Powerlink For Mac

• Powerlink For Mac Download
• Powerlink For Mac Free
• Powerlink Machine (uk) Co. Ltd

Enter to Search. My Profile Logout. CNET News Best Apps. PowerLink for iPhone. PowerLink for iPhone. Free Baccus Global LLC iOS Version 1.0.1 Full Specs. POWERLINK (V1/V2) managing or controlled node: Type: Type 4: Variant: 2x shielded RJ45 (hub) Line length: Max. 100 m between 2 stations (segment length) Transfer rate: 100 Mbit/s: Transfer: Physical layer: 100BASE-TX: Half-duplex: Yes: Full-duplex: No: Autonegotiation: Yes: Auto-MDI/MDIX: Yes: Hub propagation delay: 0.96 to 1 µs: Controller: POWERLINK MAC. Online support for Dell EMC products is currently available on both Dell's support site and the Dell Community Forum on the EMC Powerlink site. To access Powerlink you must have a user name and password for that site. Your Dell login information will not work on Powerlink. If you are a Dell EMC.

Overview

This PowerLink allows section and user details to be passed in a secure manner to a script on another web-based application serverwhich may then use this data to perform, for example, a single signon process. The configuration options allow the details to bepassed to be selected as well as the parameter names to be used for each value. Additional user-specified parameters may also bedefined. The data is passed to the specified URL as a set of name/value pairs in the query string. They are secured by means ofa shared secret to generate a message authentication code (MAC) which is also passed to the other application. The technique adoptedis identical to that used by Blackboard themselves and as documented in the Automatic Signon Protocol documentation.

A movie illustrating the use of this PowerLink can be found in the Configuration settings section below. A presentationgiven about the development of the PowerLink is also available from theBlackboardDevelopers Conference 2007 presentations page on the EduGarage site.

System requirements

The login2 PowerLink is written for WebCT Vista 4.1.1 (or higher) and WebCT Campus Edition 6.1.1 (or higher).It requires the webctdao.jar module to be installed on the application servers.(From version 2.1 of login2, WebCTDAO 2.3, or higher, is required.)

Installation

This PowerLink is installed in the same way as any other WebCT Vista 4 PowerLink:

1. Create a directory called login2 in the deployablecomponents area of the WebCT domain directory on each application server (including the administration server for a cluster).
2. Copy the login2.jar file into the login2 directory.
3. Copy the webctdao.jar file into the common directory in the deployablecomponents area of the WebCT domain directory on each application server (including the administration server for a cluster). Create this directory if does not already exist.
4. Restart the WebCT service.
5. Log into WebCT as serveradmin.
6. In the Utilities, Settings area click on the link labelled login2 Module in the System Integration column.
7. Enable the tool by selecting the radio button labelled True for the enable setting and click on the Save Values button at the bottom of the page.
8. In the Utilities, PowerLinks Proxy Tools area click on the Add Proxy Tool button.
9. Select login2 Module from the drop-down list and click on the Next button.
10. Enter details as required in the boxes provided; for example:
    • Proxy Tool Name: Connect to Mediawiki
    • Version: 1.0
    • Description: Perform a single signon connection to the Mediawiki tool
    (Note: the Proxy Tool Name is what will appear to Section Designers when they add the tool to their sections.) Click on the Save button.
11. In the Utilities, Settings area click on the link labelled with the Proxy Tool Name entered in the previous step which should appear in the Tools column.
12. Enter the required values for each of the settings (see the Configuration section below for a description of each setting). Lock any values which should not be changed by other users. Click on the Save button.

Configuration settings

The login2 PowerLink supports the passing of the following parameters:

• D: section designer or section instructor
• TA: teaching assistant
• S: student or auditor

• SDES: section designer
• SINS: section instrutor
• STEA: teaching assistant
• SSTU: student
• SAUD: auditor

Each of these parameters may be passed to the other application by specifying a name for the parameterin the setting field. For example, entering a value of userid against theWebCT user ID setting will add userid=abcdef to the query string (where abcdef isthe user's WebCT ID). When the value of a setting is left blank (or set to NA) the parameter is notpassed to the other application. Note: a setting value of NA is treated as an empty string;this is a workaround to the SDK bug relating to locked empty settings (see theknown issues page for details).

Due to a bug in WebCT, the value for the server- or institution-level shared secret settingsshould be edited for the module in the System Integrationcolumn of the Utilities area and not for the proxy tool itself in the tools column (see theknown issues page for details).

The following settings are also used to configure the login2 PowerLink:

URL for external system connection (_URL)

The URL of the script on the application server to which the WebCT user is to be transferred. This script should be written to verify the authenticity of the data being passed to it before performing any necessary actions, such a logging the user in.

Configure this tool externally?

Set to Yes to use the assisted configuration option (see below); otherwise set to No for settings to be edited via the WebCT form.

