Fortinet VPN client guide for UK users

Introduction

Remote work has become a permanent fixture for many UK businesses, and with it comes the need for reliable, secure connections to corporate networks. The Fortinet VPN client is a popular choice among organisations that already use Fortinet firewalls or FortiGate appliances, offering a tightly integrated tunnel that authenticates users via the same security policies that protect the perimeter. For UK readers, understanding how this client fits into the broader landscape of data protection, ISP throttling and streaming rights is essential. This guide walks you through what the Fortinet VPN client is, how to install and configure it, and where it stands compared with other VPN services available through our VPN comparison tool.

What is the Fortinet VPN Client?

The Fortinet VPN client, often referred to as FortiClient, is a software application that creates an encrypted IPsec or SSL VPN tunnel between a user’s device and a Fortinet security gateway. Unlike consumer‑focused VPNs that route all traffic through third‑party servers, FortiClient is typically deployed to provide site‑to‑site or remote‑access connectivity for employees who need to reach internal resources such as file shares, internal web portals or specialised applications.

Because the client is managed centrally through FortiGate or FortiManager, IT teams can push configuration updates, enforce multi‑factor authentication (MFA) and apply endpoint security profiles (antivirus, web filtering, etc.) directly from the console. This centralised management is a key reason why many UK enterprises — particularly those in finance, healthcare and public sector — choose Fortinet over standalone VPN apps.

Key Features for UK Users

• Strong encryption: Uses AES‑256 for IPsec and TLS 1.2/1.3 for SSL VPN, meeting the encryption standards recommended by the UK’s National Cyber Security Centre (NCSC).
• Granular access control: Policies can be tied to user groups, device posture (e.g., antivirus up‑to‑date) and location, helping organisations satisfy UK GDPR accountability requirements.
• Split tunnelling: Administrators can define which traffic goes through the tunnel (e.g., corporate resources) and which uses the local ISP, reducing unnecessary latency for services like Netflix or BBC iPlayer.
• Endpoint compliance: FortiClient can check for disk encryption, OS patches and secure boot before allowing a connection, aligning with the ICO’s guidance on data security.
• Multi‑factor authentication: Supports RADIUS, LDAP, SAML and FortiToken, giving UK firms the flexibility to meet the strong customer authentication (SCA) elements of PSD2 where relevant.

Installing the Fortinet VPN Client on Windows and macOS

1. Obtain the installer – Your IT department should provide a signed MSI (Windows) or PKG (macOS) file via the internal software portal or email. Avoid downloading from unverified third‑party sites; malicious copies have been known to bundle adware.
2. Run the installer – Accept the licence agreement, choose the installation folder (default is fine) and allow the installer to add a firewall exception if prompted.
3. Initial launch – After installation, FortiClient will appear in the system tray (Windows) or menu bar (macOS). The first run may prompt you to import a configuration profile; this is usually supplied as a .conf file by your VPN administrator.
4. Log in – Enter your corporate username and password. If MFA is enabled, you will receive a push notification, SMS code or token prompt.
5. Verify the connection – Once connected, the client displays a green status indicator and shows the virtual IP address assigned by the FortiGate. You can test connectivity by pinging an internal server or accessing an internal SharePoint site.

Note: For macOS Ventura and later, you may need to grant “VPN” and “Network Extension” permissions in System Settings → Privacy & Security → Profiles.

Configuring the Client for Corporate Remote Work

UK organisations often need to balance security with usability. Here are typical configuration steps performed by the IT team, though end users can adjust certain preferences:

• Connection mode – Choose between IPsec (ideal for site‑to‑site) or SSL VPN (better for traversing restrictive ISP NAT or public Wi‑Fi). SSL VPN uses port 443, making it less likely to be blocked by hotel or café networks.
• Authentication method – Push‑based MFA via FortiToken Mobile is common in UK finance firms; alternatively, SMS OTP can be used where mobile signal is reliable.
• Endpoint security profile – Enable the built‑in antivirus, web filter and application control modules. These run locally and help prevent malware from entering the corporate network via the VPN tunnel.
• Split tunnelling rules – Define destination subnets (e.g., 10.0.0.0/16 for HQ, 192.168.100.0/24 for a regional office) that must go through the tunnel. All other traffic (including streaming services) uses the local ISP, preserving bandwidth for video calls.
• Logging and audit – FortiClient can upload connection logs to FortiAnalyzer or a SIEM. UK GDPR requires organisations to keep a record of processing activities; VPN logs can serve as evidence of who accessed what and when, provided they are retained only as long as necessary and protected against tampering.

Using the Fortinet VPN Client for Secure Streaming and Browsing

While the primary purpose of FortiClient is corporate access, many UK users wonder whether they can also use it for everyday browsing or streaming. The answer depends on the split‑tunnelling policy set by your administrator:

• If split tunnelling is disabled (i.e., all traffic forced through the tunnel), your internet traffic will exit via the corporate gateway. This can introduce latency, especially if the gateway is located far from your physical location, and may cause buffering on services like Netflix, Amazon Prime or BBC iPlayer. Some corporate policies also block known streaming domains to preserve bandwidth.
• If split tunnelling is enabled, you can enjoy normal ISP speeds for leisure activities while still benefitting from VPN protection for work‑related traffic. This setup is ideal for remote workers who need to attend a Teams call via the VPN but want to stream a football match in HD without interruption.

