User manual

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Configure Digi devices
There are two groups of manual-keyed settings, for incoming and outgoing traffic, which
differ from each other, depending on the implementation of the remote VPN server.
 Incoming Traffic Security Settings: Incoming traffic is any traffic sent from a
remote peer on the remote network of the remote VPN endpoint to a local peer
on the local network.
 Outgoing Traffic Security Settings: Outgoing traffic is any traffic sent from a
local peer to a remote peer.
The settings for incoming and outgoing traffic are:
 SPI (Security Parameter Index): A unique index for a tunnel used to identify
the security settings for IPsec. The SPI is a 32-bit unsigned value that must not
be less than 256.
 Enable Encryption
Encryption algorithm
Encryption key: The optional encryption algorithm and associated encryption
key used to encrypt data on the VPN tunnel. To specify encryption, check
Enable Encryption and select the matching encryption algorithm. Enter the
encryption key according to the encryption algorithm.You can specify either an
ASCII value using alphanumerics or a hexadecimal value prefixed by 0x. The
encryption key length depends on the encryption algorithm:
Algorithm Size
Key Length
ASCII Hexadecimal
DES 64-bit 8 16
3 DES 192-bit 24 48
AES 128-bit 16 32