Cisco DPQ2425 User Manual page 68

How Do I Configure My Wireless Residential Gateway with Digital Voice Adapter?
Field
Phase 1 encryption
Phase 1 authentication Allows you to select an authentication type for another level of security. Select
Phase 1 SA lifetime
Phase 2 encryption
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Description
Allows you to select the form of encryption to secure the VPN connection
between endpoints. Select from the following five encryption types:
DES
3DES
AES-128
AES-192
AES-256
You may choose any encryption type as long as the other end of the VPN
tunnel uses the same method
one of the following authentication types:
MD5
SHA
You may choose either authentication type as long as the other end of the VPN
tunnel uses the same method
Note: SHA is recommended because it is more secure.
Allows you to enter the number of seconds for an individual rotating key to
last until a re-key negotiation between each endpoint occurs. Smaller lifetimes
are generally more secure since it would give a hacker a smaller amount of
time to try to crack the key. However, key negotiation does take up bandwidth,
so network throughput is sacrificed with small lifetimes. The default setting is
28,800 seconds.
Allows you to select the form of encryption to secure the VPN connection
between endpoints. Select from the following five encryption types:
DES
3DES
AES-128
AES-192
AES-256
You may select any form of encryption as long as long as the other end of the
VPN tunnel uses the same method
Note: 3DES encryption is commonly used, but AES is recommended because it
is very difficult to crack
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