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Key Considerations in Using a Web Application Firewall

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Anton Jacobsz, managing director at Networks Unlimited
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Cyber security specialists are realising more and more the growing danger of application layer threats to a network.

While there is no denying the need to remain aware of distributed denial of service (DDoS) attacks, application layer attacks are very difficult to detect and provide little or no advanced warning before attacking your applications.

This is according to Simon McCullough, major channel account manager at F5, the specialist in application delivery networking and technology for the delivery of web applications, as well as security and network and cloud resources.

McCullough said, “Administrators and security teams are finding it increasingly difficult to keep up-to-date with the latest attacks and protection measures. Applications are the gateway to data and data is what hackers are after. In an attack on applications, traditional network firewalls are not a defence. Here, you need a web application firewall (WAF).

“As we become increasingly aware of the dangers posed by application layer threats, it is useful to revisit the F5 White Paper, ‘Key Considerations in Choosing a Web Application Firewall’, which notes that a robust WAF is a requirement of network security. This has come about in a cyber landscape in which enterprises are extending their businesses by using more web-based and cloud-hosted applications, which in turn are inviting increasingly sophisticated attacks that threaten enterprise data.”

McCullough said the White Paper offers a number of useful considerations in choosing your WAF.

He noted that the first consideration is the choice of WAF deployment model, which includes: hardware WAF appliance to protect critical applications maintained in a traditional data centre; deploying a WAF as a software-based virtual edition (VE), which is a cost-effective option for small-to-medium-size businesses or those wanting to deploy protections closer to the app; and cloud-based WAF (WAF-as-a-Service) to intercept web traffic before it enters the network or reaches the server in the cloud.

He said, “The White Paper distinguishes between initial basic considerations when deploying a WAF, and further advanced considerations.”

Basic considerations when deploying a WAF

Network architecture and application infrastructure
Web application firewalls are designed to watch and respond to HTTP/S traffic. They are most often deployed as appliances in the line of traffic between the requester and the application server, inspecting requests and responses before forwarding them. Inline deployments tend to be most effective in actively blocking malicious traffic based on policies and rules that must be applied judiciously to avoid dropping legitimate traffic. A WAF can also be deployed “out of band”, which allows the WAF to observe traffic from a monitoring port. This non-intrusive “passive” deployment option is ideal for testing the WAF without impacting on traffic, yet still enabling the WAF to block malicious requests.

Security effectiveness and detection techniques
Today’s leading WAFs employ a combination of techniques to ensure accurate detection coverage that does not block legitimate traffic.

Traditionally, the most widely used WAF configuration has been a negative security model, which allows all transactions except those that contain a threat/ attack.

In recent years, positive security models have become popular. This approach blocks all traffic, allowing only those transactions that are known to be valid and safe. The positive approach is based on strict content validation and statistical analysis.

An integrated positive and negative approach can also be implemented.

Performance, high availability and reliability
WAF capabilities should include these features:

  •        Caching copies of regularly requested web content to reduce repeated requests to back-end servers.
  •        Automatic content compression to provide for more efficient network transport.
  •        Hardware-based SSL acceleration to speed SSL processing and reduce the burden on back-end web servers.
  •        Load balancing web requests across multiple back-end web servers to optimise performance.
  •        Connection pooling to reduce back-end server TCP overhead by allowing multiple requests to use the same back-end connection.

Virtual patching and scanner integration
Although developers apply best practices in secure coding, and perform adequate security testing of applications, all applications are prone to vulnerabilities. Additional tools are needed to detect, validate and patch software exposures until a new application code is made available.

Virtual patching requires no immediate changes to the software, and it allows organisations to secure applications immediately upon dynamic application testing. Virtual patches are a key component of a strong WAF, often requiring integration with a vulnerability scanner.

PCI DSS compliance
Malicious attacks designed to steal sensitive credit card information are increasing, with more and more security breaches and data thefts occurring daily. The PCI DSS requirements have been revised in an attempt to prevent these types of attacks and keep customer data secure.

