Planet MH-2300 User Manual page 184

Step 7. Select the radio box of "Use both algorithms" under the IPSec
Settings section, select "3DES" for Encryption Algorithm and select
"MD5" for Authentication Algorithm.
Step 8. In the Advanced Settings (optional) section, select "DH 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 IKE Negotiation.
Step 9. The IPSec autokey rule is successfully added.
The IPSec Algorithm Settings
The Advanced Settings
IPSec Autokey Rule Successfully Added
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Gigabit Multi-Homing VPN Security Gateway
MH-2300