HP UX IPSec Software manual Maximum Quick Modes, Perfect Forward Secrecy PFS

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proposed value sent by the remote system if it is within the range specified by the IPsec protocol suite.

Windows IKE SA Lifetime Values

By default, Windows XP systems use the following values for preferred IKE key lifetime values:

480 minutes (eight hours)

0 (infinite) IPsec SA negotiations (sessions)

In testing with HP-UX IPSec, HP configured a shorter IKE SA lifetime value on the Windows system. When the Windows system was the initiator, it sent the configured lifetime value to the remote system. When the Windows system was the responder, it accepted the value sent by the HP-UX system but did not send a notification message.

Maximum Quick Modes

HP-UX and Windows enable you to specify the maximum number of IPsec or Quick Mode (QM) negotiations that IKE can complete per IKE SA. Each IPsec SA negotiation establishes two IPsec SAs (one in each direction).

The default maximum QM values are as follows:

HP-UX: 100

Windows: 0 (infinite)

If the value for maximum QM is 1, Perfect Forward Secrecy (PFS) for both keys and identities is implemented. See “Perfect Forward Secrecy (PFS)” (page 43) for more information.

Perfect Forward Secrecy (PFS)

With Perfect Forward Secrecy, the exposure of one key permits access only to data protected by that key. RFC 2409, The Internet Key Exchange (IKE), defines two forms of PFS:

•PFS for both the keys and the IKE identities. PFS is provided for keys in conjuction with PFS for identities. IKE deletes the IKE SA after the IPsec negotiation completes. Each IKE SA is used for only one IPsec negotiation.

The Windows interface refers to this type of PFS as master key PFS.

•PFS for IPsec keys only. The IKE peers perform a key exchange (Diffie-Hellman exchange) to create new keying material for each IPsec negotiation. The IKE SA is re-used until the IKE SA lifetime expires.

The Windows interface refers to this type of PFS as session key PFS.

HP-UX IPSec supports PFS for both the keys and the IKE identities but does not support PFS for IPsec keys only. To be compatible with HP-UX IPSec, do not configure session key PFS on Windows systems.

Configuring PFS is computationally expensive. In most topologies, the strength of the cryptographic algorithms is sufficient protection. HP recommends that you enable PFS only in hostile environments.

IPsec SA Key (Session Key) Lifetime Values

IPsec SA key lifetimes (referred to as session key lifetimes on Windows systems) specify the maximum lifetimes for IPsec SA keys and are specified by units of time (seconds) and by data units transferred (kbytes).

HP-UX IPsec SA Lifetime Values

By default, HP-UX uses the following values for preferred lifetime values:

28,800 seconds (eight hours)

0 (infinite) data units

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Contents HP Part Number J4256-90025 Published June Edition Page Table of Contents Glossary List of Figures Page List of Tables Page Typographic Conventions About This DocumentPage Known Problem with Windows 2000 SP1 and SP2 Testing EnvironmentIntroduction Protocol Implementation Differences Rules Windows IP Security Configuration OverviewTunnel Settings Configuring a Windows Host-to-Host PolicyCreating a Policy IP Security Policy Wizard Adding a RuleRules Tab Creating an IP Filter List Creating the IP Filter List and Filters for the RuleClick OK to return to the Filter Properties dialog box Protocol Tab for Filter Properties Selecting the Filter List for a Rule Configuring Filter Actions for the RuleSecurity Methods for Filter Action Encryption and Integrity Click Apply Selecting the Filter Action Modifying IKE Parameters for the Policy Configuring the Connection Type for the RuleGeneral Policy Properties Dialog Box Master key perfect forward secrecy PFS IKE Security Algorithms Dialog Box Starting the IP Security ServiceAssigning the IP Security Policy Ipsec Services Properties Dialog BoxWindows Configuration Verifying the ConfigurationExample HP-UX Configuration Inbound Tunnel Rule Requirements Configuring a Windows End-to-End Tunnel PolicyConfiguring a Tunnel Rule Outbound Tunnel Rule RequirementsOutbound Rule Outbound Rule Filter Inbound Rule Filter HP-UX Configuration Using IKE Logging on HP-UX Systems Troubleshooting TipsUsing IKE Logging on Windows Systems Disable IKE logging. On Windows XP systems, set Additional Windows Troubleshooting ToolsIPsec Parameters on Windows and HP-UX Comparing HP-UX and Windows IPsec Configuration ParametersValues page 42 for Mirrored FiltersHP-UX IKE SA Lifetime Values Filter SelectionIKE Parameter Selection IKE SA Key Master Key Lifetime ValuesWindows IKE SA Lifetime Values Maximum Quick ModesPerfect Forward Secrecy PFS IPsec SA Key Session Key Lifetime ValuesWindows IPsec SA Lifetime Values Related Publications Page Glossary Transform
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UX IPSec Software specifications

HP-UX IPSec Software is an integral component of the HP-UX operating system, providing robust and secure communication capabilities for enterprise environments. As organizations increasingly rely on secure networking solutions, HP-UX IPSec stands out with its comprehensive set of features and technologies designed to safeguard sensitive data.

One of the core characteristics of HP-UX IPSec Software is its implementation of the Internet Protocol Security (IPSec) framework. This technology secures Internet Protocol (IP) communications through authentication and encryption, ensuring the integrity and confidentiality of data transmissions. By leveraging IPSec, HP-UX provides a secure method for connecting remote users and secure sites over untrusted networks, such as the internet.

A notable feature of the HP-UX IPSec Software is its support for both transport and tunnel modes. The transport mode encrypts only the payload of the IP packet, whereas the tunnel mode encapsulates the entire IP packet within a new packet, allowing for secure communications between entire networks. This flexibility enables organizations to tailor their security strategies based on specific use cases and requirements.

HP-UX IPSec also emphasizes interoperability and compliance with industry standards. The software supports various encryption algorithms and authentication methods, including those defined by the Internet Engineering Task Force (IETF). This commitment to open standards ensures that HP-UX can seamlessly integrate with a diverse range of networking infrastructures and security solutions.

In addition to its security features, HP-UX IPSec Software offers administration tools that simplify the configuration and management of IPSec policies. The software includes a user-friendly command-line interface, allowing system administrators to specify security associations and policies efficiently. Moreover, comprehensive logging and monitoring capabilities help organizations keep track of their security posture and detect potential vulnerabilities.

Another essential characteristic of HP-UX IPSec Software is its scalability. Designed to accommodate the needs of both small and large enterprises, it can handle increased loads and adapt to changing security demands without compromising performance.

In conclusion, HP-UX IPSec Software stands as a vital solution for organizations seeking to protect their data transmissions over IP networks. With its core technologies, such as transport and tunnel modes, adherence to industry standards, user-friendly administration tools, and scalability, it provides a formidable layer of security in an increasingly interconnected world. This makes it a preferred choice for enterprises aiming to enhance their network security frameworks.
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