You are a network security engineer tasked with establishing a secure Site-to-Site IPsec VPN tunnel between the company's headquarters and a new branch office. The connection must use the strongest available cryptographic algorithms to protect sensitive corporate data transmitted between locations.
Network Details:
- HQ Gateway: 198.51.100.10
- Branch Gateway: 203.0.113.50
- Internal HQ Network: 10.10.0.0/16
- Internal Branch Network: 10.20.0.0/16
Security Requirements:
- Use strongest encryption standard
- Use strongest hashing algorithm
- Use strongest Diffie-Hellman group for key exchange
- Use protocol that provides both confidentiality and authentication
The VPN concentrator will reject any insecure cryptographic proposals and only accept configurations that meet current security best practices (as of 2024).
Configure the VPN tunnel by selecting the appropriate cryptographic parameters. The tunnel will only establish if all four parameters meet current security standards.
VPN Tunnel Configuration
Configure Phase 1 (IKE) and Phase 2 (IPsec) parameters