Table Of Contents
Using Virtual Network Computing Version 4.1.2
Virtual Network Computing (VNC) allows a system administrator to use a server to install applications or perform configuration tasks on a remote server while the user of the remote server views the tasks that occur. In this way, VNC operates similar to Microsoft Terminal Services.
Before You Begin
Review the following information before you install VNC:
About VNC Terminology
In this document, master server refers to the server where the user initiates, performs, and manages tasks; the remote server receives the software or configuration information from the master server.
About Compatible Operating System Versions
Make sure that you have installed Cisco-provided operating system version 2000.4.4 (or later) on all servers that will use VNC. For information on upgrading the operating system, refer to the documentation for the version of the Cisco CallManager upgrade that runs in the cluster.
About Security Risks
Be aware that using VNC poses a security risk by making the cluster vulnerable to attacks.
Installing VNC opens a network port, which may make the server vulnerable to attacks. A network scanner will show port 5900 "VNC => Remote Control Software" and allow an attacker to access the server.
During the VNC installation, enter a complex alphanumeric password for VNC. VNC limits the password to eight characters.
To minimize security risks, set the VNC service to Manual startup and start it only during remote management. This action ensures that users must enter a Windows user name/password that the server can authenticate before starting the service.
If you no longer plan to use Terminal Services for remote management, disable Terminal Services.
About Upgrading VNC
When you upgrade the operating system or run an operating system patch on the server, make sure that you review the operating system readme document for information on upgrading VNC. Cisco provides the VNC upgrade files in the operating system upgrade and/or operating system support patch, although Cisco does not automatically install these files on the server.
About Older Versions of VNC
Before you install VNC 4.1.2, uninstall any previous version of VNC that exists on the server. To uninstall VNC, choose Start > Programs > Settings > Add/Remove Programs.
About CPU Utilization
VNC may use a large percentage of CPU when you move the mouse and particularly when you move entire windows on the desktop. To minimize CPU utilization, limit unnecessary movements on the desktop, particularly while the server is in production.
Installing and Configuring VNC
Perform the following procedure to install and configure VNC Version 4.1.2 on all servers that will use VNC.
Step 1 Using Windows Explorer, browse to the following folder:
Step 2 In the VNC folder, double-click vnc-4.1_2-x86_win32.exe.
The Welcome window displays.
Step 3 Click Next.
Step 4 To accept the software license agreement, click I accept the agreement; then, click Next.
Step 5 In the Select Destination Directory, accept the default location or choose another folder where you want to install VNC; then, click Next.
Step 6 In the Select Components window, click Next.
Step 7 In the Select Start Menu Folder window, accept the default folder name or choose another folder where you want the setup program to create the program shortcuts; then, click Next.
Step 8 In the Select Additional Tasks window, check the Register VNC Server as a system service check box and the Start the VNC Server System service check box. If you want to create additional icons, check the check box next to the icons that you want to create; then, click Next.
The Ready to Install window displays.
Step 9 Click Install.
The VNC Server Properties window displays, as show in Figure 1.
Figure 1 VNC Server Properties Window
Step 10 In the Authentication pane, choose the VNC Password Authentication radio button and click Configure to enter a password in the Password and Confirm Password fields.
You can enter a password of up to eight characters. You will use this password to open a VNC session between servers.
Step 11 In the Password window, click OK.
Step 12 Click the Connections tab; then, uncheck the Serve Java viewer via HTTP on port: 5800 check box.
Step 13 In the VNC Server Properties window, click OK.
Step 14 To continue the setup, click Next.
Step 15 Click Finish.
Starting a Remote Server from the Master Server
To start a remote server via VNC, perform the following procedure:
Step 1 From the master server, map a drive to the remote server by using the server name (not the IP address).
Step 2 Right-click My Computer and choose Manage.
Step 3 Choose Action > Connect to another computer....
The Select Computer dialog box displays.
Step 4 In the Name field, enter the name of the server to which you want to connect; then, click OK.
Step 5 In the Computer Management window, double-click Services and Applications.
Step 6 If an Internet Services Manager dialog displays, click Yes.
Step 7 Click Services.
Step 8 Right-click VNC Server Version 4; then, choose Start.
Using the Master Server to Perform Tasks on the Remote Server
Perform the following procedure to complete installation or configuration tasks via VNC:
Step 1 On the master server, choose Start > Programs > RealVNC > VNC Viewer 4 > Run VNC Viewer.
The Connection Details dialog box displays, as shown in Figure 2.
Figure 2 Connection Details dialog box
Step 2 In the Server field, enter the IP address of the remote server on which you want to install the software or perform a configuration task.
Step 3 Click OK.
The VNC Authentication dialog box displays, as shown in Figure 3.
Figure 3 VNC Authentication Dialog Box
Step 5 Click OK.
The desktop of the remote server displays.
Step 6 From the master server, install software or perform configuration tasks on the remote server.
Caution Make sure that you insert installation CD-ROMs into the CD-ROM drive of the remote server or download the files from the web onto the remote server.
