43. Select the security policy that was just created, right click, and then click [Assign].
IPsec settings on the computer are enabled.
• To disable the computer's IPsec settings, select the security policy, right click, and then click [Un-
assign].
• If you specify the "Authentication and High Level Encryption" security level in "Encryption Key Auto
Exchange Settings", also select the "Use session key perfect forward secrecy (PFS)" check box in
the filter action properties screen. If using PFS in Windows, the PFS group number used in phase 2
is automatically negotiated in phase 1 from the Diffie-Hellman group number (set in step 11).
Consequently, if you change the security level specified automatic settings on the machine and
"User Setting" appears, you must set the same the group number for "Phase 1 Diffie-Hellman
Group" and "Phase 2 PFS" on the machine to establish IPsec transmission.
Encryption Key Manual Settings Configuration Flow
CJD016
Activate IPsec settings Activate IPsec settings
Share IPsec SA items
Confirm IPsec transmission
Set IPsec SA using
Web Image Monitor
Set IPsec SA using
the IPsec setting tool
Decide IPsec SA items
• Before transmission, SA information is shared and specified by the sender and receiver. To prevent
SA information leakage, we recommend that this exchange is not performed over the network.
• After configuring IPsec, you can use "Ping" command to check if the connection is established
correctly. However, you cannot use "Ping" command when ICMP is excluded from IPsec
transmission. Also, because the response is slow during initial key exchange, it may take some time
to confirm that transmission has been established.
5. Enhanced Network Security
160
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