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When IPsec VPN Refuses to Work: Fixing FortiClient IKEv2 the Clean Way (FortiOS 7.4)

When IPsec VPN Refuses to Work: Fixing FortiClient IKEv2 the Clean Way (FortiOS 7.4)

by Yasser Sanchez | Jan 8, 2026 | Cybersecurity, Infrastructure & Operations

There are days when VPNs remind you that they don’t care how confident you feel. This was one of those days. I was working on a remote-access IPsec VPN with FortiClient (IKEv2) on a FortiGate 100F running FortiOS 7.4.4. On paper, everything looked fine. Phase1 up....

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