PLANET CS-2001 - Manual (Page 263)

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Step 4. Select “Pre-Shared Key” for Authentication Method, and enter a
Pre-Shared Key String. (The maximum length of Pre-Shared Key String is
103 characters.) （Figure 11-21）
Figure 11-21 Authentication Method Settings
Step 5. Below Encryption and Data Integrity Algorithms, select “3DES” for
Encryption Algorithm; select “MD5” for Authentication Algorithm;
select “Group 1” for Group. （Figure 11-22）
Figure 11-22 Encryption and Data Integrity Algorithms Settings
Step 6. Select Use both algorithms below the IPSec Algorithm, or tick Use
authentication algorithm only. If ticked Use both algorithms, please
select “3DES” for Encryption Algorithm and “MD5” for Authentication
Algorithm. （Figure 11-23）
Figure 11-23 IPSec Algorithm Settings
Step 7. Select “Group 1” for PFS Key Group. Enter “3600” in the ISAKMP SA
Lifetime field and “28800” in the IPSec SA Lifetime field and then select
“Main Mode” for Mode. （Figure 11-24）
Figure 11-24 Advanced Settings of IPSec Autokey