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Get a quick demo Work email* First name* Last name* Company* country* Select country... Short answer* By submitting this form, I accept AlgoSec's privacy policy Schedule a call See why over 2,300 companies trust AlgoSec AlgoSec help you to understand the traffic around the applications and it's all on your fingertips Todd Sharer • System Engineer, Nationwide AlgoSec gave project leaders the rules involved in the migration of their applications, which reduced the IT security team’s time on these projects by 80% Bruno Roulleau • Network Security Architect, Sanofi Most application owners don’t know what access is needed. This tool helps them learn what needs to be implemented to reduce the attack surface. Scott Theriault • Global Manager Network Perimeter Security, NCR

NAT Network Security I came across some discussions regarding Network Address Translation (NAT) and its impact on security and the... Firewall Change Management To NAT or not to NAT – It’s not really a question Prof. Avishai Wool 2 min read Prof. Avishai Wool Short bio about author here Lorem ipsum dolor sit amet consectetur. Vitae donec tincidunt elementum quam laoreet duis sit enim. Duis mattis velit sit leo diam. Tags Share this article 11/26/13 Published NAT Network Security I came across some discussions regarding Network Address Translation (NAT) and its impact on security and the network. Specifically the premise that “ NAT does not add any real security to a network while it breaks almost any good concepts of a structured network design ” is what I’d like to address. When it comes to security, yes, NAT is a very poor protection mechanism and can be circumvented in many ways. It causes headaches to network administrators. So now that we’ve quickly summarized all that’s bad about NAT, let’s address the realization that most organizations use NAT because they HAVE to, not because it’s so wonderful. The alternative to using NAT has a prohibitive cost and is possibly impossible. To dig into what I mean, let’s walk through the following scenario… Imagine you have N devices in your network that need an IP address (every computer, printer, tablet, smartphone, IP phone, etc. that belongs to your organization and its guests). Without NAT you would have to purchase N routable IP addresses from your ISP. The costs would skyrocket! At AlgoSec we run a 120+ employee company in numerous countries around the globe. We probably use 1000 IP addresses. We pay for maybe 3 routable IP addresses and NAT away the rest. Without NAT the operational cost of our IP infrastructure would go up by a factor of x300. NAT Security With regards to NAT’s impact on security, just because NAT is no replacement for a proper firewall doesn’t mean it’s useless. Locking your front door also provides very low-grade security – people still do it, since it’s a lot better than not locking your front door. Schedule a demo Related Articles Q1 at AlgoSec: What innovations and milestones defined our start to 2026? AlgoSec Reviews Mar 19, 2023 · 2 min read 2025 in review: What innovations and milestones defined AlgoSec’s transformative year in 2025? AlgoSec Reviews Mar 19, 2023 · 2 min read Navigating Compliance in the Cloud AlgoSec Cloud Mar 19, 2023 · 2 min read Speak to one of our experts Speak to one of our experts Work email* First name* Last name* Company* country* Select country... Short answer* By submitting this form, I accept AlgoSec's privacy policy Schedule a call

Discover AlgoSec Horizon: an application-centric security platform offering automated, seamless management for hybrid networks. Today, leading CISOs strive to bring cloud and datacentre security teams together, recognizing that applications are increasingly interconnected across multiple clouds and datacenters.
This complexity demands a platform that provides holistic coverage across their entire estate.
