What is a Firewall?
A firewall is a network security system designed to monitor and control incoming and outgoing traffic based on predetermined security rules. Positioned between your internal network and external sources such as the internet, a firewall acts as a digital barrier that filters traffic to prevent unauthorised access. It can be hardware-based, software-based, or a combination of both, and it plays a vital role in any organisation’s IT infrastructure. By analysing data packets and enforcing security protocols, firewalls help ensure only trusted traffic is allowed through.
Speak to our cyber security specialists about how Firewall Shield can help your business.
How Can a Firewall Help Cyber Security?
Firewalls are a cornerstone of modern cyber security, providing frontline defence against cyber threats. They protect businesses from a wide range of malicious activities, including hacking attempts, malware, ransomware, and unauthorised data access. By defining and managing access policies, firewalls help ensure that only approved users and systems can connect to your network, reducing the risk of breaches and data loss.
For UK businesses, especially those operating in regulated industries or handling sensitive client data, firewalls are essential for maintaining compliance and safeguarding reputation. Advanced firewalls can also offer features like intrusion detection and prevention, traffic monitoring, and reporting tools – enabling IT teams to detect and respond to suspicious behaviour in real-time. In an age where cyber threats are increasingly sophisticated, a robust firewall is a critical component of any business’s security strategy.
Daisy Firewall Shield – Features and benefits
Purchasing Firewall Shield from Daisy Communications guarantees peace of mind with proactive protection for your business. During installation, a ‘trust nothing’ policy blocks all incoming traffic unless it’s been preapproved by you – any suspicious activity is immediately blocked and reported. As part of the Firewall Shield package you’ll also receive weekly software and security updates for known threats
Proactive protection
Firewall Shield uses IDS (Intrusion Detection System), IPS (Intrusion Protection System) and DPI (Deep Packet Inspection) to protect your business from online criminals.
Firewall Shield monitors and blocks:
- Malware – includes viruses, worms, trojans, spyware, and adware that infect systems through email attachments, malicious links, software downloads, network vulnerabilities, and removable media.
- Hacking Exploits – these leverage vulnerabilities to gain unauthorised access, often delivered via phishing emails or direct attacks.
- Hacking Shellcodes – this type of attack exploits hacking shellcode which is detected by security systems however, this type is malicious code used in cyber attacks to gain control of systems.
Looking for something more bespoke
Daisy Firewall Shield can operate a complex setup which can include extra features.
Speak to our team of experts today. They can offer all of the below extra features and more:
- Application blocking
- IP/location-based data blocking
- Report management
- Firewall rule management
FAQs
Firewall Shield is ideal for any business that handles sensitive data, operates online services, or simply wants to strengthen its cyber security posture. Whether you’re a small business looking to protect customer information or a larger enterprise managing multiple systems, Firewall Shield offers scalable protection to suit your needs.
Yes, Firewall Shield is well-suited for businesses with remote or hybrid teams. It provides consistent protection across your network, including remote endpoints, helping to secure users who access business systems from various locations or personal devices.
Firewall Shield is regularly updated with the latest threat intelligence and security signatures. This ensures it can detect and respond to emerging cyber threats as they evolve, giving your business continuous protection without the need for manual updates.
Firewall Shield is designed to offer high-performance protection without compromising your internet speed. It uses intelligent filtering and inspection techniques to minimise latency while maintaining robust security standards.
Absolutely. Firewall Shield can be configured with custom rules and policies based on your organisation’s risk profile, compliance requirements, and operational needs. Our team works with you to ensure the solution aligns with your security strategy.
An Intrusion Detection System (IDS) is a network security tool that monitors and analyses network traffic for signs of suspicious activity or known threats. It operates by comparing current activity against a database of known attack signatures or identifying unusual patterns of behaviour. When a potential threat is detected, the IDS generates alerts, allowing IT teams to investigate and take action. While it doesn’t block threats directly, IDS plays a crucial role in early threat detection and incident response.
An Intrusion Prevention System (IPS) builds on the capabilities of an IDS by not only detecting threats but also actively preventing them from reaching their target. It sits in-line with network traffic, meaning it can automatically block malicious activity in real-time based on predefined security rules. IPS can stop attacks such as buffer overflows, denial of service (DoS), and unauthorised access attempts before they cause damage, making it a vital tool for proactive threat mitigation.
Deep Packet Inspection (DPI) is an advanced method of analysing the data packets that travel across a network. Unlike basic packet filtering, which only checks headers, DPI examines the content of each packet in detail to identify and block harmful data, such as malware or unauthorised data transfers. This allows organisations to enforce granular security policies, detect sophisticated threats, and ensure that only legitimate traffic passes through the network. DPI is especially useful in defending against zero-day exploits and encrypted attacks.
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Why Daisy

Support
We pride ourselves on our friendly UK-based customer service.

Experience
From small beginnings, we’ve now got over 20 years experience.

Scale
We look after c. 175,000 businesses across the UK.