Name of configure tool button

The label used for the button when using the assisted configuration option (see below).

The following settings are required to have values specified for them:

• URL for external system connection
• Server-level shared secret (default is SECRET)
• Configure this tool externally? (default is No)

View movie illustration (7:00 minutes)

Usage

As a simple example, assume that the following settings have been set and all others are left empty (or set toNA):

When the proxy tool instance is clicked from within a section it will redirect the user to the following URL:
https://www.other.server.com/script?sectionid=Biology1A&userid=student58&name=George%20Smith&status=S&time=1191196800&mac=D3E170AEED79A10994CB9E128D80FAAF
where:

• the current section has a source ID of Biology1A
• the current user is a student in the section with a WebCT ID of student58 and a name of George Smith
• the current time is midnight on 1 October 2007 (GMT)

Details of how to calculate a MAC are documented in the Automatic Signon Protocol Cardhop 1 0 2 – manage your contacts onto. guide from Blackboard which alsoincludes sample code.

The script being redirected to might then perform the following operations:

1. Check the timestamp is within permitted limits of the current time
2. Verify the Message Authentication Code (MAC) by using the shared secret
3. Check that a resource exists on the server for the specified course
4. Check if an account exists for the user and either create one or check the name and status are up-to-date
5. Ensure the user has the appropriate permissions given their status
6. Log the user into the system and redirect them to the main page

Assisted configuration

An alternative method of configuring a PowerLink is via assisted configuration. Rather thanentering the appropriate values for each setting via a generic web form within WebCT, the control ofspecifying these values is passed to a customised form or script. This not only allows a more user-friendly interfaceto be provided but also allows related processing to be performed on other web servers (e.g. if connectingto a wiki, a new space can be created when the link is added to the section). The main disadvantage of thisconfiguration method is that values of settings cannot be changed once they have been set.

When using the assisted configuration method for specifying the setting values for thelogin2 the initial settings should be configured as follows:

URL for external system connection

The URL of the script which will initiate the assisted configuration process. This script would normally reside on the same server as WebCT users will be transferred to via this PowerLink. It may interact with the user to determine their preferences before redirecting them back to this PowerLink with any required settings (see below for more details).

Configure this tool externally?

Should be set to Yes when using the assisted configuration option.

Name of configure tool button

The label used for the button which redirects users to the assisted configuration script.

In addition to the above settings, a name should be specified for any of the parameters which should bepassed to the configuration script. For example, when connecting to a wiki, the section ID and title might be passedso that a new space can be created using the same code and main page set up with the title. Additional parametersare automatically included to facilitate the authentication process when returning control back to WebCT. Theseare:

• ac_guidparam: the name of the parameter used to pass the GUID for the instance of the proxy tool which initiated the configuration request
• GUID parameter: the value of the GUID for the proxy tool instance
• ac_userid: the WebCT ID of the user initiating the configuration request
• ac_returnurl: the URL to redirect to complete the configuration process

The typical tasks of a configuration script are as follows:

Check timestamp

if a timestamp has been passed in the query string (which is recommended to improve security) then this should be checked to ensure that it is within acceptable limits of the current time

Check MAC

if a message authentication code (MAC) has been passed in the query string (which is recommended to improve security) then this should be checked using the shared secret

Confirm action (optional)

if appropriate, interact with the use to confirm the action being requested and/or the values of any optional settings

Initialise system (optional)

perform any processing required to allow the section from which the request is being made to access the application; e.g. for a wiki it may be necessary to create a space dedicated to the section

Configure PowerLink instance

redirect the user to the PowerLink with any changes to the settings passed in the query string

Example

As a simple example, assume that the following settings have been set and all others are left empty (or set toNA): Forgiveness.

When an instance of this proxy tool is added to a section, a form is displayed containing a field in which to enterthe name for the link and a configure button with the name specified (Create a link in this example).Clicking on this button will redirect the section designer to the following URL:
https://www.other.server.com/a_script?ac_guidparam=proxyToolCallbackGUID&proxyToolCallbackGUID=1191196800000&ac_userid=instructor1
&ac_returnurl=https://www.webct.server.com/webct/urw/sslogin2.snSource.siId/cobaltMainFrame.dowebct
?appforward=/webct/viewMyWebCT.dowebct§ionid=Biology1A&title=Biology%201A&time=1191196800&mac=05505DB2C79098D8C1A8D05ABF003882
where:

• the current section has a source ID of Biology1A
• the current user is a student in the section with a WebCT ID of student58 and a name of George Smith
• the current time is midnight on 1 October 2007 (GMT)

After completing any necessary processing, the configuration script should redirect the user back to WebCT passing any parameter valueswhich need to be set, changed or cleared. For example, to configure the proxy tool to be the same as the simple non-assisted exampleabove, the user should be redirected as follows:
https://www.webct.server.com/webct/urw/sslogin2.snSource.siId/cobaltMainFrame.dowebct?
appforward=/webct/viewMyWebCT.dowebct&proxyToolCallbackGUID=1191196800000&ac_userid=instructor1&
_URL=https://www.other.server.com/script&_Title=
This will update the value of the URL parameter, clear the setting for the title parameter; the values of the section ID, time, MAC and shared secretparameters will remain unchanged. (Note that, for security reasons, it is not possible to change the value of any of the shared secrets by passing new values back in theredirection URL.)