Protection against application attacks
With the continued growth of multi-layered attacks, IT managers need a strong WAF solution. A good WAF ensures application security and availability by providing comprehensive geolocation attack protection from layer 7 DDoS, SQL injection, Open Web Application Security Project (OWASP) Top Ten application security risks, cross-site scripting, and zero-day web application attacks. It also can prevent execution of fraudulent transactions, stop in-browser session hijacking, and secure AJAX applications and JSON payloads.

When evaluating a WAF, make sure you understand the full scope of protections it offers to ensure that your business receives the best coverage.

Data classification of protected applications
More and more attackers are encrypting their attacks, therefore your WAF solution needs to be able to understand the application and the data that it is protecting. If that data is encrypted, your WAF must be able to decrypt the information and then classify the data within the apps in order to provide additional protection. A strong WAF can terminate SSL traffic, expose what is inside it, and make security decisions based on the encrypted data.

Visibility and reporting
Reports provide visibility into attack and traffic trends, long-term data aggregation for forensics, acceleration of incident response, and identification of unanticipated threats before exposure occurs. Many WAFs also integrate with database security products to give administrators a real-time view into the operation of their websites, and provide reports on web-based attempts to gain access to sensitive data, subvert the database, or execute denial of service (DoS) attacks against the database.

Advanced considerations when deploying a WAF
McCullough notes further advanced considerations when deploying a WAF, as set out by the F5 White Paper, as follows:

  •        Automatic attack detection to identify more evasive bot sequences that may escape traditional detection methods, and identify unauthorised, automated attacks upon the first attempt to access an application.
  •        Device ID and fingerprinting in order to identify a client.
  •        SSL offload to other network resources, allowing applications to dedicate important CPU resources to other processing tasks, which can improve performance.
  •        Behavioural analysis to understand volumetric traffic patterns and scan for anomalous behavior, as well as assess average server response time, transactions per second, and sessions that request too much traffic – to use as a baseline for determining whether an attack has commenced.
  •        Security operations centre: A responsive security team should include experts who analyse threats and malware, and who reverse engineer code to uncover how attacks work and how to mitigate them. The WAF vendor should work with you to mitigate threats as they arise, as well as enhance your organisation’s own security practices.
  •        Anti-fraud capabilities: More advanced WAF solutions integrate with web fraud detection services to simplify deployment, streamline reporting, and strengthen the overall application security posture by thwarting requests from validated fraudsters.
  •        Ease of management: You should be able to deploy your WAF with security policies that immediately address common attacks on web applications, including HTTP(S) attacks.
  •        Scalability and performance: Organisations need to ensure application availability, even when under attack.
  •        Vendor release cycle: With the threat landscape changing so quickly, vendors that offer more frequent release can help decrease your window of exposure and reduce the risk of your applications becoming compromised by a new or emerging threat.

Anton Jacobsz, managing director at Networks Unlimited, a value-added distributor of F5 in Africa, concludes, “Application attacks have definitely been increasing over the past few years, due to the increasing proliferation of useful web apps which, concomitantly, increase a network’s vulnerability. Web application firewalls detect and block malicious attacks woven into safe-looking website traffic that may have slipped through the traditional security solutions, by examining incoming HTTP requests before they even reach the server.”
 


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Government, Industrial Sectors became the Primary Targets for Cybercriminals in 2025 – Report

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According to the global report by Kaspersky Security Services ‘Anatomy of a Cyber World’, the government sector has emerged as the most targeted sector for the second consecutive year, accounting for 19% of all high-severity incidents in 2025.

The industrial sector closely followed at 17%, while the IT sector rose to third place with 15%, displacing finance from the top three targeted industries.

The ‘Anatomy of a Cyber World’ is a comprehensive global report drawing on incident statistics from Kaspersky Managed Detection and Response, Kaspersky Incident Response, Kaspersky Compromise Assessment and Kaspersky SOC Consulting.

This report sheds light on the most prevalent attacker tactics, techniques and tools, as well as the characteristics of detected incidents and their distribution across regions and industry sectors.

Building on these findings, the report reveals that government bodies continued to be the most targeted sector in 2025. A deeper examination of the root causes of attacks within this sector uncovers that Advanced Persistent Threats (APTs) were the most common, accounting for 33,3% of incidents.