The AlgoSec Horizon platform is purpose-built to address this critical challenge. ALGOSEC HORIZON PLATFORM Secure application connectivity across your hybrid environment Secure your enterprise network ASMS AlgoSec Security Management Suite Learn more Secure your cloud network ACE AlgoSec Cloud Enterprise Learn more Horizon AppViz Horizon FireFlow Horizon Security Analyzer AlgoSec Cloud Featuring Prevasio Technologies ALGOSEC HORIZON PLATFORM Secure application connectivity across your hybrid environment Secure your enterprise network ASMS AlgoSec Security Management Suite Learn more AppViz FireFlow Firewall Analyzer Secure your cloud network ACE AlgoSec Cloud Enterprise Learn more AlgoSec Cloud Featuring Prevasio Technologies AlgoSec Horizon Platform Secure application connectivity across your hybrid environment Schedule a demo Experience the power of AlgoSec Horizon— the industry's first application-centric security management platform for the hybrid network environment. Gain deep visibility, automate security changes and ensure continuous compliance in your datacenter and multi-cloud network Streamlining Connectivity & Security with AlgoSec Horizon Applications are the backbone of modern business, but managing their connectivity across hybrid environments is increasingly complex. Disparate systems, security risks, and compliance demands add to the challenge. Futureproofing cloud and datacenter security convergence, the AlgoSec Horizon platform unifies on-premises and cloud environments, ensuring seamless connectivity, robust security, and continuous compliance. eBook - Secure application connectivity across your hybrid environment Discover actionable insights to reduce complexity, secure your applications, and ensure seamless connectivity across on-premises and cloud environments. Download now Why prioritize your application security? Listen to Chris Thomas, AlgoSec CRO , discus secure application connectivity anywhere and the need for optimizing policies for a seamless experience. Nationwide Mutual Insurance testimonial See how applying an application centric approach allowed Nationwide Insurance to easily visualize and manage their applications' security policies throughout their entire network. Executive brochure Discover the business benefits of AlgoSec Horizon Platform in this executive brochure Download now Schedule time with one of our experts Thank you for registration! We are excited to meet you at the event, at our booth. Work email* First name* Last name* Company* country* Select country... Short answer* By submitting this form, I accept AlgoSec's privacy policy Schedule a call

Enterprise Guide To Cloud Security Download PDF Download PDF Add a Title Add a Title Add a Title Schedule time with one of our experts Work email* First name* Last name* Company* country* Select country... Short answer* By submitting this form, I accept AlgoSec's privacy policy Continue

One fabric every app Download PDF Download PDF Add a Title Add a Title Add a Title Schedule time with one of our experts Work email* First name* Last name* Company* country* Select country... Short answer* By submitting this form, I accept AlgoSec's privacy policy Continue

Explore Algosec's customer success stories to see how organizations worldwide improve security, compliance, and efficiency with our solutions. Atruvia (formerly Fiducia IT AG) Reduces Security Risks For Banks With Algosec Organization Atruvia Industry Technology Headquarters Karlsruhe, Deutschland Download case study Share Customer
success stories "AlgoSec’s Security Management Solution is incredibly powerful. Its intelligent process improvements have directly translated into the highest level of security and compliance for our customers’ networks" Background With over 45 years’ experience in the banking sector, Atruvia ( formerly Fiducia IT AG) is one of the top ten IT providers in Germany. Today, Atruvia manages the IT networks of nearly 1,100 banks, constituting more than 100,000 PC workstations, 6,600 servers and 25,000 self-service banking terminals. Responsible for ensuring the smooth and secure processing of more than 16 billion transactions per year for its customers, Atruvia’s risk mitigation and regulatory compliance strategies are of utmost importance. Challenge To protect its customer networks, Atruvia implemented a number of security solutions, including 60 Check Point and 20 Juniper firewall clusters. However, managing multiple firewalls in a multi-vendor environment proved challenging. “Performing vulnerability assessments for such a large and complex firewall environment was extremely time-consuming, labor-intensive and prone to human error,” says Lutz Bleyer, Atruvia’s Chief Information Security Officer. With multiple stakeholders at each of its client organizations, Atruvia required a structured change management process to prevent firewall policies from growing unmanageable and creating security risks. “We needed a proven firewall management and workflow solution to eliminate potential security risks while providing us with complete visibility into our customer networks, anytime, anywhere,” says Bleyer. Solution After an in-depth analysis, Atruvia chose the AlgoSec Security Management Solution to optimize its security, compliance and change management processes. “AlgoSec provided the most comprehensive, intelligent automation solution for our firewall operations, helping us increase efficiency while improving risk mitigation and compliance,” says Bleyer. Results AlgoSec’s topology-aware technology provides Atruvia with complete visibility into the security landscape of its customers’ networks. “AlgoSec’s in-depth visibility enables us to easily create a hierarchy profile and establish a competency baseline of operations for each networks’ firewalls, even when multiple vendor technologies are involved,” says Bleyer. Atruvia’s security consultants and auditors are now closely aligned with their customers’ IT teams, regardless