The above example, relies on the fact that the URL and title parameters are not locked at a level above the section. This means, therefore,that they are subject to change by a section designer before adding the proxy tool to their section. To avoid this an alternativestrategy is to initialise the proxy tool with all the settings required for configuration and single sign-on so that none of them requireschanging during the configuration process - the configuration script can be used merely to perform any related processing on the otherserver. This script can be used to process both a configuration request and a single sign-on request by checking for the presence of one of theconfiguration parameters (e.g. ac_guidparam). If the parameter is present then the configuration action is performed, if it isnot then a single sign-on action is performed. All the proxy tool settings may then be locked so that section designers are unable totamper with them, either intentionally or unintentionally! The video illustration presented in theConfiguration section above show this technique in action.

Troubleshooting

If you experience any problems using this PowerLink try the following to trace the cause:

• inspect the webct.log file for any reported errors
• check that the URL being used by the proxy tool instance is valid
• inspect the log files for the server to which the user is being redirected to see if a connection had been recorded
• add a line containing log4j.category.com.spvsoftwareproducts=DEBUG to the log4j.properties file in the serverconfs directory; this will increase the logging level for the PowerLink

Version history

Upgrade instructions

The following instructions provide a guide to the process of upgrading to a later release of this PowerLink. You are,however, strongly advised to follow them in conjunction with the installation instructions above, the administrator documentationprovided for your release of WebCT, and to first try them on a test server.

Upgrading from version 1.0.00 to version 1.0.01

1. Shut down WebCT
2. Remove the old PowerLink jar file
3. Add the new PowerLink jar file
4. Restart WebCT

Any existing proxy tool instances should continue working as before.

Upgrading from version 1 to version 2+

1. Make a note of any values entered for the server- or institution-level shared secret settings (as these will need to be re-entered as part of the upgrade process)
2. Shut down WebCT
3. Remove the old PowerLink jar file
4. Remove the authmoduledata utility file (unless it is being shared by other PowerLinks)
5. Add the new PowerLink jar file
6. Ensure the WebctDAO utility file is available on the server
7. Restart WebCT
8. Log into WebCT as serveradmin
9. In the Utilities, Settings area click on the link labelled login2 Module in the System Integration column
10. Enable the tool by selecting the radio button labelled True for the enable setting, re-enter any value entered for the server-level shared secret setting, and click on the Save Values button at the bottom of the page
11. If a value was previously entered for the institution-level shared secret settings this should also be re-entered at the server, domain or institution level, as appropriate

After following the above steps. existing proxy tool instances should continue to work but none of the new settings will be available.To enable the new settings continue as follows: Split and concat mac download.

1. In the Utilities, PowerLinks Proxy Tools area click on the Proxy Tool Name for a proxy tool created based on this PowerLink
2. Do not change the values of any settings but just click on the Save button at the bottom of the page
3. In the Utilities, Settings area click on the link in the Tools column labelled with the Proxy Tool Name
4. Tick the Unlock this setting box against the Enable Tool setting
5. Click on the Save button at the bottom of the page
6. Repeat the above steps for all proxy tools based on this PowerLink

The above steps will leave the proxy tool disabled in each section irrespective of any previous setting. It may be enabled for allsections as follows:

1. In the Utilities, Settings area click on the link in the Tools column labelled with the Proxy Tool Name
2. Select True for the Enable Tool setting
3. Click on the Save button at the bottom of the page

Powerlink For Mac Download

The enable setting may also be changed at lower levels of the learning context hierarchy (for example, at the sectionlevel). Sketchup web browser. However, there is no known way of restoring the values for the enable setting as they existed before the upgrade.

Upgrading from version 2.0 or 2.1

Powerlink For Mac Free

1. Shut down WebCT
2. Remove the old PowerLink jar file
3. Add the new PowerLink jar file
4. Ensure the WebctDAO (2.3 or later) utility file is available on the server
5. Restart WebCT

Any existing proxy tool instances should continue working as before.

Licence

Powerlink Machine (uk) Co. Ltd

This work is written by Stephen Vickers and is released under aCreative Commons GNU General Public Licence.The login2 PowerLink can be downloaded from OSCELOT whereit is also possible to report bugs and submit feature requests.