NETGEAR UTM5-100NAS, UTM50-100NAS manual Auto Policy Parameters

ProSecure Unified Threat Management (UTM) Appliance Reference Manual

Table 7-12. Add VPN Policy Settings (continued)

Item	Description (or Subfield and Description)
Integrity Algorithm	From the pull-down menu, select one of the following two algorithms to be
	used in the VPN header for the authentication process:
	• SHA-1. Hash algorithm that produces a 160-bit digest. This is the default
	setting.
	• MD5. Hash algorithm that produces a 128-bit digest.
Key-In	The integrity key for the inbound policy. The length of the key depends on
	the selected integrity algorithm:
	• MD5: enter 16 characters.
	• SHA-1: enter 20 characters.
Key-Out	The integrity key for he outbound policy. The length of the key depends on
	the selected integrity algorithm. The required key lengths are the same as
	for the Key-In (se above).

Auto Policy Parameters

Note: These fields apply only when you select Auto Policy as the policy type.

SA Lifetime	The lifetime of the Security Association (SA) is the period or the amount of
	transmitted data after which the SA becomes invalid and must be
	renegotiated. From the pull-down menu, select how the SA lifetime is
	specified:
	• Seconds. In the SA Lifetime field, enter a period in seconds. The minimum
	value is 300 seconds. The default value is 3600 seconds.
	• KBytes. In the SA Lifetime field, enter a number of kilobytes. The
	minimum value is 1920000 KB.
Encryption Algorithm	From the pull-down menu, select one of the following five algorithms to
	negotiate the security association (SA):
	• DES. Data Encryption Standard (DES)
	• 3DES. Triple DES. This is the default algorithm.
	• AES-128. Advanced Encryption Standard (AES) with a 128-bits key size.
	• AES-192. AES with a 192-bits key size.
	• AES-256. AES with a 256-bits key size.
Integrity Algorithm	From the pull-down menu, select one of the following two algorithms to be
	used in the VPN header for the authentication process:
	• SHA-1. Hash algorithm that produces a 160-bit digest. This is the default
	setting.
	• MD5. Hash algorithm that produces a 128-bit digest.

Virtual Private Networking Using IPsec Connections 7-37

v1.0, January 2010