This trend highlights the increasing sophistication of adversaries who persistently evolve their tactics to bypass automated protection. Additionally, 18,9% of government organisations experienced social engineering attacks, underscoring that employees remain a critical entry point for cyber threats.

This dual vulnerability, from both advanced persistent attackers and social engineering campaigns, underscores the need to strengthen not only technology but also organisational resilience.

Implementing measures such as role-based access control and limiting privileges can significantly reduce the impact of compromised accounts, particularly in large, distributed government environments.

The industrial sector presents a different but equally concerning profile. Threats in industrial environments are distributed with striking uniformity: APT-driven incidents constitute 17,8%, malware 14,9% and social engineering 13,9%.

This pattern suggests that industrial organisations attract a broad range of adversaries with different capabilities and objectives, rather than being primarily targeted by a single type of threat actor. Notably, confirmed cyber exercises like red teaming accounts for 22,8% of incidents in the sector, the highest share among the top three industries, reflecting growing investment in proactive security validation among industrial organisations.

In contrast, the IT sector shows a markedly different pattern. With 41% of incidents attributed to human-driven APT attacks, the highest rate across all sectors, IT organisations are clearly a priority target for sophisticated threat actors seeking to exploit trusted relationships and scale their impact through supply chains.

APT traces, which are artifacts from previous advanced persistent threat activity, were identified in an additional 17% of cases, while social engineering accounted for 11%. In contrast, red teaming represents only 9% of IT incidents, suggesting that proactive security testing remains underutilised relative to the sector’s actual threat exposure.

Interestingly, the finance sector was displaced from the top three targeted industries. According to the report, red teaming in this sector accounts for 36,1% of incidents, reflecting a mature, compliance-driven approach to proactive defence, while confirmed APT activity remains comparatively low at 11,5%.

This pattern indicates that sustained investment in security assessment can effectively enhance a company’s ability to identify vulnerabilities early, avoiding costly breaches and reducing the risk of significant damage to reputation and operations.

“Government, industrial and IT organisations consistently attract sophisticated adversaries because of the strategic value of what they hold, operate and connect to geopolitical intelligence, critical infrastructure and global supply chains respectively. The 2025 data confirms that these attacks are not opportunistic: they are targeted and often aimed at establishing persistent access.

Each of these sectors needs to operate on the assumption that determined attackers will find a way in, and focus their defences on early detection, rapid containment and minimising the window of exposure. So, proactive threat hunting, continuous monitoring and regular compromise assessments are no longer optional for organisations of any size across these industries,” comments Sergey Soldatov, Head of Security Operations at Kaspersky.

 


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FCCPC Licenses 5 Firms for Airtime, Data Lending as Telcos Step Aside

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Federal Competition and Consumer Protection Commission (FCCPC) has approved five companies to provide airtime and data lending services in Nigeria, following the suspension of such services by mobile network operators (MNOs).

FCCPC Licenses 5 Firms for Airtime, Data Lending as Telcos Step Aside

FCCPC

The affected telecom operators, including MTN Nigeria and Airtel Nigeria, had announced the temporary halt of their airtime and data credit services in compliance with new regulatory requirements.

Checks indicate that Globacom and 9mobile (formerly Etisalat Nigeria) have also suspended the services, making it a sector-wide decision among telecom operators.

In a statement, the Federal Competition and Consumer Protection Commission said the newly approved firms include Total Tim Nigeria Ltd., Rane Interactive Medien CLS Ltd., Mode NG Applications Ltd., Cloud Interactive Associate Ltd., and Coverage Broadband Ltd.

The commission said the companies met all requirements under the Digital, Electronic, Online or Non-Traditional Consumer Lending Regulations, 2025.

It explained that the regulation aims to ensure fairness, transparency, and improved consumer protection within Nigeria’s digital lending ecosystem.

Speaking on the development, Ondaje Ijagwu, Director of Corporate Affairs at the Nigeria Data Protection Commission, said some telecom operators had engaged in exclusionary arrangements in violation of existing laws.

He noted that the framework was introduced to open up the market to both local and international participants in line with free market principles.

