Refer to the exhibit.
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A network administrator is troubleshooting an IPsec tunnel between two FortiGate devices.
The administrator has determined that phase 1 status is up. but phase 2 fails to come up.
Based on the phase 2 configuration shown in the exhibit, what configuration change will bring phase 2 up?
A. On HQ-FortiGate, enable Auto-negotiate.
B. On Remote-FortiGate, set Seconds to 43200.
C. On HQ-FortiGate, enable Diffie-Hellman Group 2.
D. On HQ-FortiGate, set Encryption to AES256.
Explanation:
Reference: https://docs.fortinet.com/document/fortigate/5.4.0/cookbook/168495
Explanation:
Encryption and authentication algorithm needs to match in order for IPSEC be successfully established.