An IKE session begins with the initiator sending a proposal or proposals to the responder. The proposals define what encryption and authentication protocols are acceptable, how long keys should remain active, and whether perfect forward secrecy should be enforced, for example. Multiple proposals can be sent in one offering. The first exchange between nodes establishes the basic security policy; the initiator proposes the encryption and authentication algorithms it is willing to use. The responder chooses the appropriate proposal (we'll assume a proposal is chosen) and sends it to the initiator. The next exchange passes Diffie-Hellman public keys and other data. All further negotiation is encrypted within the IKE SA. The third exchange authenticates the ISAKMP session. Once the IKE SA is established, IPSec negotiation (Quick Mode) begins.
Aggressive Mode squeezes the IKE SA negotiation into three packets, with all data required for the SA passed by the initiator. The responder sends the proposal, key material and ID, and authenticates the session in the next packet. The initiator replies by authenticating the session. Negotiation is quicker, and the initiator and responder ID pass in the clear.
IPSec negotiation, or Quick Mode, is similar to an Aggressive Mode IKE negotiation, except negotiation must be protected within an IKE SA. Quick Mode negotiates the SA for the data encryption and manages the key exchange for that IPSec SA.
I am spinning up a new config and am running into issues. My physical config is Catalyst_9300 --> ASA_5516X --> ISR1108p. I am attempting to run the ASA in transparent mode, inspecting and passing the VLAN traffic between the switch and ...
hi, Does anybody knows what is the default WebUI (firepower chassis manager) idle timeout?Where i could change it? For FP7/8k series you could do that in system policy/ platform settings, but i cant see this option for FTD.
Hello.I have ASA5506-X with FTD image installed. I connected it to my smart account and now activate 3DES license (PAKs or Tokens->Get Licenses->Crypto,IPSec->Cisco ASA 3DES/AES License->[enter sn]->next).Then: Add new PAK->[fill PAK, pi...
A network contains a remote tunnel interface and firewalls in the network path of each router. An attempt to ping the IP address of the remote tunnel interface fails. Which connections should be allowed through the firewalls?A. IP protocol 50B. TCP port 1...