Troubleshooting Tip: Error 'ERR_CONNECTION_REFUSED...

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.

Article Id 256100

Description

This article explains how to resolve 'ERR_CONNECTION_REFUSED' errors when FortiGate cannot be accessed via the GUI or web browser.

Scope

FortiGate v6.2.x and upper.

Solution

The problem usually arises after a firmware upgrade:

Follow the steps below to fix the issue:

Verify the admin cert under global configuration:

show full sys global | grep admin-server-cert

For example:

show full sys global | grep admin-server-cert

set admin-server-cert "self-sign"

The output revealed a missing certificate, so add a certificate to fix the problem:

config sys global

set admin-server-cert Fortinet_Factory
end

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Troubleshooting Tip: Error 'ERR_CONNECTION_REFUSED' is received while attempting to access FortiGate via a GUI or web browser