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Browser Plug-ins
One of the ways the functionality of the Clientless SSL VPN webpage can be extended is through the use of plug-ins that are uploaded to the ASA and installed. Once this is done, various other functionalities can be added.
Cisco distributes and recommends for main plug-ins, including the following:
- Terminal Services (RDP)
- Terminal Services, Vista, Windows 2003 R2 (RDP2)
- Secure Shell/Telnet
- Virtual Network Computing Services (VNC)
The configuration and installation of these plug-ins is very simple; the first step involves obtaining the plug-ins from Cisco. (These files are located under the ASA download software section of the Cisco website.)
Once the files have been retrieved. they must be uploaded to the ASA via TFTP; this process is similar to uploading updated software to the ASA (or any other Cisco device).
Once the plug-in has been placed on the ASA. the import configuration is simple and is shown in Table 4.
Table 4: Clientless SSL VPN Plug-in Importation
|
1 |
Import a WebVPN (Clientless SSL VPN) plug-in. Note: The protocol for the Cisco distributed plug-ins include rdp, rdp2, ssh,telnet (no space), and vnc |
asa#import webvpn plug-in protocol protocol URL |
An example of what the Clientless SSL VPN webpage will look like after a plug-in has been imported is shown in Figure 4. For this example, the SSH/Telnet plug-in was imported.
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Figure 4 Clientless SSL VPN plug-in example