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Introduction This document provides answers to some frequently asked questions about the Remote Desktop Protocol (RDP) plug-in, available to Cisco Adaptive Security Appliance (ASA) Clientless Secure Sockets Layer VPN (SSLVPN) users. The RDP plug-in is only one of the plug-ins available to users, along with others such as Secure Shell (SSH), Virtual Network Computing (VNC), and Citrix. The RDP plug-in is one of the most frequently used plug-ins in this collection.
This document provides more details about the deployment and troubleshoot procedures for this plug-in. Note: This document does not provide information about how to configure the RDP plug-in. One Piece Pirate Warriors 1 Pc Utorrent App more.
For additional information, refer to the. Background Information The RDP plug-in has evolved from a pure Java-based RDP plug-in, to include both ActiveX RDP Client (Internet Explorer), as well as Java Client (Non-Internet Explorer browsers). Java Plug-In The Java RDP Client utilizes the applet. The Java applet is then wrapped within a plug-in that allows installation within the ASA clientless portal. Active-X Plug-In The RDP plug-in also includes the Microsoft ActiveX RDP Client, and the plug-in determines whether to use Java or ActiveX Client based on the browser.
That is: • If Internet Explorer (IE) users attempt to use RDP through a Clientless SSLVPN Portal, and the bookmark URL does not contain the ForceJava=true argument, then the ActiveX Client is used. If ActiveX fails to execute, the plug-in initiates the Java client. • If non-IE users attempt to launch an RDP bookmark or URL, only the Java Client is launched. For more information on requirements for RDP ActiveX and USER privileges, reference the Microsoft article.
The next image illustrates the three links that can be selected within the browser window after the plug-in is launched: • New Portal Page - This link opens the portal page in a new browser window. • Full-Screen - This uses the RDP window in full-screen mode.
• Reconnect with Java - This forces the plug-in to reconnect and use Java instead of ActiveX. RDP Plug-In RDP and RDP-2 Plug-In Usage • RDP plug-in: This is the original plug-in created that contains both the Java and ActiveX Client.
• RDP2 plug-in: Due to changes within the RDP protocol, the Proper Java RDP Client was updated in order to support Microsoft Windows 2003 Terminal Servers and Windows Vista Terminal Servers. Tip: The latest RDP plug-in combines both RDP and RDP2 protocols. As a result the RDP2 plug-in is obsolete. It is recommended to utilize the most-recent version of the RDP plug-in.
The RDP plug-in nomenclatures follows this structure: rdp-plugin.yymmdd.jar,where yy is a two-digit year format, mm is a two-digit month format, and dd is a two-digit day format. In order to download the plug-in, visit the. ActiveX Versus Java Client Positioning RDP-ActiveX • Uses IE only • Provides support for forwarded sound RDP-Java • Works on all supported browsers that are Java-enabled. • Java Client is launched in IE only if ActiveX fails to launch, or the ForceJava=true argument passes in the RDP bookmark.
• RDP-Java implementation is based on Proper Java RDP project, an open-source initiative; best-effort support is provided for the application. RDP Bookmark Format Here is an example format of an RDP bookmark: rdp://server:port/?Parameter1=value&Parameter2=value&Parameter3=value Here are some important notes about the format: • server - This is the only required attribute. Enter the name of the computer that hosts the Microsoft Terminal Services. • port (optional) - This is the virtual address within the remote computer that hosts the Microsoft Terminal Services. The default value, 3389, matches the well-known port number for Microsoft Terminal Services.
• parameters - This is an optional query string that consists of parameter-value pairs. A question mark demarks the beginning of the argument string, and each parameter-value pair is separated by an ampersand. Here is a list of available parameters: • geometry - This is the size of the client screen in pixels (W x H). • bpp - This is the bits-per-pixel (color depth), 8 16 24 32. • domain - This is the login domain.
• username - This is the username for login. • password - This is the login password. Use the password with care, because it is used at the client-side and can be observed. • console - This is used in order to connect to the console session on the server (yes/no). • ForceJava - Set this parameter to yes in order to use only the Java Client. The default setting is no. • shell - Set this parameter to the path of the executable/application that is started automatically when you connect with RDP ( rdp://server/?shell=path, for example).
