Tunnel and Interface Naming Conflict in FortiGate VPN Wizard

Question

Hi everyone,I’ve encountered a confusing situation when creating IPSec tunnels on FortiGate (version 7.4.8). If I create a loopback interface and then try to create a tunnel interface with the same name (e.g., “TUN-1”), I get a duplicate object or conflict error, which makes sense.But, if I use the tunnel creation wizard and select “Create” in the interface selector, it sometimes allows me to create a loopback interface and a tunnel-interface with the same name in a single step. I think this might be a validation issue or a bug. According to Fortinet docs and best practices, each interface must have a unique name.Is this a known issue with the wizard?Could future firmware updates break these configurations with duplicate names?

HarryTran · Answer

Hi @ik9  Thanks for your info. "it sometimes allows me to create a loopback interface and a tunnel-interface with the same name in a single step" Could you share a bit more about when it happens?Like:   Which FortiGate model and FortiOS version you’re using.  And if you’re working inside a VDOM.  Normally, interface names should be unique, so if both loopback and tunnel share the same name. Would love to see more info, so I can try to reproduce it!

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