Choose your VPN Accordingly

IPsec and OpenVPN still have specific "superpowers" that might make them better for your technical infrastructure.

Here is the breakdown of how they compare for your OPNsense/Proxmox lab:

1. WireGuard: The "Modern Speedster"

WireGuard is a lean, high-performance protocol that runs inside the Linux/BSD kernel.

• Pros: Extremely fast (lowest latency and highest throughput), connects almost instantly, and uses very little CPU. It’s perfect for mobile devices because it doesn't drain the battery.

• Cons: It uses UDP only, which can be blocked by restrictive firewalls (like at a hotel or office). It also lacks "dynamic" IP assignment features found in older protocols.

• Best For: Remote Access (Phone/Laptop to Home) and Site-to-Site tunnels between two OPNsense boxes.

2. IPsec: The "Corporate Standard"

IPsec is the veteran of the group, designed for high-security, hardware-accelerated environments.

• Pros: Built-in support on almost every device (iPhone, Android, Windows, Mac) without needing an extra app. If your NICs support AES-NI acceleration (which your HPE Gen10 Plus servers do), IPsec is incredibly efficient.

• Cons: Very complex to configure. If one "Phase 1" or "Phase 2" setting is off by a single digit, the whole thing fails silently.

• Best For: Connecting to a corporate office or creating a permanent, high-speed bridge between two data centers.

3. OpenVPN: The "Swiss Army Knife"

OpenVPN is the most flexible and can "climb" through almost any network restriction.

• Pros: Can run on TCP Port 443, making it look like standard web traffic. This allows it to bypass almost any firewall. It is highly mature and supports complex multi-factor authentication (MFA) natively.

• Cons: The slowest of the three. Because it runs in "User Space" (not the kernel), it has high overhead and can struggle to hit Gigabit speeds.

• Best For: Bypassing censorship or connecting from highly restricted networks where UDP is blocked.

Comparison Table