If your encryption fails in Main Mode Packet 1, then you need to check your VPN communities.Ģ.
Packet 6 shows that the peer has agreed to the proposal and has authorised the host initiating the key exchange.ġ. The peers IP address shows in the ID field under MM packet 5. Packets 5 and 6 perform the authentication between the peers. The NONCE is a set of never before used random numbers sent to the other part, signed and returned to prove the parties identity. They perform key exchanges and include a large number called a NONCE. Packets 3 and 4 arent usually used when troublshooting. Packet 2 ( MM Packet 2 in the trace ) is from the responder to agree on one encryption and hash algorithm If your encryption fails in Main Mode Packet 1, then you need to check your VPN communities. You should then be able see the proposed Encryption Algorithm, Key Length, Hash Algorithm, Authentication Method, DH Group, and SA renegotiation params (life type - usually secs and duration). > "P1 Main Mode =>" for outgoing or "P1 Main Mode MM Packet 1 In IkeView under the IP address of the peer, open the Main Mode Packet 1 - expand : Each side generates a symmetric key (based upon the DH key and key material exchanged). The peers exchange DH Key material (random bits and mathematical data) and methods for PhaseII are agreed for encryption and integrity.ĥ. Each peer generates a shared secret from its private key and its peers public key, this is the DH key.Ĥ. Each peer generates a private Diffie-Hellman key from random bits and from that derives a DH public key. Peers Authenticate using Certificates or a pre-shared secret.Ģ. Creates a key to protect the messages of the exchange.ġ. Negotiates encryption methods (DES/3DES/AES etc) This file is open with wireshark or ethereal. Another tool is "vpn debug on mom" - it writes IKE captured data into file ikemonitor.snoop The $FWDIR/log/ike.elg file contains information once debugging is enabled.Ĭheckpoint has a tool IKEView.exe - it parse information of ike.elgĥ. Turn VPN Debug On - enter the command "vpn debug on vpn debug ikeon" or "vpn debug trunc". Can both sides see the IKE packets arriving during teh Key Exchange?Ĥ. VPN Debugging - Looking at the IKE negoatationsģ. Check if connectivity exist between the 2 Gateway peersĢ. Checkpoint-hyper-vpn-Upgrade PBR - Policy Base Routingġ.
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