Manual
– Encryption: The Encryption method determines the length of
the key used to encrypt/decrypt ESP packets. Note that both
sides must use the same method.
– Encryption Key: This field specifies a key used to encrypt
and decrypt IP traffic. Both character and hexadecimal values
are acceptable in this field. Note that both sides must use the
same Encryption Key.
– Authentication: The Authentication method authenticates
the Encapsulating Security Payload (ESP) packets. Select
MD5 or SHA. Note that both sides (VPN endpoints) must
use the same method.
MD5: A one-way hashing algorithm that produces a
128-bit digest
SHA: A one-way hashing algorithm that produces a
160-bit digest
– Authentication Key: This field specifies a key used to
authenticate IP traffic. Both character and hexadecimal
values are acceptable in this field. Note that both sides must
use the same Authentication Key.
– Inbound SPI/Outbound SPI: The Security Parameter Index
(SPI) is carried in the ESP header. This enables the receiver to
select the SA, under which a packet should be processed. The
SPI is a 32-bit value. Both decimal and hexadecimal values
are acceptable, e.g., "987654321" or "0x3ade68b1". Each tunnel
must have a unique Inbound SPI and Outbound SPI. No two
tunnels share the same SPI. Note that the Inbound SPI must
match the remote gateway's Outbound SPI, and vice versa.
