R211x-HP Flexfabric 11900 Security Configuration Guide

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PFS
The Perfect Forward Secrecy (PFS) feature is a security feature based on the DH algorithm. After PFS is
enabled, an additional DH exchange is performed in IKE phase 2 to make sure IPsec keys have no
derivative relations with IKE keys and a broken key brings no threats to other keys.
Protocols and standards
• RFC 2408, Internet Security Association and Key Management Protocol (ISAKMP)
• RFC 2409, The Internet Key Exchange (IKE)
• R F C 2412, The OAKLEY Key Determination Protocol
FIPS compliance
The device supports the FIPS mode that complies with NIST FIPS 140-2 requirements. Support for features,
commands, and parameters might differ in FIPS mode (see "Configuring FIPS") and non
-FIPS mode.
IKE configuration prerequisites
Determine the following parameters prior to IKE configuration:
• The algorithms to be used during IKE negotiation, including the identity authentication method,
encryption algorithm, authentication algorithm, and DH group.
{ Different algorithms provide different levels of protection. A stronger algorithm provides more
resistance to decryption but uses more resources.
{ A DH group that uses more bits provides higher security but needs more time for processing.
• The pre-shared key for IKE negotiation.
• The IKE-based IPsec policies for the communicating peers. If an IPsec policy does not reference any
IKE profile, the device selects an IKE profile for the IPsec policy. If no IKE profile is configured, the
globally configured IKE settings are used. For more information about IPsec, see "Configuring
IP
sec."
IKE configuration task list
Tasks at a glance Remarks
(Optional.) Configuring an IKE profile N/A
(Optional.) Configuring an IKE proposal
Required when the IKE profile needs to
reference IKE proposals.
(Optional.) Configuring an IKE keychain
Required when pre-shared authentication is
used in IKE negotiation phase 1.
(Optional.) Configuring the global identity information N/A
(Optional.) Configuring the IKE keepalive function N/A
(Optional.) Configuring the IKE NAT keepalive function N/A
(Optional.) Configuring IKE DPD N/A