Here is a list of additional ActiveX-only parameters: • RedirectDrives - Set this parameter to true in order to map remote drives locally. • RedirectPrinters - Set this parameter to true in order to map remote printers locally. • FullScreen - Set this parameter to true in order to launch in FullScreen mode. • ForceJava - Set this parameter to yes in order to force the Java Client. • audio- This parameter is used for audio forwarding over the RDP session: • 0 - Redirects remote sounds to the client computer. • 1 - Plays sounds at the remote computer.
• 2 - Disables sound redirection; does not play sounds at the remote server. RDP Plug-In and VPN Load-Balancing Multi-geography load-balancing is supported with use of Domain Name Server (DNS)-based. Due to DNS result caching differences, plug-ins might operate differently across varied operating systems. Windows DNS cache allows the plug-in to resolve the same IP address when it lauches the Java applet. On Macintosh (MAC) OS X, it is possible for the Java applet to resolve a different IP address. As a result, the plug-in fails to launch correctly. An example of DNS round-robin is when you have a single URL () where the DNS entry for www.example.com can resolve either 192.0.2.10 (ASA1) or 198.51.100.50 (ASA2).
After the user logs into the Clientless-WebVPN portal via a browser on ASA1, initiaition of the RDP plug-in is possible. During the initiation of the Java client, MAC OS X computers execute a new DNS resolution request. With a round-robin DNS configuration, there is a 50% chance that this second resolution response returns the same site that was chosen for the initial WebVPN connection. If the DNS server response is 198.51.100.50 (ASA2) rather than 192.0.2.10 (ASA1), the Java client initiates a connection to the wrong ASA (ASA2). As the user session does not exist on the ASA2, the connection request is rejected. This might result in Java error messages similar to this: java.lang.ClassFormatError: Incompatible magic value in class file net/propero/rdp/applet/RdpApplet FAQs Why do some typed characters not appear on the remote RDP session?
The remote computer in the RDP session might have a different keyboard region setting than the local computer. Due to this difference, the remote computer might not display certain typed characters or incorrect characters. This behavior is seen with only with the Java plug-in. In order to resolve this problem, use the keymap attribute in order to map the local keymap into the remote PC.
For example, in order to set a German keyboard mapping, use: rdp:///?keymap=de The following keymaps are available: --------------------------------------------------------------------- ar de en-us fi fr-be it lt mk pl pt-br sl tk da en-gb es fr hr ja lv no pt ru sv tr --------------------------------------------------------------------- Known Issues with Keyboard Mappings • Cisco bug ID CSCth38454 - Implement Hungarian keymap for RDP plug-in. • Cisco bug ID CSCsu77600 - WebVPN RDP plugin window keys are incorrect. Shift (key).jar.
• Cisco bug ID CSCtt04614 - WebVPN - ES keyboard diacritics incorrectly managed by RDP plugin. • Cisco bug ID CSCtb07767 - ASA Plugin - Configure default parameters.
Tip: Another possible workaround is to use an Application Smart Tunnel for mstsc.exe. This is configured under the WebVPN sub-configuration mode with this command: smart-tunnel list RDP_List RDP mstsc.exe platform windows. Can the Java RDP plug-in support full-screen RDP sessions? Currently, there is no native support for full-screen RDP sessions.
Enhancement request CSCto87451 was filed in order to implement this. If the geometry parameter ( geometry =1024x768, for example) is set to the resolution of the user monitor, it operates in full-screen mode. As user screen sizes vary, it might be necessary to create multiple bookmark links. The ActiveX client natively supports full-screen RDP sessions. Can the Java client communicate with use of AES-256 for encryption?
I have a cisco ASA running 9.2. I have the rdp plugin installed version rdp.jar. The desktop client is running Windows 7 64 bit with Internet Explorer 11 I cannot get the webvpn RDP session to go to full screen. I have tried the following: rdp://FQDNServer/?FullScre en rdp://FQDNServer/?FullScre en=True rdp://FQDNServer/?geometry =1204x768& FullScreen =True If I understand things correctly, there should be an Active X control being pushed down to the client, and only the Active X version of the plugin will run full screen. I am getting no prompts to install an Active X control. Note that the rdp session I am getting does work, I just can get it to go full screen Can someone clue me in on what I doing wrong?
