PLANET CS-2001 - Manual (Page 369)

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Step 6. Under the IPSec Algorithm section, select Use both algorithms. Select
3DES for Encryption Algorithm and then select MD5 for Authentication
Algorithm. （Figure 11-226）
Figure 11-226 Configuring the IPSec Algorithm
Step 7. Under the Advanced Settings (optional) section, select GROUP 1 for PFS
Key Group, enter 3600 in the ISAKMP SA Lifetime field, enter 28800 in
the IPSec SA Lifetime field and then select Main mode for Mode. （Figure
11-227）
Figure 11-227 Configuring the PFS Key Group, ISAKMP SA Lifetime, IPSec SA Lifetime and
Mode
Step 8. Setting completed.
（Figure 11-228）
Figure 11-228 IPSec Setting Completed