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.
IkeSnoop: 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
Now the client sends the list of supported IPsec algorithms to the server. It will also contain the
proposed host/networks that are allowed in the tunnel.
IkeSnoop: Received IKE packet from 192.168.0.10:500 Exchange type :
Quick mode ISAKMP Version : 1.0
Flags : E (encryption)
Cookies : 0x6098238b67d97ea6 -> 0x5e347cb76e95a
Message ID : 0xaa71428f
Packet length : 264 bytes
# payloads : 5
Payloads:
HASH (Hash)
Payload data length : 16 bytes
SA (Security Association)
Payload data length : 164 bytes
DOI : 1 (IPsec DOI)
Proposal 1/1
Protocol 1/1
Protocol ID : ESP
SPI Size : 4
SPI Value : 0x4c83cad2
Transform 1/4
Transform ID : Rijndael (aes)
Key length : 128
Authentication algorithm : HMAC-MD5
SA life type : Seconds
SA life duration : 21600
SA life type : Kilobytes
SA life duration : 50000
Encapsulation mode : Tunnel
Transform 2/4
9.4.5. Troubleshooting with ikesnoop Chapter 9. VPN
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