of their location. “The level of visibility AlgoSec provides across our customers’ security networks, and the ability to perform coordinated tasks remotely with them, enables us to work hand-in-hand as a joint team,” says Bleyer. Atruvia also uses AlgoSec to automate policy change management across customers’ firewall environments, enabling the company to eliminate manual and inefficient processes associated with the security policy change lifecycle, save time and reduce the potential for human error. “AlgoSec has fundamentally changed how we manage sophisticated, multi-device, multi-vendor firewall environments. By automating our workflows, we’ve eliminated unnecessary policy changes and reduced the time required to process changes by half,” explains Bleyer. “Thanks to AlgoSec’s intelligent automation, we’ve gained valuable optimization capabilities enabling our teams to operate smarter and faster.” Another important AlgoSec feature is its automatic assessment and reporting capabilities, which help Atruvia ensure that it remains in continuous compliance with corporate governance rules and adheres to regulatory standards, including ISO 27001, ISO 27002 and Sarbanes-Oxley (SOX). Data and network security, particularly within the financial sector, requires incredible focus on risk management and mitigation. “With AlgoSec we can now analyze every change and its impact on the network before it is live, and focus on risk mitigation rather than crisis management.” In summary, Bleyer commented, “Not only does AlgoSec more than measure up from a technology perspective, but the integrity of the company and its employees has surpassed our expectations and raised the bar for what we look for in other partners.” Schedule time with one of our experts

Streamline Network Security Automate & Simplify Network Security Policy Management Empowering enterprises to Secure, Automate, and Accelerate network security. Firewall policy management driven by intelligent automation. End-to-end visibility with robust, zero-trust network segmentation. Firewall policy management driven by intelligent automation. Schedule a demo Trusted by over 2,200 organizations since 2004 Solutions Full-Spectrum of Network Security Solutions Engineered for Business Agility & Compliance Firewall Suite Secure & Simplify Your Network Security ACE AlgoSec Cloud Enterprise AppViz App-Centric Security Visibility FireFlow Automate Change Requests at Scale Objectflow Application-Centric Policy Automation Firewall Suite Simplify and Strengthen Firewall Policy Management Gain full visibility and control of your firewall estate while optimizing rules and ensuring continuous compliance. Core Capabilities: Enterprise Firewall Visibility
 Real-Time Policy Auditing
 Risk-Free Rule Optimization Key Solutions: Rule Cleanup & Optimization Unused Object Identification Shadow & Redundant Rule Detection Firewall Rule Lifecycle Management Compliance-Ready Reporting Solutions Full-Spectrum of Network Security Solutions Engineered for Business Agility & Compliance Firewall Suite Simplify and Strengthen Firewall Policy Management Gain full visibility and control of your firewall estate while optimizing rules and ensuring continuous compliance. Core Capabilities: Enterprise Firewall Visibility
 Real-Time Policy Auditing
 Risk-Free Rule Optimization Key Solutions: Rule Cleanup & Optimization Unused Object Identification Shadow & Redundant Rule Detection Firewall Rule Lifecycle Management Compliance-Ready Reporting ACE Enterprise-Grade Cloud Security Policy Management Centrally orchestrate and enforce network security policies across AWS, Azure, and GCP environments. Core Capabilities: Business-Aware Cloud Security Multi-Cloud Policy Automation Risk-Driven Policy Governance Key Solutions: Auto-Discovery of Cloud Assets Tag-Based Policy Enforcement Change Risk & Impact Analysis Unified Visibility Across Cloud Integration with DevOps & CSPM AppViz Visualize Application Flows for Smarter Security Automatically map application connectivity and its dependencies to streamline troubleshooting, policy design, and change analysis. Core Capabilities: Application Flow Mapping Dependency Discovery Policy Impact Assessment Key Solutions: Auto-Discovery of App Flows Business-Centric Policy Modeling Impact Simulation Before Changes Visual Diagrams for Stakeholders Application-Based Access Review FireFlow Zero-Touch Firewall Change Automation Accelerate firewall policy changes with automated workflows that reduce errors, delays, and manual review processes. Core Capabilities: Automated Change Requests Rule Validation & Risk Scoring Change Lifecycle Tracking Key Solutions: Ticketing Workflow Integration (e.g., ServiceNow) Auto-Risk Assessment of Rule Changes Rule Duplication & Conflict Checks Approvals & SLA Tracking Auto-Implementation via API ObjectFlow Application-Centric Security Policy Management Simplify and automate security change processes from request to implementation—at scale. Core Capabilities: App-Driven Workflow Automation Context-Aware Change Control Full Lifecycle Policy Tracking Key Solutions: Application Connectivity Mapping Integrated Change Approvals Automated Policy Implementation SLA-Based Workflow Control Seamless ITSM Integration Firewall Suite Secure & Simplify Your Network Security ACE AlgoSec Cloud Enterprise AppViz App-Centric Security Visibility FireFlow Automate Change Requests at Scale ObjectFlow Application-Centric Policy Automation Streamline Network Security Automate & Simplify Network Security Policy Management Schedule a demo Still Managing Security Changes Manually? Focus on Growth While AlgoSec Automates Your Policy Management. Schedule a demo We Secure Critical Infrastructure