Note When you are using a remote terminal over VNC to install Cisco CallManager on an IBM server, the procedure may seem to stall or hang during the installation. On the remote terminal, if you move (drag) the VNC window or refresh the screen by choosing Request screen refresh from the VNC application window menu (the menu that displays when you click the VNC icon in the left corner of the window title bar), the procedure will continue.
Step 7 Stop the VNC Server service.
Step 8 Perform the procedures in the "Starting a Remote Server from the Master Server" section and in the "Using the Master Server to Perform Tasks on the Remote Server" section for each remote server on which you want to perform installation or configuration tasks.
If you run VNC to install/upgrade Cisco CallManager on IBM xSeries servers, the installation may appear to hang when the server is copying the files during the installation. Move the mouse to continue the installation.
When VNC is used, some servers exhibit high CPU utilization. The server response may be slower than usual.
Cisco documentation and additional literature are available on Cisco.com. This section explains the product documentation resources that Cisco offers.
You can access the most current Cisco documentation at this URL:
You can access the Cisco website at this URL:
You can access international Cisco websites at this URL:
Product Documentation DVD
The Product Documentation DVD is a library of technical product documentation on a portable medium. The DVD enables you to access installation, configuration, and command guides for Cisco hardware and software products. With the DVD, you have access to the HTML documentation and some of the PDF files found on the Cisco website at this URL:
The Product Documentation DVD is created and released regularly. DVDs are available singly or by subscription. Registered Cisco.com users can order a Product Documentation DVD (product number DOC-DOCDVD= or DOC-DOCDVD=SUB) from Cisco Marketplace at the Product Documentation Store at this URL:
You must be a registered Cisco.com user to access Cisco Marketplace. Registered users may order Cisco documentation at the Product Documentation Store at this URL:
If you do not have a user ID or password, you can register at this URL:
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Cisco Product Security Overview
This product contains cryptographic features and is subject to United States and local country laws governing import, export, transfer and use. Delivery of Cisco cryptographic products does not imply third-party authority to import, export, distribute or use encryption. Importers, exporters, distributors and users are responsible for compliance with U.S. and local country laws. By using this product you agree to comply with applicable laws and regulations. If you are unable to comply with U.S. and local laws, return this product immediately.
A summary of U.S. laws governing Cisco cryptographic products may be found at: http://www.cisco.com/wwl/export/crypto/tool/stqrg.html. If you require further assistance please contact us by sending email to email@example.com.
Cisco provides a free online Security Vulnerability Policy portal at this URL:
From this site, you will find information about how to do the following:
•Report security vulnerabilities in Cisco products
•Obtain assistance with security incidents that involve Cisco products
•Register to receive security information from Cisco
A current list of security advisories, security notices, and security responses for Cisco products is available at this URL:
To see security advisories, security notices, and security responses as they are updated in real time, you can subscribe to the Product Security Incident Response Team Really Simple Syndication (PSIRT RSS) feed. Information about how to subscribe to the PSIRT RSS feed is found at this URL:
Reporting Security Problems in Cisco Products
Cisco is committed to delivering secure products. We test our products internally before we release them, and we strive to correct all vulnerabilities quickly. If you think that you have identified a vulnerability in a Cisco product, contact PSIRT:
•For emergencies only — firstname.lastname@example.org
An emergency is either a condition in which a system is under active attack or a condition for which a severe and urgent security vulnerability should be reported. All other conditions are considered nonemergencies.
•For nonemergencies — email@example.com
In an emergency, you can also reach PSIRT by telephone:
•1 877 228-7302
•1 408 525-6532
Tip We encourage you to use Pretty Good Privacy (PGP) or a compatible product (for example, GnuPG) to encrypt any sensitive information that you send to Cisco. PSIRT can work with information that has been encrypted with PGP versions 2.x through 9.x.
Never use a revoked encryption key or an expired encryption key. The correct public key to use in your correspondence with PSIRT is the one linked in the Contact Summary section of the Security Vulnerability Policy page at this URL:
The link on this page has the current PGP key ID in use.
If you do not have or use PGP, contact PSIRT to find other means of encrypting the data before sending any sensitive material.
Product Alerts and Field Notices
Modifications to or updates about Cisco products are announced in Cisco Product Alerts and Cisco Field Notices. You can receive Cisco Product Alerts and Cisco Field Notices by using the Product Alert Tool on Cisco.com. This tool enables you to create a profile and choose those products for which you want to receive information.
To access the Product Alert Tool, you must be a registered Cisco.com user. (To register as a Cisco.com user, go to this URL: http://tools.cisco.com/RPF/register/register.do) Registered users can access the tool at this URL: http://tools.cisco.com/Support/PAT/do/ViewMyProfiles.do?local=en
Obtaining Technical Assistance
Cisco Technical Support provides 24-hour-a-day award-winning technical assistance. The Cisco Technical Support & Documentation website on Cisco.com features extensive online support resources. In addition, if you have a valid Cisco service contract, Cisco Technical Assistance Center (TAC) engineers provide telephone support. If you do not have a valid Cisco service contract, contact your reseller.
