Zoom 4420-A - Manual (Page 61)

Chapter 7. VPN Settings 61
If you select Manual , the following options appear:
Parameter Select or enter . . .
ESP
(Encapsulating
S
ecurity Payload)
Select an encryption algorithm:
3DES (a mode of the Data Encryption
S tandard algorithm that encrypts data three
times)
AES 128
(128-bit Advanced Encryption
S tandard)
NULL – no encryption
Select an authentication algorithm:
MD5 (A digital signature algorithm)
SHA1 (Secure Hash Algorithm)
SPI (Security
P arameters Index)
The Security Parameters Index is a random
value added to the packet header in Ipsec-
protected traffic. The SPI serves as an index to
a table of security parameters such as hash
algorithm, secret data, and many other
parameters.
Enter a numeric or hex value 100-FFF.
Encryption Key Enter an encryption key.
Authentication
Key Enter an authentication key.
Apply Changes Click this button to save your entries.
Reset Click to restore the VPN Client defaults.
Refresh Click to update the connection status.
Back Click to return to the main VPN Setup page.