Ijagwu added that telecom operators were initially given a 90-day compliance window from July 2025, which was later extended to Jan. 5, 2026, but the required adjustments were not completed within the stipulated period.

A telecom official, who spoke on condition of anonymity, said the new regulatory demands added to existing oversight by the Nigerian Communications Commission, thereby creating multiple layers of compliance for operators.

“Telcos are enablers of other sectors and already fully regulated. Additional compliance requirements from different regulators can be distracting,” the source said.

The official added that operators had opted to step aside temporarily while observing developments, noting that some revenue loss would occur as a result of the suspension.

He, however, said telecom companies would still play a role by supplying airtime to the licensed lenders through commercial agreements.

Meanwhile, subscribers have expressed concern over the suspension of the services, particularly those who rely on airtime borrowing during emergencies.

Some users said the popular USSD code *303# is no longer providing the relief it once offered, describing the development as a setback for many Nigerians facing financial constraints.

Ravenewsonline reports that the FCCPC had earlier set Oct. 31, 2025, as the deadline for digital lenders to register or face sanctions, including a fine of N100 million.

The deadline was later extended to Jan. 5, 2026, to allow for full compliance across the sector.


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4 Nigerian Startups Selected to Join Milestone 10th Google for Startups Accelerator Africa Cohort

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Four Nigerian technology startups – Bani, MasteryHive AI, Regxta, Termii – have been selected to join the 10th cohort of the Google for Startups Accelerator Africa.

4 Nigerian Startups Selected to Join Milestone 10th Google for Startups Accelerator Africa Cohort

Chosen from an exceptionally competitive pool of nearly 2,600 applications, these innovators are part of a final pan-African group of 15 companies. With an acceptance rate of less than 1%, their selection highlights the immense technical talent and resilience emerging from Nigeria’s digital ecosystem.

The selected Nigerian startups are utilizing Artificial Intelligence to address critical local and regional challenges:

Bani : A cross-border payments infrastructure platform eliminating settlement delays for African businesses trading globally.

MasteryHive AI : An AI-native platform automating transaction reconciliation, fraud detection, and AML monitoring.

Regxta : Combines alternative data-driven credit scoring with a hybrid digital-agent distribution model to deliver financial products to unbanked micro businesses.

Termii : An AI-native communications infrastructure platform ensuring reliable financial messaging for banks and fintechs.

African tech founders are actively solving fundamental infrastructural challenges, bridging gaps in financial inclusion, healthcare, and supply chains with complex AI. The continent’s venture ecosystem showed remarkable resilience by raising $3.9 billion in 2025. However, scaling deep-tech solutions requires specialized technical infrastructure, advanced cloud capabilities, and strategic mentorship to complement this capital. Accelerator programs provide these exact tools, ensuring local innovations can sustainably grow into businesses that power the continent’s digital economy.

Gbolade Emmanuel, CEO of Nigeria-based Termii, noted: “At Termii, we’re building AI-powered infrastructure that ensures financial transactions don’t fail, from login PINs to payment OTPs and fraud alerts. The Google Startup Accelerator is helping us accelerate our AI roadmap and scale globally, and even in the first week, access to technical support and insights has been incredibly valuable for our next phase of growth.”

“We are absolutely thrilled to welcome these exceptional founders into Class 10,” said Folarin Aiyegbusi, Head of Startup Ecosystem, Africa. “African startups are driving essential economic growth and social development. Our role is to serve as a supportive partner, providing these developers and founders with the technical infrastructure, mentorship, and global network they need to scale their solutions and amplify their real-world impact.”

Running from April 13th to June 19th, 2026, the hybrid program will provide the 15 startups with dedicated guidance from experienced mentors and industry experts, alongside hands-on technical workshops focused on AI and machine learning.

Since launching in 2018, the Google for Startups Accelerator Africa program has supported 106 startups from 17 African countries, empowering them to collectively raise over $263 million and create more than 2,800 jobs.

For more information on the full list of 15 startups participating in Class 10, please visit the Google Africa Blog at https://blog.google/intl/en-africa/company-news/meet-the-15-startups-joining-the-google-for-startups-accelerator-africa-class-10/.


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