D-Link NetDefendOS - Page 768

Payload data length : 16 bytes
NAT-D (NAT Detection)
Payload data length : 16 bytes
NAT-D (NAT Detection)
Payload data length : 16 bytes
Step 5. Client Sends Identification
The initiator sends the identification which is normally an IP address or the Subject Alternative
Name if certificates are used.
Received IKE packet from 192.168.0.10:500 Exchange type :
Identity Protection (main mode) ISAKMP Version : 1.0
Flags : E (encryption)
Cookies : 0x6098238b67d97ea6 -> 0x5e347cb76e95a
Message ID : 0x00000000
Packet length : 72 bytes
# payloads : 3
Payloads:
ID (Identification)
Payload data length : 8 bytes
ID : ipv4(any:0,[0..3]=192.168.0.10)
HASH (Hash)
Payload data length : 16 bytes
N (Notification)
Payload data length : 8 bytes
Protocol ID : ISAKMP
Notification : Initial contact
Explanation of Above Values
Flags: E means encryption (it is the only flag used).
ID: Identification of the client
The Notification field is given as Initial Contact to indicate this is not a re-key.
Step 6. Server ID Response
The server now responds with its own ID.
Sending IKE packet to 192.168.0.10:500 Exchange type :
Identity Protection (main mode) ISAKMP Version : 1.0
Flags : E (encryption)
Cookies : 0x6098238b67d97ea6 -> 0x5e347cb76e95a
Message ID : 0x00000000
Packet length : 60 bytes
# payloads : 2
Payloads:
ID (Identification)
Payload data length : 8 bytes
ID : ipv4(any:0,[0..3]=192.168.10.20)
HASH (Hash)
Payload data length : 16 bytes
Step 7. Client Sends a List of Supported IPsec Algorithms
Chapter 9: VPN
768