browser, manages the image buffer, and coordinates data between different modules.
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###IP and ports
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## IP and ports
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The Dynamic Web TWAIN Service uses `localhost` and `18622``18625` ports for HTTP connection and `18623``18626` ports for HTTPS connection.
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These ports can be configured in the `DSConfiguration.ini` file located in:
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- Windows: `C:\Program Files (x86)\Dynamsoft\Dynamic Web TWAIN Service {versionnumber}`(version 18.5.1 and earlier `C:\Windows\SysWOW64\Dynamsoft\DynamsoftServicex64_{versionnumber}`)
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- macOS: `Go > Applications > Dynamsoft > Dynamic Web TWAIN Service {versionnumber}`(version 18.5.1 and earlier `Go > Applications > Dynamsoft > DynamsoftServicex64_{versionnumber} > {installed version No.}`)
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- Linux: `/opt/dynamsoft/Dynamic Web TWAIN Service {versionnumber}`(version 18.5.1 and earlier `/opt/dynamsoft/DynamsoftService`)
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###Access-Control-Allow-Origin
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## Access-Control-Allow-Origin
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For security purposes, you may want the Dynamic Web TWAIN Service to only respond to requests from specified origins. Starting from Dynamic Web TWAIN version 18.5, this can be achieved by adding `Access-Control-Allow-Origin` in the `DSConfiguration.ini` file.
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###Msg: Dynamic Web TWAIN Service is not installed / Dynamic Web TWAIN is not installed
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## Msg: Dynamic Web TWAIN Service is not installed / Dynamic Web TWAIN is not installed
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If Dynamic Web TWAIN Service is not installed, users may receive the error 'The Dynamic Web TWAIN module is not installed' when accessing an application that uses Dynamic Web TWAIN.
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## Msg: Dynamic Web TWAIN Service installed on your device is outdated
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If the service is installed but you are using a new version of the JavaScript library, you may encounter this message. You need to install a new version of the service or downgrade the JavaScript library.
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## Related Resources:
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*[What does Dynamic Web TWAIN Service do?](/_articles/faq/what-does-dynamsoft-service-do-on-end-user-machine.md){:target="_blank"}
Copy file name to clipboardExpand all lines: _articles/faq/add-annotation-to-image.md
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## Can I add annotation to an image (e.g. add watermark or text)?
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This feature has been deprecated since v16.1. Dynamsoft will release an Annotation addon for the Dynamic Web TWAIN SDK and adding text overlay to an image will be supported by the Annotation addon once available. If you are interested, you can send an email to <ahref="mailto:support@dynamsoft.com">support@dynamsoft.com</a> to receive an update on release news.
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In 2023, Dynamsoft introduced Dynamsoft Document Viewer, a feature-rich web-based document viewer that supports document annotation. When used in conjunction with Dynamic Web TWAIN, it enables users to annotate scanned documents seamlessly. For more information, please refer to: [Dynamic Web TWAIN with Annotations](https://www.dynamsoft.com/web-twain/docs/faq/dwt-with-annotation.html).
Copy file name to clipboardExpand all lines: _articles/faq/service-backward-compatibility.md
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4. Copy the .dll files from your temporary location into the _new_ Dynamic Web TWAIN Service folder (from v19.0+, the target path is `C:\Program Files (x86)\Dynamsoft\Dynamic Web TWAIN Service {version number}`).
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