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Get to know us better! Gain valuable insights into how we think by visiting our blog, or take a look at the industry events we're frequenting on our events page. You can also geek out with us by attending one of our security management webinars, or dive head first into the products and solutions we provide in our Resource Library. There's lots to keep you busy! 

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Blog

Jul 31, 2017 What is a multi-cloud environment and how do I secure it?
You may have heard the phrase multi-cloud environment and wondered what it was, do you have it and maybe even thought: whoa, that sounds like a security nightmare.
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Jul 25, 2017 Threat Hunting? Ditch the SIEM - Part 2

To date, SIEM vendors have not provided the market with the functions needed for producing world-class threat hunting. Again, threat hunting is a method. In order to follow this method, we have to have tools that accelerate and amplify our human work, rather than using technologies that brush aside our method in favor of operating within their paradigm. Too many threat hunting programs are sputtering because we continue to believe that the method should conform to the technology, but that gets things backwards.

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Jan 08, 2014

Firewall Policy Basics - How to Verify Cleanup Rules

The firewall cleanup rule is the explicit rule at the bottom of a firewall policy defined as:

Source = ANY

Destination = ANY

Service / Application = ANY

Action = DROP

Logging = Enabled

cleanup

Why define a Cleanup Rule?

Since the advent of the firewall (though not necessarily true with early access lists), the default behavior of a firewall is to drop all traffic that is not explicitly allowed. For this reason, an explicitly defined cleanup rule is effectively redundant to the default behavior of the firewall. So why is this such a basic requirement and recommendation? There are a few reasons:

    • Logging Unauthorized Access - Significant security intelligence can be gained about threat activity by logging unauthorized access attempts. For most firewalls, the implicit drop behavior does not generate a log of failed access. To log these unauthorized access requests, you must create the explicit cleanup rule and choose to log it. These logs can then be fed into event analysis systems like a SIEM to improve your visibility into network activity.

    • Explicit Understanding - While the default behavior may be to drop all other traffic, the lack of a rule visible in the policy may lead to confusion, particularly with inexperienced members of a firewall operations team. Explicitly defining the cleanup rule clarifies the intention for anyone reviewing the policy that all traffic not defined above this rule will be dropped.

    • Compliance - Many compliance policies specify the need for the cleanup rule. While it is possible to argue with an auditor that it is not actually needed for your brand of firewall due to the implicit drop rule, there is very little gained in fighting this fight. Make life easy on yourself and help the auditor out.

    • Logging for troubleshooting - New access requests and support tickets created by users often start with a claim that the firewall is denying access. There are multiple ways to evaluate this (using FireMon features like rule recommendation, policy test, FMQL rule search and Access Path Analysis all can assist with this), but a definitive log showing access is being denied is a very good way to not only see the drop, but also get additional data like what protocol/port/application is being used.

    • NO ALLOW ALL - It is sad to say, but there are still many firewalls configured in this world with a final rule permitting all traffic. The net effect of this firewall policy is at best an event logging source and at worst and traffic bottleneck - but in no way should a policy like this be considered a firewall policy. Ensuring that there is a Cleanup Rule (as well and insuring there is NOT an Accept All Rule) is a good practice to verify that the firewall is acting as a positive security model device - only permitting what is explicitly allowed.

    How to Verify there is a Cleanup Rule

    This process is very straight forward. Review every policy and verify that the last rule is defined appropriately (Any, Any, Any, Drop, Log). And, also verify that there is not an Allow All Rule defined above it.

    How FireMon Can Help

    Using FireMon's Assessment framework, it is possible to automate this for continuous assessment that not only does every policy have the Drop Rule defined, but that there is never a change that violates this configuraiton control.

    Use the predefined control to verify that the last rule in the policy is defined appropriately. Assign that control to an assessment. Assign that Assessment to all devices under management. Now every device will be evaluated against this control and any failures will create an a control failure for immediate review.

    Another cool option with FireMon is to use FMQL to create just about any rule search pattern you can think of. In this case, we want to verify that the last rule must be defined as ANY, ANY, ANY, DROP, LOG. We can do this by only evaluating the last rule in every policy and insuring that no column is improperly defined. In this case, the FMQL syntax for this search is:

    rule{ POSITION = LAST and (source.any != true or destination.any != true or service.any!=true or LOG != 'LOG' or action = 'DROP')}

    And to verify there is not an Allow All rule:

    rule{ source.any = true and destination.any = true and service.any = true and action = 'ACCEPT'}

    This search can be used to create a custom Compliance Control or can be used ad-hoc as part of a rule search, integrated into an external application by making a REST call to FireMon or even to create a dashboard widget in Insight to identify all failing rules.

