PLANET CS-2001 - Manual (Page 374)

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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 11-240）
Figure 11-240 Configuring the IPSec Algorithm
Step 7. Under the Advanced Settings (optional) section, select GROUP 1 from the
PFS Key Group drop-down list. Enter 3600 in the ISAKMP SA Lifetime
field and then enter 28800 in the IPSec SA Lifetime field. （Figure 11-241）
Figure 11-241 Configuring the PFS Key Group, ISAKMP SA Lifetime, IPSec SA Lifetime and
Mode
Step 8. Setting completed.
（Figure 11-242）
Figure 11-242 Setting Completed