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Table Of Contents
Using Virtual Network Computing Version 4.1
Installing and Configuring VNC
Starting a Remote Server from the Master Server
Using the Master Server to Perform Tasks on the Remote Server
Cisco Product Security Overview
Reporting Security Problems in Cisco Products
Obtaining Technical Assistance
Cisco Technical Support & Documentation Website
Definitions of Service Request Severity
Obtaining Additional Publications and Information
Using Virtual Network Computing Version 4.1
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.
Contents
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Installing and Configuring VNC
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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 2000.4.2 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, 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 on all servers that will use VNC.
Procedure
Step 1
C:\utils\VNC\
Step 2
The Welcome window displays.
Step 3
Step 4
Step 5
Step 6
Step 7
Step 8
The Ready to Install window displays.
Step 9
The VNC Server Properties window displays, as show in Figure 1.
Figure 1 VNC Server Properties Window
Step 10
You can enter a password of up to eight characters. You will use this password to open a VNC session between servers.
Step 11
Step 12
Step 13
Step 14
Step 15
Starting a Remote Server from the Master Server
To start a remote server via VNC, perform the following procedure:
Procedure
Step 1
Step 2
Step 3
The Select Computer dialog box displays.
Step 4
Step 5
Step 6
Step 7
Step 8
Using the Master Server to Perform Tasks on the Remote Server
Perform the following procedure to complete installation or configuration tasks via VNC:
Procedure
Step 1
The Connection Details dialog box displays, as shown in Figure 2.
Figure 2 Connection Details dialog box
Step 2
Step 3
The VNC Authentication dialog box displays, as shown in Figure 3.
Figure 3 VNC Authentication Dialog Box
Step 4
Step 5
The desktop of the remote server displays.
Step 6
Caution
Note
Step 7
Step 8
Troubleshooting
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.
Obtaining Documentation
Cisco documentation and additional literature are available on Cisco.com. Cisco also provides several ways to obtain technical assistance and other technical resources. These sections explain how to obtain technical information from Cisco Systems.
Cisco.com
You can access the most current Cisco documentation at this URL:
http://www.cisco.com/techsupport
You can access the Cisco website at this URL:
You can access international Cisco websites at this URL:
http://www.cisco.com/public/countries_languages.shtml
Product Documentation DVD
Cisco documentation and additional literature are available in the Product Documentation DVD package, which may have shipped with your product. The Product Documentation DVD is updated regularly and may be more current than printed documentation.
The Product Documentation DVD is a comprehensive library of technical product documentation on portable media. The DVD enables you to access multiple versions of hardware and software installation, configuration, and command guides for Cisco products and to view technical documentation in HTML. With the DVD, you have access to the same documentation that is found on the Cisco website without being connected to the Internet. Certain products also have .pdf versions of the documentation available.
The Product Documentation DVD is available as a single unit or as a subscription. Registered Cisco.com users (Cisco direct customers) can order a Product Documentation DVD (product number DOC-DOCDVD=) from Cisco Marketplace at this URL:
http://www.cisco.com/go/marketplace/
Ordering Documentation
Beginning June 30, 2005, registered Cisco.com users may order Cisco documentation at the Product Documentation Store in the Cisco Marketplace at this URL:
http://www.cisco.com/go/marketplace/
Nonregistered Cisco.com users can order technical documentation from 8:00 a.m. to 5:00 p.m. (0800 to 1700) PDT by calling 1 866 463-3487 in the United States and Canada, or elsewhere by calling 011 408 519-5055. You can also order documentation by e-mail at tech-doc-store-mkpl@external.cisco.com or by fax at 1 408 519-5001 in the United States and Canada, or elsewhere at 011 408 519-5001.
Documentation Feedback
You can rate and provide feedback about Cisco technical documents by completing the online feedback form that appears with the technical documents on Cisco.com.
You can send comments about Cisco documentation to bug-doc@cisco.com.
You can submit comments by using the response card (if present) behind the front cover of your document or by writing to the following address:
Cisco Systems
Attn: Customer Document Ordering
170 West Tasman Drive
San Jose, CA 95134-9883We appreciate your comments.
Cisco Product Security Overview
Cisco provides a free online Security Vulnerability Policy portal at this URL:
http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html
From this site, you can perform these tasks:
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A current list of security advisories and notices for Cisco products is available at this URL:
If you prefer to see advisories and notices as they are updated in real time, you can access a Product Security Incident Response Team Really Simple Syndication (PSIRT RSS) feed from this URL:
http://www.cisco.com/en/US/products/products_psirt_rss_feed.html
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 might have identified a vulnerability in a Cisco product, contact PSIRT:
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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.
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In an emergency, you can also reach PSIRT by telephone:
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Tip
Never use a revoked 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:
http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html
The link on this page has the current PGP key ID in use.
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:
http://www.cisco.com/techsupport
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:
http://tools.cisco.com/RPF/register/register.do
Note
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:
http://www.cisco.com/techsupport/servicerequest
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: 1 800 553-2447For a complete list of Cisco TAC contacts, go to this URL:
http://www.cisco.com/techsupport/contacts
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)—Your 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 operation 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 your network is impaired, but 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.
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http://www.cisco.com/go/marketplace/
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http://www.cisco.com/go/iqmagazine
or view the digital edition at this URL:
http://ciscoiq.texterity.com/ciscoiq/sample/
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http://www.cisco.com/en/US/products/index.html
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http://www.cisco.com/discuss/networking
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http://www.cisco.com/en/US/learning/index.html
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