AirLive RS-2000 - Manual (Page 260)

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STEP 5﹒ Select Aggressive Mode Algorithm in Encapsulation. When setup connection,
it will choose the Algorithm as 3DES ENC Algorithm, MD5 AUTH Algorithm,
and GROUP2 automatically.
My ID/ Peer ID can choose to enter nothing; or enter different IP Address if you
are willing to input. For example: 11.11.11.11, 22.22.22.22. If you are going to
input numbers or alphabets for detection, add @ in the front. For example: @123A,
@Abcd1.
STEP 6﹒Select Data Encryption+Authentication in IPSec Algorithm. You can
choose Data Encryption+Authentication or Authentication Only to
communicate:
ENC Algorithm: 3DES/DES/AES/NULL
AUTH Algorithm: MD5/SHA1
Here we select 3DES for ENC Algorithm and MD5 for AUTH Algorithm to
make sure the encryption way for connection.