HP ew2500 802.11b/g Print Server manual IKEv1/IKEv2 Phase 1 Authentication

Table 5-10Kerberos Settings page (continued)

Item	Description
Key Version Number	Version number for the encryption keys associated with the principal and password.
Clock Skew	Clock skew is a measure of allowed differences between clocks during transactions. A
	Kerberos installation uses clocks that are reasonably synchronized. When the
	HP Jetdirect print server checks time stamps of incoming packets from clients, the clock
	skew specifies the time interval (in seconds) within which the HP Jetdirect print server
	accepts a packet. If the time interval is exceeded, the packet is discarded.
	NOTE: Timing differences between the HP Jetdirect print server and a domain
	controller depends on the clock skew configuration on the domain controller.
Time Sync Period	Time interval (in minutes) that the HP Jetdirect print server requests to synchronize its
	clock with an SNTP time server.
SNTP Server	FQDN or IP address of an SNTP time server, if required. By default, the SNTP server is
	the server used as the KDC.

IKEv1/IKEv2 Phase 1 (Authentication)

Use IKE to create security associations dynamically. Configure SA parameters for authentication and to securely generate IPsec session keys for encryption and authentication algorithms. Items on this page are described in the following table.

Table 5-11IKEv1/IKEv2 Phase 1 (Authentication) page

Item	Description
Negotiation Mode	(Required) IKE provides two modes of negotiation during an exchange for keys and
	security services to be used for a Security Association:
	Main Uses identity protection between the hosts. This method is slower but secure.
	Aggressive Uses half the message exchanges. It is faster, but less secure.
Cryptographic Parameters	(Required) Diffie-Hellman Groups Allows a secret key and security services to be
	securely exchanged between two hosts over an unprotected network. A Diffie-Hellman
	group determines the parameters to use during a Diffie-Hellman exchange. Multiple
	well-known Diffie-Hellman groups are listed.
	IKEv1 supports up to DH-18.
	IKEv2 supports up to DH-24.
	To change the entries in the list, click Edit. Selecting all the groups results in a single
	negotiated group.
Encryption and Authentication	(Required) Encryption methods and strengths, and the authentication methods to use.
	Selecting all the methods results in a single negotiated method.
Security Association	(Required) Specify the SA Lifetime, in seconds (30 to 86400), that the keys
	associated with this security association are valid.

IKEv1/IKEv2 Phase 2 / Quick Mode (IPsec Protocols)

Items on this page are described in the following table.

HP Jetdirect IPsec/Firewall wizard 117