IKEv1 Phase 2 / Quick Mode (IPsec Protocols)
Items on this page are described below.
Table 5-12 IKEv1 Phase 2 / Quick Mode Settings (IPsec Protocols) page
Item Description
Encapsulation Type Specify how the IPsec protocols selected (ESP or AH) will be encapsulated:
●
Transport (default): Only the user data in each IP packet is protected, the IP
packet header is not protected.
●
Tunnel: All packet fields are protected, including the IP packet header.
Cryptographic Parameters Select the encryption methods and strengths, and the authentication methods to be
used
●
ESP: Use IPsec Encapsulating Security Payload (ESP) protocol for IP packets.
ESP headers are inserted in packets to ensure privacy and integrity of packet
contents. Select among the supported encryption methods/strengths and
authentication methods to be used for data protection.
●
AH: Use IPsec Authentication Header (AH) protocol for IP packets. AH headers
are inserted in packets to protect integrity of packet contents through cryptographic
checksums. Select among the supported authentication methods.
CAUTION: The use of IPsec AH may not function properly in
environments that use Network Address Translation (NAT).
NOTE: ESP authentication cannot be used if AH is enabled. If you enable
ESP and AH, you must select AH authentication methods.
Security Association SA Lifetime: Specify the Security Association lifetime, either in seconds, in the number
of kilobytes (KB), or both. Within the limits specified, shorter lifetimes will provide
improved security depending on the frequency of SA use.
Use “0” to disable.
Advanced IKE Settings button Click this button to configure advanced IKE settings.
Advanced IKE Settings
The Advanced IKE Settings page contains the configuration settings described below.
Table 5-13 Advanced IKE Settings page
Item Description
Replay Detection IPsec protocols support anti-replay services that prevent message interception for later
use (for example, to gain access to resources). Enable or disable the IPsec anti-replay
algorithm.
Key Perfect Forward Secrecy
(Session PFS)
When secret keys are periodically replaced, Perfect Forward Secrecy (PFS) indicates
that the new keys are independently derived and unrelated to the prior keys. This helps
to ensure that data protected by the new keys is secure. While PFS provides additional
security, it requires additional processing overhead.
Enable or disable Session PFS for key protection as desired.
Diffie-Hellman Groups: (For Session PFS only) Multiple well-known Diffie-Hellman
groups that will be used are listed. To change the entries in the list, click Edit.
110 Chapter 5 IPsec/Firewall Configuration (V.36.xx) ENWW
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