FortiGate
FortiGate Next Generation Firewall utilizes purpose-built security processors and threat intelligence security services from FortiGuard labs to deliver top-rated protection and high performance, including encrypted traffic.
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Staff
Description
This article describes how the parameter 'set ike-port' under config system settings works in FortiOS 7.0.
Solution
The behavior for set ike-port was changed with FortiOS 7.0.

Use the following commands:

# config system settings
    set ike-port (Custom port, 4500 or 500 (default))
end

FortiGate will handle the incoming IKE request as follows:

set ike-port X <----- Custom port example.

- Server listens on port X and port 4500.
- Initiator starts on port X.

set ike-port 500 <----- Default setting.

- Server listens on port 500 and 4500.
- Initiator starts on port 500.

set ike-port 4500

- Server listens on port 500 and 4500.
- Initiator starts on port 4500.


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