And Optimize Network Policies To Make Your Business Future-Proof Firewall Policy Management Gain complete control and visibility across hybrid networks by optimizing and auditing firewall rule bases with zero manual effort. Multi-Cloud Security Simplify security management across AWS, Azure, and GCP with automated cloud policy orchestration and risk detection. Application Connectivity Mapping Discover and visualize application flows to reduce change errors and accelerate deployment while maintaining security compliance. Automated Change Management Eliminate delays and human errors with zero-touch workflows that integrate with your ticketing and ITSM systems. Compliance & Risk Analysis Instantly generate audit-ready reports and evaluate the risk of every policy change — before it's implemented. INDUSTRIES Engineering Industry-specific Security Excellence
With Automation, Visibility & Compliance Next Back Healthcare Ensure HIPAA-ready security, uninterrupted connectivity for life-saving apps, and swift breach containment. • Application Flow Mapping • Secure Remote Access • Zero-Touch Change Automation • Regulatory Compliance Reporting Finance Accelerate digital transformation with automated firewall changes and always-on audit compliance. • Application Flow Mapping • Secure Remote Access • Zero-Touch Change Automation • Regulatory Compliance Reporting Restaurant Transform dining experiences with AI-powered solutions for modern restaurants. • Application Flow Mapping • Secure Remote Access • Zero-Touch Change Automation • Regulatory Compliance Reporting eCommerce Build powerful online storefronts with AI-enhanced shopping experiences. • Application Flow Mapping • Secure Remote Access • Zero-Touch Change Automation • Regulatory Compliance Reporting Schedule a call with an expert to start securing application connectivity today Empowering enterprises to Secure, Automate, and Accelerate network security. Firewall policy management driven by intelligent automation. End-to-end visibility with robust, zero-trust network segmentation. Firewall policy management driven by intelligent automation. Book Free Consultation Work email* First name* Last name* Company* country* Select country... Short answer* By submitting this form, I accept AlgoSec's privacy policy Continue

As 2022 comes to a close, Professor Avishai Wool, AlgoSec Co-Founder and CTO, provides his top 5 issues organizations will need to be... IaC 2023 Cybersecurity Predictions and Best Practices Prof. Avishai Wool 2 min read Prof. Avishai Wool Short bio about author here Lorem ipsum dolor sit amet consectetur. Vitae donec tincidunt elementum quam laoreet duis sit enim. Duis mattis velit sit leo diam. Tags Share this article 12/6/22 Published As 2022 comes to a close, Professor Avishai Wool, AlgoSec Co-Founder and CTO, provides his top 5 issues organizations will need to be aware in 2023 that will also dominate the cyber community conversation. 1) Application centric approach to network security will supersede basic NSPM I think the market has matured to the point where the NSPM approach has reached a tipping point and I see the shift to an application perspective becoming the de facto approach in network security policy management as there are better and more robust technologies in the market that can help organizations get there faster. I see this shift becoming even more viable in 2023 based on recent market trends in which organizations are opting for downsizing and trying to do more with the smaller staff at the expense of losing tribal knowledge. As a result, I see organizations shifting more towards adopting a holistic approach to network security that are more application centric in which they can retain critical knowledge, such as application traffic intent and application policy rules, so that the new generations can step in and pick up where the previous predecessors left off. 2) Containerization will enhance layered security I expect container security to be increasingly popular in the future, as companies understand that their existing network security mechanisms are not enough for the communication networks of today. Containers are seen as a cost-effective light-weight solution for deployment – and deploying them introduces another inner layer where security policies can be applied: behind the perimeter filters, the internal zoning, and the micro-segmentation, organizations can now also consider nano-segmentation at the container level. Vulnerability testing is another dimension of the container platform especially within cloud applications and SaaS products. The common Kubernetes platform offers both opportunities and challenges for vulnerability scanners. Beyond 2023 , businesses will need to enhance both their visibility and management capabilities of security within their containerized applications 3) Security driven IaaS ecosystems to improve network security I expect the popularity of Infrastructure as a service (IaaS) to continue to soar, making it difficult for security teams to keep up with the associated risks and vulnerabilities. Pre-set security settings may not meet the needs of the organization and customizing these settings can prove to be difficult. The customizability of IaaS offers great potential for productivity, but it also makes it complicated to secure. The bottom line is that companies can no longer depend on their network perimeter to guard sensitive data. In response, I anticipate organizations that begin utilizing an “Always-on Security” approach such as Infrastructure as Code (IaC) which would permit them to construct personalized policies to control the development environments during each phase of the software development life cycle (SDLC) and recognize potential risks, security flaws, and compliance issues on a what-if basis, before deploying flawed settings into production. 