The HTTPS Web Client

About the Web Client

Available in Cerberus FTP Server Enterprise edition, the HTTP/S web client capability allows any user with access to a common web browser to easily connect to the server to perform file operations (uploading, downloading, deleting, renaming, creating directories, and zipping and unzipping files and directories) using a desktop or mobile web browser.

You can also grant users the ability to generate a public link to any file, and email that link to someone from directly within the web client.

The web client is a native web application that requires no plug-ins or external tools to use. The web client relies on HTML and Javascript for all of its functionality, and will run on any modern web browser.

Additional Web Client features include:

  • Two Factor Authentication for all users using TOTP-compliant apps like Google Authenticator, as well as native DUO Security support
  • Fully tested against IE 9.0+, Firefox 28+, Chrome 30+, Safari 4.0+, Opera 9.0+, iPhone, and the iPad
  • No file size limitations and can efficiently handle file uploads and downloads of any size
  • Simultaneous file upload, and upload drag and drop support in Firefox, Safari, Chrome, and IE 10+
  • Confirmation dialogs for file deleting, zipping, and unzipping
  • Web-based with no software or plugins to install for end users
  • Allow users to request new accounts through the web
  • Allow users to reset forgotten passwords using email link requests combined with security questions
  • Configurable anti-bot security using reCAPTCHA for logins and account requests.
  • Generate and email a public file link (with optional password protection) from within the web client
  • Custom Theme support using the popular Bootstrap 3 framework
  • Desktop and mobile Browser Optimized

Public File Sharing

Public file sharing allows a user to can take any file and generate a unique, time-limited, public link to that file and share it with anyone. The public link can also be password protected. The administrator has full control over public file sharing. The administrator has to grant explicit sharing privileges to a user’s virtual folder before the user can share files publicly from that folder.

A user can revoke access to the public link at any time through the Shares page of the web client.

Emailing a link to a Public File

In addition to public file sharing, users can also email a link to a public file directly from within the web client. Users just need to click the “Email” button on a file (and have the appropriate folder permissions granted by the administrator for sharing) to open a message dialog for emailing the file.

Cerberus FTP Server will use the first SMTP server configured in the Event Manager’s Targets page as the email server for sending emails.

Adding an HTTP or HTTPS Listener

The Cerberus FTP Server web client can be accessed by adding an HTTP or HTTPS listener to Cerberus FTP Server’s listener list. You can add a new HTTP/S listener from the Interfaces page of the Server Manager.

To add a new HTTP or HTTPS listener:

  • Open the Server Manager
  • Select the Interfaces page
  • Select the Add Listener Button button next to the interface list box to add a new interface. The “Add New Listener” dialog box will appear to ask for the interface details (interface IP, type, and port combination)
  • Select the IP address that you want to listen for connections on
  • Select the interface type (HTTP or HTTPS for web client access)
  • Enter the port you wish to listen on. Cerberus will automatically pre-populate the port with the default port for the type of listener you are adding
  • Press the Add button to add the listener
  • The listener should now be added to the Interfaces list. Press Save to close the Server Manager and save your changes.

Redirecting HTTP connections to HTTPS

To be able to accept and redirect HTTP connections to secure HTTPS connections you will need to add both an HTTP listener, and an HTTPS listener, on the IP address you are interested in using. Once you’ve added the HTTP listener, there is an option on the listener options page to Redirect to HTTPS. Select that option and the HTTP listener will just issue redirect requests for all traffic to the HTTPS version of the page (and to the HTTPS listener you’ve added).

Web Client Customizations

The HTTP/S web client can be customized in several ways. Options for changing the default settings are discussed in the following sections.

Changing the Company Logo and Login Image

You can easily change the company logo displayed on the web client by specifying your own logo file.

Cerberus FTP Server 8 HTTP/S Web Client

Cerberus FTP Server 8.0 HTTP Listener
  1. Go to the Interfaces page of the Server Manager (pictured above)
  2. Select the HTTP/S interface you wish to change (not the default interface)
  3. Press the file selection button across from the Logo Image edit box
  4. Select the image file you wish to use and press Ok. The preferred image size is 230 x 70.

The login image displayed on the login page is also customizable using the same procedure as for the company logo. The preferred login image size is 70 x 70 pixels.

The image format for both logos should be one that is supported by all web browsers. We recommend PNG, GIF, or JPEG.

Changing the Login Welcome Message

If you select the Show Welcome Message option for the HTTP/S listener then the server welcome message is displayed next to the login credentials box when a client logs in on that listener. This message can be customized from the Messages page of the Server Manager.

Custom Web Client Themes

The HTTPS web client comes installed with several themes, but administrators can easily adapt and add their own. The web client was redesigned in version 7.0 to use the popular Bootstrap 3 framework. You can develop your own custom CSS theme file and drop it in:

C:\Program Files\Cerberus LLC\Cerberus FTP Server\webadmin\client\custom

Then, restart the Cerberus FTP Server Windows Service to have it automatically detect and make available the new theme.

A theme file is simply a css file that contains your own custom overrides of the default Bootstrap 3 theme. Any files your CSS file references should be relative to the custom folder. Cerberus will detect the new CSS file during startup and make it available as a theme (the theme name is based on the file name) on the Accounts page of the web client.

Further Web Client Customizations

The HTTP/S web client can be further customized by modifying the underlying template files. However, any changes made to those template files will be overwritten whenever Cerberus FTP Server is upgraded. We are working on ways to allow more permanent and lasting changes to the web client. The relevant template files are in:

C:\Program Files\Cerberus LLC\Cerberus FTP Server\webadmin


C:\Program Files\Cerberus LLC\Cerberus FTP Server\webadmin\client

The client-index.tpl file is probably the best place to start for modifying the overall look of the web client. The template files are cached in memory in Cerberus after the first time they are read, so a restart of the underlying Cerberus FTP Server Windows Service is required before any changes to these files will take effect.

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