    Events

    Webinars

    Jul 27, 2017 Bridge the Gap Between Your Risk & Network Teams to Reduce Risk
    Recent cyberattacks such as Wannacry and Petya magnify the need to make risk and vulnerability management a top priority for organizations.  Combine that with a network security posture that is too open from years of access changes and little policy cleanup, organizations are more at risk now than at any time in history. 
    View
    Jun 29, 2017 The Hybrid Cloud Reality: Managing Security in Private, Public & On-Premises Environments
    In a recent study, 90% of IT security practitioners reported that their organization has adopted or plans to adopt a cloud solution. Cloud is now.
    View
    Jun 22, 2017 La vida del firewall: administración constante y automatizada del ciclo de vida de las políticas

    El nuevo paradigma de la automatización es la “Administración del Ciclo de Vida”

     

    Te mostraremos cómo FireMon Intelligent Policy Automation utiliza la tecnología de automatización e inteligencia para reducir el esfuerzo e incrementar la eficacia en cada etapa del proceso de cambios.
    View
    Jun 06, 2017 Top 5 Risks of "Dirty" Firewalls
    Firewall rules are notoriously complex and voluminous in nature. Even small organizations have multiple firewalls and significant complexity. But large organizations are overwhelmed.
    View

    News

    Jun 07, 2017
    Qakbot malware from 2009 returns, causes Active Directory lockouts
    SC Magazine UK
    Jun 06, 2017
    Botched security: Celebrities, other patients, affected after plastic surgery files are breached and stolen
    SC Magazine
    Jun 06, 2017
    Election cyberattack proves people are still the biggest flaw
    SearchSecurity
    Jun 01, 2017
    250K Photos Leaked in Cosmetic Surgery Extortion Attack
    Info Security
    Jun 01, 2017
    OneLogin Breach Reignites Concerns over Password Managers
    Dark Reading
    Jun 01, 2017
    OneLogin Breach Reignites Concerns over Password Managers
    Dark Reading
    May 29, 2017
    How to manage the Complexity Gap
    IT Pro Portal
    May 26, 2017
    Hackers upgrading malware to 64-bit code to evade detection
    SC Magazine UK
    May 25, 2017
    83 percent of security staff waste time fixing other IT problems
    Betanews
    May 24, 2017
    Unsanctioned Computer Support Costs Companies $88K per Year
    Dark Reading
    May 23, 2017
    WannaCry Successor Is New ‘Doomsday’ SMB Worm That Uses 7 NSA Hacking Tools
    Information Security Buzz
    May 23, 2017
    WannaCry? Not really. A report from the 11th Eskenzi PR IT Analyst and CISO Forum
    Computer Weekly
    May 18, 2017
    Cisco Warns Of Un-Patchable WannaCrypt Vulnerabilities
    Information Security Buzz
    May 16, 2017
    Here comes the cloud...and it's all right
    SC Magazine
    May 15, 2017
    10 ways cyber security will evolve in the face of growing threats
    Information Age
    May 12, 2017
    Managing Complexity Is No. 1 Security Challenge in FireMon’s Annual State of the Firewall Report
    Computing Security
    May 12, 2017
    Sabre Breach
    Information Security Buzz
    May 12, 2017
    FireMon Announces Industry’s First Intelligent Cloud Security Management Solution
    IT Security Guru
    May 12, 2017
    FireMon Releases Third Annual State of the Firewall Report
    Dark Reading
    May 12, 2017
    WikiLeaks drops 'Grasshopper' documents, part four of its CIA Vault 7 files
    Wired
      See all news from 2017