4) Cloud-native security tools will reign supreme I expect that cloud-based security systems will become more commonplace: these security solutions offer a wide range of abilities, such as secure access, identity and access management, data loss prevention, application security, automation of security, detection and prevention of intrusions, security information and event management, and encryption. With companies transitioning more workloads to the cloud, they will want to make use of many of these features. These tools make it possible for remote teams to manage a greater public cloud presence: comfortably configuring services and automating processes, to identify and preemptively tackle any kind of threats. To bridge the gap in cloud data security, I anticipate the emergence of data safeguarding systems that are designed specifically for cloud usage and are able to link up with public cloud systems in an advanced, agentless manner. This has been classified in the market as Cloud Native Application Protection Platform (CNAPP) . These platforms must be able to detect where the data is stored and what sorts of data are stored in the cloud, so that corporations can prioritize on what is most important – defending their most sensitive data and cloud-based applications without interfering with their normal operations. 5) Expect ransomware not to go away and get even more sophisticated Organizations in 2022 saw no let-up from ransomware threats, some of whom were attacked multiple times and I do not see any reason why this trend will change in 2023. Cyber criminals are getting more resourceful and savvier in their attempts to stay ahead of law enforcement, and I anticipate these attacks will only become more frequent as their perpetrators are proving more capable of infiltrating many organizations’ cyber defenses. In response, organizations will have to seek more technology solutions to protect data at the source. But that would not suffice. I think organizations will need to look beyond technological solutions and apply better preparedness strategies. Whether it be Zero Trust or something less overarching but more practical for an organization’s business needs, such as Micro-segmentation , it would ensure that threat-actors would not be able to access the data residing inside the security perimeter. Schedule a demo Related Articles Q1 at AlgoSec: What innovations and milestones defined our start to 2026? AlgoSec Reviews Mar 19, 2023 · 2 min read 2025 in review: What innovations and milestones defined AlgoSec’s transformative year in 2025? AlgoSec Reviews Mar 19, 2023 · 2 min read Navigating Compliance in the Cloud AlgoSec Cloud Mar 19, 2023 · 2 min read Speak to one of our experts Speak to one of our experts Work email* First name* Last name* Company* country* Select country... Short answer* By submitting this form, I accept AlgoSec's privacy policy Schedule a call

AlgoSec SaaS AI Security Download PDF Download PDF Add a Title Add a Title Add a Title Schedule time with one of our experts Work email* First name* Last name* Company* country* Select country... Short answer* By submitting this form, I accept AlgoSec's privacy policy Continue

Micro-segmentation: From Strategy to Execution Download PDF Download PDF Add a Title Add a Title Add a Title Schedule time with one of our experts Work email* First name* Last name* Company* country* Select country... Short answer* By submitting this form, I accept AlgoSec's privacy policy Continue

In this webinar, our experts demonstrate the usage of Objectflow in managing network objects Webinars Introducing Objectflow: Network Security Objects Made Simple In this webinar, our experts demonstrate the usage of Objectflow in managing network objects. January 31, 2022 Yoni Geva Product Manager Jacqueline Basil Product Marketing Manager Relevant resources AlgoSec Horizon AppViz – Rule Recertification Watch Video Changing the rules without risk: mapping firewall rules to business applications Keep Reading Choose a better way to manage your network Choose a better way to manage your network Work email* First name* Last name* Company* country* Select country... Short answer* By submitting this form, I accept AlgoSec's privacy policy Continue

Can Firewalls Be Hacked? Yes, Here’s 6 Vulnerabilities Like all security tools, firewalls can be hacked. That’s what happened to the... Cyber Attacks & Incident Response Can Firewalls Be Hacked? Yes, Here’s 6 Vulnerabilities Tsippi Dach 2 min read Tsippi Dach Short bio about author here Lorem ipsum dolor sit amet consectetur. Vitae donec tincidunt elementum quam laoreet duis sit enim. Duis mattis velit sit leo diam. Tags Share this article 12/20/23 Published Can Firewalls Be Hacked? Yes, Here’s 6 Vulnerabilities Like all security tools, firewalls can be hacked. That’s what happened to the social media platform X in January 2023, when it was still Twitter. Hackers exploited an API vulnerability that had been exposed since June the previous year. This gave them access to the platform’s security system and allowed them to leak sensitive information on millions of users. This breach occurred because the organization’s firewalls were not configured to examine API traffic with enough scrutiny. This failure in firewall protection led to the leak of more than 200 million names, email addresses, and usernames, along with other information, putting victims at risk of identity theft . Firewalls are your organization’s first line of defense against malware and data breaches. They inspect all traffic traveling into and out of your network, looking for signs of cyber attacks and blocking malicious activity when they find it. This makes them an important part of every organization’s cybersecurity strategy. Effective firewall management and configuration is vital for preventing cybercrime. Read on to find out how you can protect your organization from attacks that exploit firewall vulnerabilities you may not be aware of. Understanding the 4 Types of Firewalls The first thing every executive and IT leader should know is that there are four basic types of firewalls . Each category offers a different level of protection, with simpler solutions costing less than more advanced ones. Most organizations need to use some combination of these four firewall types to protect sensitive data effectively. Keep in mind that buying more advanced firewalls is not always the answer. Optimal firewall management usually means deploying the right type of firewall for its particular use case. Ideally, these should be implemented alongside multi-layered network security solutions that include network detection and response, endpoint security, and security information and event management (SIEM) technology. 