Digi X2 - Manual (Page 116)

C o n f i g u r a t i o n t h r o u g h t h e w e b i n t e r f a c e
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Use the following pre-shared key to negotiate IKE security settings: The
Pre-Shared Key (PSK) specifies the shared key used to secure the VPN tunnel.
The key may be specified as an ASCII value using alpha-numeric characters or
may be specified as a hexadecimal value prefixed by “0x”. The key may be
specified as either a 128-bit key, 192-bit key, or 256-bit key. The corresponding
key lengths in ASCII and Hexadecimal values are:
Use the following policies to negotiate security settings: Security policies
define the set of security settings for incoming and outgoing traffic used to
encrypt and authorize data. One or more sets of settings may be specified. The
actual set of negotiated settings depends on the available policies specified by
the remote VPN endpoint.
– To add a new set of security policies, enter the encryption and authentication
algorithms for both incoming and outgoing traffic and click Add. When you
finish adding the new policies, click Apply.
– To modify an existing set of security policies, click any of the corresponding
links for the specified policy. When you finish changing the policies, click
Apply.
– To remove an existing set of security policies, click the Remove link for the
specified policy. Then click Apply.
Size Key Length
ASCII Hexadecimal
128-bit 16 32
192-bit 24 48
256-bit 32 64