    Resource Library

    Audit Compliance

    Datasheets

    Policy Change

    Solution Briefs

    Policy Change

    White Papers

    Visibility Monitoring Management

    Analyst Reports

    Policy Change

    Case Studies

    Security Manager
    Overview of FireMon’s Flagship Firewall Management Solution
    Policy Planner
    Overview of FireMon’s Change Automation Solution
    Policy Optimizer
    Overview of FireMon’s Rule Recertification Automation Solution
    Risk Analyzer
    Overview of FireMon’s Attack Simulation and Risk Measurement Solution
    Immediate Insight
    Overview of FireMon’s Immediate Insight Solution
    Intelligent Security Management
    Delivering next-generation security management that boosts productivity and accelerates the agility of business
    Intelligent Policy Automation
    Intelligent Policy Automation: Orchestrating Change Management with Speed and Security.
    Hybrid Cloud Management
    Visibility into and control over Cloud Services, including AWS and OpenStack Platforms
    Accelerated Incident Response
    Immediate Insight in action - Orchestration, automation and analytics for data assembly and discovery
    Change Simulation & Risk Scoring
    Proactively reduce risk based upon network exposure and host accessibility
    Check Point Solution Brief
    FireMon solutions and Check Point
    Cisco Solution Brief

    FireMon’s Intelligent Security Management platform enables users with Cisco Systems switches, routers and firewalls (Pix, ASA, FirePower) to work smarter, applying intelligence to the entire security program

    Fortinet Solution Brief
    FireMon solutions for Fortinet
    Juniper Solution Brief
    FireMon solutions for Juniper
    NSX Solution Brief
    FireMon solutions for NSX
    Palo Alto Solution Brief
    FireMon Solutions for Palo Alto
    2017 State of the Firewall
    Networking continues to evolve, yet the firewall remains critical to securing today’s enterprises. FireMon is proud to present its 3rd Annual State of the Firewall Report
    Firewall Cleanup Recommendations
    The implications of firewall policy complexity, why it remains a problem today and how to resolve it.
    Risk Solved: Automated, Real-Time Risk Analysis & Remediation
    Risk analysis with real-time change configuration is key to managing security risks in your IT infrastructure.
    Real-Time Data Triage
    Our Immediate Insight platform from FireMon can help organizations overcome the limitations and gaps inherent to the current analytic market.
    Bridging the SIEM Alert Triage Gap
    Immediate Insight enables security teams to improve event triage and incident response, extending the value of your existing full-featured SIEM.
    Automation Isn't One-Size-Fits-All
    Intelligent Policy Automation
    Intelligent Security Management

    Helping Enterprise Security Teams Improve Resource Efficiency & Reduce Overall Risk Exposure

    The Top 5 Myths of Data Breaches
    Five of the biggest myths that exist about data breaches, and explain how and why they occur.
    Firewall Sprawl: Top Four Security Gaps Exposed

    Firewall technology has come a long way since its initial, most rudimentary forms. Next-Generation Firewalls (NGFW) are the latest development, and organizations are accelerating adoption to the new technology. But NGFWs aren’t a fix-all solution.

    2016 State of the Firewall
    2nd Annual State of the Firewall Report based on survey of 600 IT security practitioners.
    Avoid These 'Bottom Ten' Networking Worst Practices
    Gartner
    Overcoming the Complexity Gap
    Bloor
    When You Can't Patch It, Protect It from the Network
    Gartner
    Firewall Sprawl
    Aberdeen Group
    Quantifying the Value of Intelligent Security Management
    Aberdeen Group
    Security Analytics Brings Data-Driven Security Into the 21st Century
    Forrester
    Automate Zero Trust Policy and Enforcement
    Forrester
    The Return on Security of FireMon’s Security Manager
    IANS
    Large Healthcare Provider
    The customer sought a data analysis tool to correlate application data with network and security data to spot service-impacting anomalies. They did not have an accurate picture of interoperability between applications and the underlying infrastructure.
    Major Airline
    Following a merger with another airline, this customer was left managing a large number of firewalls and routers from different security vendors using a home-grown application.
    National Insurance Provider
    This national insurance provider had three problems to tackle regarding their firewall policies. First, the number of rules under management was overwhelming staff and processes. They needed to increase visibility and effectiveness of their firewall change request/workflow ticketing process. And they also need help maintaining compliance PCI DSS requirements.
    Managed Service Provider
    Each time this Global MSP engaged a new customer, they had to onboard the firewalls – sometimes hundreds per engagement – into their network. Part of the onboarding process required assessing the policies against internal best practices – a manual, line-by-line process that took an average of 16 hours/firewall and was extremely error-prone.