It should be working but only if the used client is the RDP one launched by Active X and not the Java One - i.e you used WebVPN from Internet Explorer and have security settings allowing Active X. Do also use CISCO rdp2 plugin and IE to connect. Below is a good reference to the plugin - pls see 'RDP Bookmark Format' and 'Troubleshoot RDP Issues' Can the Java RDP plug-in support full-screen RDP sessions?
Currently, there is no native support for full-screen RDP sessions. Enhancement request CSCto87451 was filed in order to implement this. If the geometry parameter (geometry =1024x768, for example) is set to the resolution of the user monitor, it operates in full-screen mode.
As user screen sizes vary, it might be necessary to create multiple bookmark links. The ActiveX client natively supports full-screen RDP sessions. Tip: The latest RDP plug-in combines both RDP and RDP2 protocols. As a result the RDP2 plug-in is obsolete. It is recommended to utilize the most-recent version of the RDP plug-in.
The RDP plug-in nomenclatures follows this structure: rdp-plugin.yymmdd.jar,wher e yy is a two-digit year format, mm is a two-digit month format, and dd is a two-digit day format. Pse see below from previous link, I do not have further access to the CISCO login portal on those bug and probably you can check out more. ActiveX Client Symptoms: ActiveX Client fails to load from IE Versions 6 through 9 after an upgrade to ASA OS Version 8.4.3. -Refer to Cisco bug ID CSCtx58556.
The fix is available for Versions 126.96.36.199 and later. -Workaround: Force the use of the Java Client. Symptoms: ActiveX Client fails to load after the ASA OS Version is downgraded to a version prior to 8.4.3. This affects users that have used the ActiveX client on an ASA with the fix for Cisco bug ID CSCtx58556, and connect to this ASA with a version prior to 8.4.3. This is due to a new ActiveX RDP plug-in introduced in ASA Version 8.4.3, which is not compatible with the earlier versions.
-Refer to Cisco bug ID CSCtx57453. -Remove all Windows registry instances of b8e-4384-8d27-4e a1b4c01232? (old ActiveX CLSID).
There is another more extensive write up on the plugin What to do: - Keep in mind both CSCtx58556 and CSCtx57453, while deploying company-wide ASA based SSLVPN Service. Either use 8.4.3 and above or 8.4.2 and below - If you are a returning RDP user i.e. You have used 8.4.3 based ActiveX RDP and now need to use 8.4.2 or below ActiveX RDP over the SSLVPN Portal: - Remove all registry instances of 'b8e-4384-8d27-4 ea1b4c0123 2? (old activex CLSID) using regedit Note: this should be only done after a backup of the registry. Should be done at your own risk and consult Microsoft support for further information.
To further add on verifying ActiveX The best way to get this working is to add the ASA as a trusted site within IE. By doing this you allow the browser permission to run activex controls and content from the ASA that IE otherwise would classify as a security vulnerability in order to avoid browser exploits.
The ActiveX control is automatically pushed down from the ASA at the time you browse to a url with the format RDP://. On Windows XP it is saved in C: WINDOWS Downloaded Program Files. You can find all the plugins currently installed in your browser from IE >Tools >Internet Options >General >Browsing History Settings >View objects.
The filename is 'CISCO Portforwarder Control'. If you're running a relatively recent ASA image (188.8.131.52,8.2.2, 8.3.1)you should see version 1,0,0,7 pushed down to you. If you copy the file from an already installed PC you should probably be able to install it on any other PC. But this shouldn't be necessary as the latest version will be pushed to you upon initiating a webvpn RDP session using the ASA. We also want to make sure the activeX is really push down and not the java version using the IE To see the add-ons installed in Internet Explorer 9 Open Internet Explorer by clicking the Start button Picture of the Start button. In the search box, type Internet Explorer, and then, in the list of results, click Internet Explorer. Click the Tools button Tools button, and then click Manage add-ons.
Under Add-on Types, click Toolbars and Extensions. Under Show, you can select one of the following views of your add-ons: To display a complete list of the add-ons on your computer, click All add-ons. To display only those add-ons that were needed for the current webpage or a recently viewed webpage, click Currently loaded add-ons. To display add-ons that were preapproved by Microsoft, your computer manufacturer, or a service provider, click Run without permission.
When you're finished, click Close.