1. Packet Filtering Firewalls These are the oldest and most basic types of firewalls. They operate at the network layer, checking individual data packets for their source IP address and destination IP. They also verify the connection protocol, as well as the source port and destination port against predefined rules. The firewall drops packets that fail to meet these standards, protecting the network from potentially harmful threats. Packet filtering firewalls are among the fastest and cheapest types of firewalls available. Since they can not inspect the contents of data packets, they offer minimal functionality. They also can’t keep track of established connections or enforce rules that rely on knowledge of network connection states. This is why they are considered stateless firewalls. 2. Stateful Inspection Firewalls These firewalls also perform packet inspection, but they ingest more information about the traffic they inspect and compare that information against a list of established connections and network states. Stateful inspection firewalls work by creating a table that contains the IP and port data for traffic sources and destinations, and dynamically check whether data packets are part of a verified active connection. This approach allows stateful inspection firewalls to deny data packets that do not belong to a verified connection. However, the process of checking data packets against the state table consumes system resources and slows down traffic. This makes stateful inspection firewalls vulnerable to Distributed Denial-of-Service (DDoS) attacks. 3. Application Layer Gateways These firewalls operate at the application layer, inspecting and managing traffic based on specific applications or protocols, providing deep packet inspection and content filtering. They are also known as proxy firewalls because they can be implemented at the application layer through a proxy device. In practice, this means that an external client trying to access your system has to send a request to the proxy firewall first. The firewall verifies the authenticity of the request and forwards it to an internal server. They can also work the other way around, providing internal users with access to external resources (like public web pages) without exposing the identity or location of the internal device used. 4. Next-Generation Firewalls (NGFW) Next-generation firewalls combine traditional firewall functions with advanced features such as intrusion prevention, antivirus, and application awareness . They contextualize data packet flows and enrich them with additional data, providing comprehensive security against a wide range of threats. Instead of relying exclusively on IP addresses and port information, NGFWs can perform identity-based monitoring of individual users, applications, and assets. For example, a properly configured NGFW can follow a single user’s network traffic across multiple devices and operating systems, providing an activity timeline even if the user switches between a desktop computer running Microsoft Windows and an Amazon AWS instance controlling routers and iOT devices. How Do These Firewalls Function? Each type of firewall has a unique set of functions that serve to improve the organization’s security posture and prevent hackers from carrying out malicious cyber attacks. Optimizing your firewall fleet means deploying the right type of solution for each particular use case throughout your network. Some of the most valuable functions that firewalls perform include: Traffic Control They regulate incoming and outgoing traffic, ensuring that only legitimate and authorized data flows through the network. This is especially helpful in cases where large volumes of automated traffic can slow down routine operations and disrupt operations. For example, many modern firewalls include rules designed to deny bot traffic. Some non-human traffic is harmless, like the search engine crawlers that determine your website’s ranking against certain keyword searches. However, the vast majority of bot traffic is either unnecessary or malicious. Firewalls can help you keep your infrastructure costs down by filtering out connection attempts from automated sources you don’t trust. Protection Against Cyber Threats Firewalls act as a shield against various cyber threats, including phishing attacks, malware and ransomware attacks . Since they are your first line of defense, any malicious activity that targets your organization will have to bypass your firewall first. Hackers know this, which is why they spend a great deal of time and effort finding ways to bypass firewall protection. They can do this by exploiting technical vulnerabilities in your firewall devices or by hiding their activities in legitimate traffic. For example, many firewalls do not inspect authenticated connections from trusted users. If cybercriminals learn your login credentials and use your authenticated account to conduct an attack, your firewalls may not notice the malicious activity at all. Network Segmentation By defining access rules, firewalls can segment networks into zones with varying levels of trust, limiting lateral movement for attackers. This effectively isolates cybercriminals into the zone they originally infiltrated, and increases the chance they make a mistake and reveal themselves trying to access additional assets throughout your network. Network segmentation is an important aspect of the Zero Trust framework. Firewalls can help reinforce the Zero Trust approach by inspecting traffic traveling