What does not need to match are the SA lifetime in seconds and traffic volume. There must be a match for the Encapsulation Protocol, Encryption, Hashing and Tunnel mode. #Ikev2 name mangler how to#The things that need to match are what to protect (proxy-ACL/encryption domain) and how to protect it (transform-set). These keys are used to encrypt data through the IPsec tunnel. Two additional keys are derived from Phase 1 keying material by default (unless PFS is enabled). Phase 2 concerns what to protect and how to protect it. All messages are encrypted using the encryption key derived from the Phase 1 exchange. * NAT Traversal - uses UDP encapsulation on port 4500 (versus 500) * PIC - Pre-IKE Credential Provisioning Protocol #Ikev2 name mangler crack#* CRACK - Challenge Response Authentication for Cryptographic Keys (yes, this is real and not a distractor) I have some notes about IKEv1 Extensions: Not easy to troubleshoot and will fail if all is not exactly correct. If you use this, you have to know and agree on settings in advance. Nothing is encrypted and identities are sent in the clear. The DH group cannot be negotiated and authentication with public key cryptography cannot be negotiated. Īggressive mode has limited SA negotiation capabilities. The blue is one direction and the green is the opposite direction. The diagram below represents these messages. Main mode uses 6 message types and Aggressive Mode uses 3 message types. For rsa-sig, perform PKI enrollment, create tunnel-group/connection profile and bind the certificate. For psk, create tunnel-group/connection profile and specify the pre-shared key. Also, for ASA you must configure ISAKMP policies - it has no default policy (IOS has a default policy). For ASA you must enable ISAKMP on the interface where the crypto map will be applied. I have some notes about ASA vs IOS regarding ISAKMP. Negotiated Parameters that need to match: I guess one way to remember the order is EHADS - which is similar to EGADS (expression of surprise that this is on the test). Specify the Diffie-Helman group identifier. Specify the authentication method.Ĭrypto isakmp policy 10 authentication pre-share Specify the encryption algorithm.Ĭrypto isakmp policy 10 encryption aes-192 Since I have configured this in production and have familiarity with it, I am going to list the steps and an example (versus all the possible values). There are 5 steps to create an ISAKMP Policy (this could be a drag-and-drop question). Phase 2 creates the tunnel that protects data. ISAKMP Phase 1 creates the first tunnel - which protects ISAKMP negotiation messages. ISAKMP is a part of IKE, and is also the keyword used to configure IPsec. This is not exactly true, but is close enough for the most part. Cisco's document on Configuring IPsec and ISAKMP seems to equate IKE and ISAKMP. ISAKMP stands for Internet Security Association and Key Management Protocol.
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