ZyXEL Communications P-660HN-F1, User Manual

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Chapter 16 VPN
ADSL Series User’s Guide
210
16.4 Configuring Advanced Settings
Click Advanced Setup in the VPN Setup-Edit screen to open this screen.
Figure 108
Security > VPN > Setup > Edit > Advanced Setup
The following table describes the fields in this screen.
Advanced Setup Click Advanced Setup to configure more detailed settings of your IKE key
management.
Apply Click Apply to save your changes back to the ZyXEL Device.
Back Click Back to return to the previous screen.
Table 63
Security > VPN > Setup > Edit
LABEL DESCRIPTION
Table 64
Security > VPN > Setup > Edit > Advanced Setup
LABEL DESCRIPTION
Advanced Setup
Phase 1
Encryption
Algorithm Select 3DES, AES128 or AES256 from the drop-down list box.
When you use one of these encryption algorithms for data communications, both the
sending device and the receiving device must use the same secret key, which can be
used to encrypt and decrypt the message or to generate and verify a message
authentication code. The DES encryption algorithm uses a 56-bit key. Triple DES
(3DES) is a variation on DES that uses a 168-bit key. As a result, 3DES is more secure
than DES. It also requires more processing power, resulting in increased latency and
decreased throughput.
This implementation of AES uses a 128-bit key and a 256-bit key. AES is faster than
3DES.