The IPSec Crypto profile defines the set of security protocols and algorithms used to protect data traffic in an IPSec VPN tunnel, which corresponds to Phase 2 of the IKE/IPSec negotiation. This profile includes parameters such as the protocol (ESP or AH), encryption and authentication algorithms, Diffie-Hellman (DH) group for Perfect Forward Secrecy (PFS), and the Security Association (SA) lifetime. A mismatch in the Phase 2 lifetime between peers is a common cause of tunnel negotiation failure, and this value is configured directly within the IPSec Crypto profile on a Palo Alto Networks firewall.

A. IPSec Tunnel settings: This configuration object binds the IKE Gateway and IPSec Crypto profile to a tunnel interface but does not contain the lifetime parameter itself.

B. IKE Crypto profile: This profile defines the parameters for IKE Phase 1, such as the IKE SA lifetime, not the IPSec SA (Phase 2) lifetime.

D. IKE Gateway profile: This defines the peer's identity and connection parameters for establishing Phase 1, linking to the IKE Crypto profile, not Phase 2 settings.

1. Palo Alto Networks PAN-OS® Administrator’s Guide 10.2: In the section describing how to set up an IPSec VPN

the configuration of the IPSec Crypto profile is detailed. It explicitly lists "Lifetime" as a configurable parameter for the Phase 2 Security Association.

Reference: Network > Network Profiles > IPSec Crypto > Add IPSec Crypto Profile. The dialog box shows fields for "IPSec Protocol

" "Encryption

" "Authentication

" "DH Group

" and "Lifetime." This directly confirms the lifetime is a Phase 2 parameter set in this profile.

2. Palo Alto Networks PAN-OS® Administrator’s Guide 10.2: The guide explains the role of each component in an IPSec VPN. It differentiates the IKE Crypto profile (Phase 1) from the IPSec Crypto profile (Phase 2).

Reference: Section "Set Up an IPSec VPN

" Step 5: "Add an IPSec Crypto profile to specify the protocols and algorithms for authenticating and encrypting traffic in the IPSec security association (Phase 2)."

3. Palo Alto Networks PAN-OS® Administrator’s Guide 10.2: The guide clarifies the function of the IKE Crypto profile

confirming it is for Phase 1.

Reference: Section "Set Up an IPSec VPN

" Step 4: "Add an IKE Crypto profile to specify the protocols and algorithms for authentication

encryption

and key exchange in the IKE security association (Phase 1)."