Remember that using a corporate VPN to bypass geographic licensing restrictions may violate the terms of service of the streaming provider and could be considered a breach of copyright law. VPN Download UK does not endorse copyright infringement; always respect the licensing agreements of content providers.

Privacy, Security and UK Regulatory Considerations

When deploying any VPN solution in the UK, several regulatory frameworks come into play:

• UK GDPR – Personal data transmitted over the VPN (e.g., employee emails, customer records) must be processed lawfully. FortiClient’s ability to enforce endpoint security and log connections helps organisations demonstrate appropriate technical measures under Article 32.
• ICO guidance – The Information Commissioner’s Office recommends that organisations use VPNs as part of a “defence in depth” strategy, ensuring that the VPN itself is regularly patched and that strong authentication is in place. Fortinet’s frequent firmware updates and vulnerability‑management programme align with this advice.
• ISP throttling – Some UK ISPs have been known to throttle VPN traffic during peak hours. Using SSL VPN (TCP 443) can mitigate this, as the traffic resembles ordinary HTTPS. If you notice consistent slowdowns, contact your ISP or consider a business‑grade line with a service‑level agreement (SLA) that guarantees VPN performance.
• Data retention – The Investigatory Powers Act 2016 (IPA) obliges communications providers to retain certain metadata for 12 months. While this applies to ISPs, not to end‑user VPN clients, organisations should be aware that any logs they retain may be subject to disclosure requests under the IPA.

Risks of Free VPN Alternatives

It can be tempting to download a free VPN app from an app store when you need a quick, private connection. However, free services often come with significant downsides that are especially relevant for UK users:

• Data harvesting – Many free VPNs log your browsing habits and sell the data to advertisers or data brokers, undermining the very privacy you seek.
• Weak encryption – Some free providers use outdated protocols (e.g., PPTP) or insufficient key lengths, making them vulnerable to interception.
• Malware injection – Investigations have found that certain free VPN clients bundle adware, trojans or even cryptocurrency miners.
• Unreliable performance – Free services often impose bandwidth caps, throttling or overcrowded servers, leading to poor video‑call quality and frequent disconnects.
• Legal exposure – If a free VPN is based in a jurisdiction with weak data‑protection laws, your data may be subject to foreign government access requests, which could conflict with UK GDPR obligations.

For these reasons, VPN Download UK advises against relying on free VPNs for any activity that involves personal data, corporate information or financial transactions. A reputable paid solution — whether FortiClient, a commercial VPN or a self‑hosted OpenVPN/WireGuard setup — offers stronger guarantees of privacy, security and support.

How Fortinet Compares to Other VPN Services

When evaluating VPN options for UK remote work, it helps to compare FortiClient against the typical consumer VPNs featured in our comparison hub. Below is a high‑level overview; for detailed side‑by‑side scores, visit the VPN comparison tool.

Feature	Fortinet VPN Client	Typical Consumer VPN
Primary use case	Corporate remote access, endpoint security	Privacy, geo‑unblocking, streaming
Management	Centralised via FortiGate/FortiManager	User‑managed via app or website
Encryption	AES‑256 IPsec/TLS 1.2‑1.3	Usually AES‑256 OpenVPN/WireGuard
Multi‑factor auth	RADIUS, LDAP, SAML, FortiToken	Often limited to email/SMS OTP
Endpoint security	Integrated AV, web filter, app control	Generally none (client only)
Split tunnelling	Granular, policy‑based	Simple app‑based or global toggle
Logging	Centralised, audit‑ready, GDPR‑friendly	Varies; many keep minimal logs
Cost	Included with Fortinet licence (per‑device or per‑user)	Subscription‑based (monthly/annual)

For organisations already invested in the Fortinet security fabric, the client offers seamless policy propagation and reduced administrative overhead. For smaller teams or freelancers who do not need endpoint protection, a reputable consumer VPN from our /compare page may be more cost‑effective and easier to deploy.

Conclusion

The Fortinet VPN client remains a robust solution for UK businesses that require secure, policy‑driven remote access to internal networks. Its strengths lie in tight integration with Fortinet security appliances, strong encryption, granular access controls and built‑in endpoint protections — features that help organisations satisfy UK GDPR, ICO recommendations and the practical demands of modern remote work.

When considering a VPN for personal use, remember that free services carry notable privacy and security risks, and that using any VPN to evade licensing restrictions may breach copyright law and provider terms. Always verify that your chosen solution aligns with both your organisational policies and the legal framework governing data protection in the UK.

For a broader look at how Fortinet stacks up against other options — whether you need an enterprise‑grade tunnel or a simple privacy tool — explore our VPN comparison tool.

Disclaimer: This article is editorial content. Readers should verify current laws, regulator guidance and the specific terms of any VPN provider before making decisions.