How to Configure IKEv2 VPN for macOS 15 on old USG/ZyWALL series?

Zyxel_Emily

Question:
What are the settings for configuring IKEv2 VPN on macOS 15 (Sequoia) using Zyxel USG40 and other USG/ZyWALL using firmware 4.73 patch 2?

Answer:
To set up IKEv2 VPN for macOS 15 (Sequoia) with the Zyxel USG40 and other USG/ZyWALL devices, use the following configurations:

Phase 1 (Gateway)
Encryption Algorithm: AES256
Authentication Algorithm: SHA256
Key Exchange: DH19
Phase 2 (Connection)
Encryption Algorithm: AES256
Authentication Algorithm: SHA256
Perfect Forward Secrecy (PFS): None

These settings ensure a stable and secure IKEv2 VPN connection for macOS 15 users.