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---
layout: page
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permalink: /external/exchange-channels/asperaweb/
shortcut: exchange-channels:asperaweb
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redirect_from:
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  - /cards/exchange-channels:asperaweb
  - /external/cards/exchange-channels:asperaweb
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---
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# AsperaWEB Quick Guide
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{:toc}
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## Overview
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AsperaWEB is an IBM Aspera deployment at the LCSB-University of Luxembourg. AsperaWEB supports end-to-end encrypted data transfer and can handle high data volumes e.g. several tera bytes.z

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> **IMPORTANT NOTE:** Aspera requires UDP ports to be enabled on firewalls.
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Specifically your firewall should:
 * Allow outbound connections from the Aspera client on the TCP port (TCP/33001, by default, when connecting to a Windows server, or on another non-default port for other server operating systems).
 * Allow outbound connections from the Aspera client on the fasp UDP port (33001, by default).
 * If you have a local firewall on your server (like Windows Firewall), verify that it is not blocking your SSH and fasp transfer ports (e.g. TCP/UDP 33001).

Detailed information on how to configure firewalls when working with Aspera is given [here](https://download.asperasoft.com/download/docs/p2p/3.5.1/p2p_admin_win/webhelp/dita/configuring_the_firewall.html).
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## Obtaining a AsperaWEB access link
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You need an **access link** to use AsperaWEB. An access link is a temporary, password-protected space, much like a drop box, on LCSB's AsperaWEB server. In order to obtain an access link, you should contact your research collaborator at the LCSB-University of Luxembourg. Once created, you will receive your **access link** and associated **password** (link) by e-mail.
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> **IMPORTANT NOTE: Whenever the LCSB shares a password for a AsperaWEB endpoint (collaborator), the password is transmitted via a link which will expire. Therefore you should make a record of your password once you view it.**
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An access link can be reached via standard web browsers. Data can be transferred to/from an access link in two ways:

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* Through the web browser by visiting the link, which is our recommended way of data transfer, described in this [section of the guide](#ASPERAWEB_WEB)
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* Through the use of a command line tool. If your data sits in an environment, where you can not launch a web browser, then you may use use a command line client tool to reach an access link. This process is described in this [section of this guide](#ASPERAWEB_CLI).
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The use of AsperaWEB is mediated by LCSB's data stewards. If you require assistance in using AsperaWEB, you should send an email to the [LCSB datastewards](mailto:lcsb-datastewards@uni.lu).
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<a name="ASPERAWEB_WEB"></a>
## Accessing AsperaWEB via Web Interface
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In the following steps we provide instructions on how to use AsperaWEB web interface.
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1. Once you receive your **access link** and **password** from the LCSB, visit the link using a standard web browser. Firefox 66.x (or higher) recommended, but others should also work. You will be prompted for your password (see below).<br/>
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 ![Alt](img/asperaweb_1.png "Title")
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2. When you visit a AsperaWEB access link for the very first time, you will be prompted to install or update **IBM Aspera Connect** client.
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	* click **Download** or **Download the App** buttons (see below). <br/>![Alt](img/asperaweb_2.png "Title")
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	* wait for the download to finish, the prompt should go to step 3. <br/>![Alt](img/asperaweb_3.png "Title")
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	* open the installer just downloaded and start the installer. <br/>![Alt](img/asperaweb_4.png "Title")
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	* close the installer, the Aspera Connect should try to open - *depending on your Operating System you may be asked if you are sure to open it* -
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	* the prompt should disappear
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	* restart your browser
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3. The **access link** page will display a **File Browser** section. Depending on the settings per access link, users can create or delete folders in the File Browser and upload and/or download data.<br/>
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  ![Alt](img/asperaweb_6.png "Title")
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4. Clicking **Upload** or **Download** will launch the **IBM Aspera Connect** client on your computer. You first will be asked whether you allow the client to connect to aspera.lcsb.uni.lu. Choose **Allow**.
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5. At any time you can launch **IBM Aspera Connect** to display the status of uploads to or downloads from your computer. <br/>
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  ![Alt](img/asperaweb_8.png "Title")
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6. All data are encrypted on server side and they stay encrypted also upon download. For decryption, you have to navigate into your **IBM Aspera Connect** window and click "**Unlock encrypted files**". <br/>
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  ![Alt](img/asperaweb_9.png "Title") <br/>
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You will be prompted for encryption passphrase which is present on the file browser. <br/>
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  ![Alt](img/asperaweb_10.png "Title") <br/>
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Encrypted files are by default kept on your disc after decryption. If you want to change this behaviour, navigate to Options->Settings and check "Delete encrypted files when finished" box.
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7. You can also navigate to the help section on the top right of the browser. It contains information and links to get support.
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<a name="ASPERAWEB_CLI"></a>
## Accessing AsperaWEB via Command-Line Tool
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Go to the help section of your access link
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<br/> ![Alt](img/asperaweb_help_link.png "Title") <br/><br/><br/>
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And follow the steps in the **Using the command line** section.
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<br/> ![Alt](img/asperaweb_cli_tokens.png "Title") <br/><br/><br/>