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Device Management
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using a 128/192/256-bit key.
Parameter
Description
Integrity
Verification
Algorithm
Select a verification algorithm applied to an IKE session.
The router supports the following verification algorithms:
MD5 (Message Digest Algorithm): Generate a 128-bit message digest for a message to
prevent this message from being falsified.
SHA1 (Secure Hash Algorithm): Generate a 160-bit message digest for a message. It is
more difficult to crack SHA1than to crack MD5.
Diffie-Hellman
Group
Diffie-Hellman algorithm group information that is used to generate a session key to encrypt
an IKE tunnel.
Key Life Cycle
IPSec SA survival time.
PFS
The PFS (Perfect Forward Secrecy) feature enables IKE Stage 2 negotiation to generate a new
key material that has no association with any key material generated in Stage 1 negotiation.
Therefore, the Stage 2 key is safe even if the IKE1 Stage 1 key is cracked. If PFS is not used,
the Stage 2 key will be generated according to the key material generated in Stage 1. Once
the Stage 1 key is cracked, the Stage 2 key used to protect communication data will also be
placed in jeopardy. This will seriously threaten communication security of both parties.
Key Negotiation Custom
When key negotiation is Custom, the page is shown in the figure below.
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