between internal networks and dropping connections that fail to authenticate themselves. Security Policy Enforcement Firewalls enforce security policies, ensuring that organizations comply with their security standards and regulatory requirements. Security frameworks like NIST , ISO 27001/27002 , and CIS specify policies and controls that organizations need to implement in order to achieve compliance. Many of these frameworks stipulate firewall controls and features that require organizations to invest in optimizing their deployments. They also include foundational and organizational controls where firewalls play a supporting role, contributing to a stronger multi-layered cybersecurity strategy. Intrusion Detection and Prevention Advanced firewalls include intrusion detection and prevention capabilities, which can identify and block suspicious activities in real-time. This allows security teams to automate their response to some of the high-volume security events that would otherwise drag down performance . Automatically detecting and blocking known exploits frees IT staff to spend more time on high-impact strategic work that can boost the organization’s security posture. Logging and Reporting Firewalls generate logs and reports that assist in security analysis, incident response, and compliance reporting. These logs provide in-depth data on who accessed the organization’s IT assets, and when the connection occurred. They enable security teams to conduct forensic investigations into security incidents, driving security performance and generating valuable insights into the organization’s real-world security risk profile. Organizations that want to implement SIEM technology must also connect their firewall devices to the platform and configure them to send log data to their SIEM for centralized analysis. This gives security teams visibility into the entire organization’s attack surface and enables them to adopt a Zero Trust approach to managing log traffic. Common Vulnerabilities & Weaknesses Firewalls Share Firewalls are crucial for network security, but they are not immune to vulnerabilities. Common weaknesses most firewall solutions share include: Zero-day vulnerabilities These are vulnerabilities in firewall software or hardware that are unknown to the vendor or the general public. Attackers can exploit them before patches or updates are available, making zero-day attacks highly effective. Highly advanced NGFW solutions can protect against zero-day attacks by inspecting behavioral data and using AI-enriched analysis to detect unknown threats. Backdoors Backdoors are secret entry points left by developers or attackers within a firewall’s code. These hidden access points can be exploited to bypass security measures. Security teams must continuously verify their firewall configurations to identify the signs of backdoor attacks. Robust and effective change management solutions help prevent backdoors from remaining hidden. Header manipulation Attackers may manipulate packet headers to trick firewalls into allowing unauthorized traffic or obscuring their malicious intent. There are multiple ways to manipulate the “Host” header in HTTP traffic to execute attacks. Security teams need to configure their firewalls and servers to validate incoming HTTP traffic and limit exposure to header vulnerabilities. How Cyber Criminals Exploit These Vulnerabilities Unauthorized Access Exploiting a vulnerability can allow cybercriminals to penetrate a network firewall, gaining access to sensitive data, proprietary information, or critical systems. Once hackers gain unauthorized access to a network asset, only a well-segmented network operating on Zero Trust principles can reliably force them to reveal themselves. Otherwise, they will probably remain hidden until they launch an active attack. Data Breaches Once inside your network, attackers may exfiltrate sensitive information, including customer data, intellectual property, and financial records (like credit cards), leading to data breaches. These complex security incidents can lead to major business disruptions and reputational damage, as well as enormous recovery costs. Malware Distribution Attackers may use compromised firewalls to distribute malware, ransomware, or malicious payloads to other devices within the network. This type of attack may focus on exploiting your systems and network assets, or it may target networks adjacent to your own – like your third-party vendors, affiliate partners, or customers. Denial of Service (DDoS) Exploited firewalls can be used in DDoS attacks, potentially disrupting network services and rendering them unavailable to users. This leads to expensive downtime and reputational damage. Some hackers try to extort their victims directly, demanding organizations pay money to stop the attack. 6 Techniques Used to Bypass Firewalls 1. Malware and Payload Delivery Attackers use malicious software and payloads to exploit firewall vulnerabilities, allowing them to infiltrate networks or systems undetected. This often occurs due to unpatched security vulnerabilities in popular firewall operating systems. For example, in June 2023 Fortinet addressed a critical-severity FortiOS vulnerability with a security patch. One month later in July, there were still 300,000 Fortinet firewalls still using the unpatched operating system. 2. Phishing Attacks Phishing involves tricking individuals into divulging sensitive information or executing malicious actions. Attackers use deceptive emails or websites that may bypass firewall filters. If they gain access to privileged user account credentials, they may be able to bypass firewall policies entirely, or even reconfigure firewalls themselves. 3. Social Engineering Tactics Cybercriminals manipulate human psychology to deceive individuals into disclosing confidential information, effectively bypassing technical security measures like firewalls. This is typically done through social media, email, or by telephone. Attackers may impersonate authority figures both inside and outside the organization and demand access to sensitive assets without going through the appropriate security checks. 