Cisco Technical Support & Documentation Website
The Cisco Technical Support & Documentation website provides online documents and tools for troubleshooting and resolving technical issues with Cisco products and technologies. The website is available 24 hours a day at this URL:
Access to all tools on the Cisco Technical Support & Documentation website requires a Cisco.com user ID and password. If you have a valid service contract but do not have a user ID or password, you can register at this URL:
Note Use the Cisco Product Identification Tool to locate your product serial number before submitting a request for service online or by phone. You can access this tool from the Cisco Technical Support & Documentation website by clicking the Tools & Resources link, clicking the All Tools (A-Z) tab, and then choosing Cisco Product Identification Tool from the alphabetical list. This tool offers three search options: by product ID or model name; by tree view; or, for certain products, by copying and pasting show command output. Search results show an illustration of your product with the serial number label location highlighted. Locate the serial number label on your product and record the information before placing a service call.
Tip Displaying and Searching on Cisco.com
If you suspect that the browser is not refreshing a web page, force the browser to update the web page by holding down the Ctrl key while pressing F5.
To find technical information, narrow your search to look in technical documentation, not the entire Cisco.com website. On the Cisco.com home page, click the Advanced Search link under the Search box and then click the Technical Support & Documentation radio button.
To provide feedback about the Cisco.com website or a particular technical document, click Contacts & Feedback at the top of any Cisco.com web page.
Submitting a Service Request
Using the online TAC Service Request Tool is the fastest way to open S3 and S4 service requests. (S3 and S4 service requests are those in which your network is minimally impaired or for which you require product information.) After you describe your situation, the TAC Service Request Tool provides recommended solutions. If your issue is not resolved using the recommended resources, your service request is assigned to a Cisco engineer. The TAC Service Request Tool is located at this URL:
For S1 or S2 service requests, or if you do not have Internet access, contact the Cisco TAC by telephone. (S1 or S2 service requests are those in which your production network is down or severely degraded.) Cisco engineers are assigned immediately to S1 and S2 service requests to help keep your business operations running smoothly.
To open a service request by telephone, use one of the following numbers:
Asia-Pacific: +61 2 8446 7411
Australia: 1 800 805 227
EMEA: +32 2 704 55 55
USA: 1 800 553 2447
For a complete list of Cisco TAC contacts, go to this URL:
Definitions of Service Request Severity
To ensure that all service requests are reported in a standard format, Cisco has established severity definitions.
Severity 1 (S1)—An existing network is "down" or there is a critical impact to your business operations. You and Cisco will commit all necessary resources around the clock to resolve the situation.
Severity 2 (S2)—Operation of an existing network is severely degraded, or significant aspects of your business operations are negatively affected by inadequate performance of Cisco products. You and Cisco will commit full-time resources during normal business hours to resolve the situation.
Severity 3 (S3)—Operational performance of the network is impaired while most business operations remain functional. You and Cisco will commit resources during normal business hours to restore service to satisfactory levels.
Severity 4 (S4)—You require information or assistance with Cisco product capabilities, installation, or configuration. There is little or no effect on your business operations.
Obtaining Additional Publications and Information
Information about Cisco products, technologies, and network solutions is available from various online and printed sources.
•The Cisco Online Subscription Center is the website where you can sign up for a variety of Cisco e-mail newsletters and other communications. Create a profile and then select the subscriptions that you would like to receive. To visit the Cisco Online Subscription Center, go to this URL:
•The Cisco Product Quick Reference Guide is a handy, compact reference tool that includes brief product overviews, key features, sample part numbers, and abbreviated technical specifications for many Cisco products that are sold through channel partners. It is updated twice a year and includes the latest Cisco channel product offerings. To order and find out more about the Cisco Product Quick Reference Guide, go to this URL:
•Cisco Marketplace provides a variety of Cisco books, reference guides, documentation, and logo merchandise. Visit Cisco Marketplace, the company store, at this URL:
•Cisco Press publishes a wide range of general networking, training, and certification titles. Both new and experienced users will benefit from these publications. For current Cisco Press titles and other information, go to Cisco Press at this URL:
•Internet Protocol Journal is a quarterly journal published by Cisco Systems for engineering professionals involved in designing, developing, and operating public and private internets and intranets. You can access the Internet Protocol Journal at this URL:
•Networking products offered by Cisco Systems, as well as customer support services, can be obtained at this URL:
•Networking Professionals Connection is an interactive website where networking professionals share questions, suggestions, and information about networking products and technologies with Cisco experts and other networking professionals. Join a discussion at this URL:
•"What's New in Cisco Documentation" is an online publication that provides information about the latest documentation releases for Cisco products. Updated monthly, this online publication is organized by product category to direct you quickly to the documentation for your products. You can view the latest release of "What's New in Cisco Documentation" at this URL:
•World-class networking training is available from Cisco. You can view current offerings at this URL:
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