4. Deep Packet Inspection Evasion Attackers employ techniques to disguise malicious traffic, making it appear benign to firewalls using deep packet inspection, allowing it to pass through undetected. Some open-source tools like SymTCP can achieve this by running symbolic executions on the server’s TCP implementation, scanning the resulting execution paths, and sending malicious data through any handling discrepancies identified. 5. VPNs and Remote Access Attackers may use Virtual Private Networks (VPNs) and remote access methods to circumvent firewall restrictions and gain unauthorized entry into networks. This is particularly easy in cases where simple geo restrictions block traffic from IP addresses associated with certain countries or regions. Attackers may also use more sophisticated versions of this technique to access exposed services that don’t require authentication, like certain containerized servers . 6. Intrusion Prevention Systems (IPS) Bypass Sophisticated attackers attempt to evade IPS systems by crafting traffic patterns or attacks that go undetected, enabling them to compromise network security. For example, they may use technologies to decode remote access tool executable files hidden inside certificate files, allowing them to reassemble the malicious file after it passes through the IPS. Protecting Against Firewall Vulnerabilities Multi-factor Authentication (MFA) MFA adds an extra layer of security by requiring users to provide multiple forms of identification, such as a password and a one-time code sent to their mobile device, before they gain access. This prevents attackers from accessing sensitive network assets immediately after stealing privileged login credentials. Knowing an account holder’s password and username is not enough. Two-factor Authentication (2FA) 2FA is a subset of MFA that involves using two authentication factors, typically something the user knows (password) and something the user has (a mobile device or security token), to verify identity and enhance firewall security. Other versions use biometrics like fingerprint scanning to authenticate the user. Intrusion Prevention Systems (IPS) IPS solutions work alongside firewalls to actively monitor network traffic for suspicious activity and known attack patterns, helping to block or mitigate threats before they can breach the network. These systems significantly reduce the amount of manual effort that goes into detecting and blocking known malicious attack techniques. Web Application Firewalls (WAF) WAFs are specialized firewalls designed to protect web applications from a wide range of threats, including SQL injection, cross-site scripting (XSS), and other web-based attacks. Since these firewalls focus specifically on HTTP traffic, they are a type of application level gateway designed specifically for web applications that interact with users on the public internet. Antivirus Software and Anti-malware Tools Deploying up-to-date antivirus and anti-malware software on endpoints, servers, and Wi-Fi network routers helps detect and remove malicious software, reducing the risk of firewall compromise. In order to work effectively, these tools must be configured to detect and mitigate the latest threats alongside the organization’s other security tools and firewalls. Automated solutions can help terminate unauthorized processes before attackers get a chance to deliver malicious payloads. Regular Updates and Patch Management Keeping firewalls and all associated software up-to-date with the latest security patches and firmware updates is essential for addressing known vulnerabilities and ensuring optimal security. Security teams should know when configuration changes are taking place, and be equipped to respond quickly when unauthorized changes take place. Implementing a comprehensive visibility and change management platform like AlgoSec makes this possible. With AlgoSec, you can simulate the effects of network configuration changes and proactively defend against sophisticated threats before attackers have a chance to strike. Monitoring Network Traffic for Anomalies Continuous monitoring of network traffic helps identify unusual patterns or behaviors that may indicate a security incident. Anomalies can trigger alerts for further investigation and response. Network detection and response solutions grant visibility into network activities that would otherwise go unnoticed, potentially giving security personnel early warning when unannounced changes or suspicious behaviors take place. Streamline Your Firewall Security With AlgoSec Organizations continue to face increasingly sophisticated cyber threats, including attacks that capitalize on misconfigured firewalls – or manipulate firewall configurations directly. Firewall management software has become a valuable tool for maintaining a robust network security posture and ensuring regulatory compliance. AlgoSec plays a vital role enhancing firewall security by automating policy analysis, optimizing rule sets, streamlining change management, and providing real-time monitoring and visibility. Find out how to make the most of your firewall deployment and detect unauthorized changes to firewall configurations with our help. Schedule a demo Related Articles Q1 at AlgoSec: What innovations and milestones defined our start to 2026? AlgoSec Reviews Mar 19, 2023 · 2 min read 2025 in review: What innovations and milestones defined AlgoSec’s transformative year in 2025? AlgoSec Reviews Mar 19, 2023 · 2 min read Navigating Compliance in the Cloud AlgoSec Cloud Mar 19, 2023 · 2 min read Speak to one of our experts Speak to one of our experts Work email* First name* Last name* Company* country* Select country... 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