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My years of experience managing security programs, across a broad spectrum of industries, has given me a greater understanding of how technology and people both play a critical role in influencing the overall security posture of any organization.
Prevent IP Address Spoofing
“Things are not always what they seem; the first appearance deceives many”. Phaedrus.
IP Address Spoofing is sometimes referred to as IP Address Forgery, and as the name suggests it’s a technique commonly used by hackers to perform malicious activities, such as Man in the Middle (MiTM), Denial of Service (DoS) and Dedicated Denial of Service (DDoS) attacks. It is generally used to maintain anonymity and cause havoc on the Internet.
To first understand what IP Address Spoofing is; and how it is used, we need to have an appreciation of the underlying protocol(s) that open the door for manipulation. Which essentially is IP, TCP and UDP and the ability to manipulate the packet header information (source address field).
Current State and Attacks
In an age of Botnets where an attacker has a layer of abstraction behind a command and control server, some people think that IP Address Spoofing is no longer an issue. When in fact the reality is the opposite, IP Address Spoofing remains a real problem to defend against. In some cases, IP Address Spoofing is necessary for an attacks success, where it provides an additional layer of anonymity and protection for a botnet (see DNS DDoS Amplification Attack).
So, due to the inherent ability to manipulate a packets header in the protocol stack is where the ability to perform malicious attacks such as:
MiTM – Where a malicious user intercepts a legitimate communication between two parties. The injected, malicious host then controls the transmission flow and can eliminate or alter the information within the data stream without the knowledge of the original sender or recipient. In this scenario, the attacker fools the victim into disclosing confidential information by “spoofing” the original sender’s address / identity.
DoS / DDoS – Since some malicious users are only concerned with consuming resources and bandwidth, they attempt to “flood” the victim network with large volumes of traffic to consume system resources. In order to maintain the effectiveness of the attack, the attacker will “spoof” the source IP addresses to make stopping and tracing of the attack as difficult as possible. This is amplified when multiple compromised hosts all have “spoofed” addresses and are participating in the attack.
What can you do to defend against IP Address Spoofing attacks?
Firstly, ensure that your firewall and routers are configured correctly and restrict the advance of forged traffic from the internet. For many years now firewall vendors have included a configurable anti-spoofing defence mechanism to block the use of private (RFC 1918) addresses on the external interface. In addition, the external (internet facing) interface should not accept any addresses that are used in the internal network range as the source. You should also prevent source addresses from outside of your valid public network range, which will prevent any of your neighbour’s from sending spoofed traffic to the Internet.
As an example, if the attacker sits within the 126.96.36.199/24 network range that is provided Internet connectivity by ISP D. An input traffic filter on the ingress link of router 2 (which provides internet connectivity to the attacker’s network) restricts traffic to allow only traffic that originates from the source addresses within the 188.8.131.52/24 network prefix and prohibits the attacker from using any “invalid” source addresses that reside out of the prefixed range.
IP Address Spoofing is a difficult problem since its inherent weakness is due to the design of the protocol suite. However, understanding how and why one would use a spoofing attack can greatly increase your chances of successfully defending an attack. Using Security Manager, FireMon provide the ability to perform a regular assessment of your firewall and its configuration against best of breed configuration practices. Security Manager includes a number of pre-built compliance reports that will save your security administrators valuable time and effort and assist your organisation to quickly find misconfigurations, the implementation of risky services and unused rules that could expose your network to attack.
A quick glance at the Firewall Configuration Best Practices report can provide your security managers with the detailed information needed to appropriately manage your organisations security on a regular basis.
Each configuration check that Security Manager is able to perform can be drilled into by clicking the item to show more detail.
Don’t be fooled by a masquerading IP; contact a Firemon representative today for a demonstration of Security Manager and how we can help your organisation and prevent your systems from being spoofed.
So you’ve purchased a new firewall. Now what?
You’ve got to decide which access is allowed, which isn’t allowed and whether or not rules are compliant with internal and regulatory standards.
Things are running along smoothly and then the dreaded “change.” A user submits a new access request and the fun begins. Is this access necessary? Safe? Compliant? And what happens when it’s time to retire unused rules?
How Effective Security Management Can Help Teams Cover the Exponentially Increasing Gap between Technology & the Resources Available to Manage It
Security teams today are under tremendous pressure due to the rising frequency and impact of breaches and a business that wants to move faster and faster. The answer to both of these challenges has always been to add more technology and staff resources.
However, each new technology added creates complexity. More rules are created and more data is generated. As networks continue to evolve, this complexity will only grow. And while staff resources may increase, they will never match the exponential growth of technology.
FireMon calls this phenomenon The Complexity Gap and has set out to help security teams close it.
Join us for this webinar with Frost & Sullivan where we’ll explore the causes of “The Gap” and how workforce multipliers such as intelligence and automation help staff manage their security more efficiently and more effectively.
En la actualidad, uno de los retos principales es preparar las redes de seguridad, no sólo para enfrentar las amenazas, sino también para enfrentar los cumplimientos. El día 26 de enero se publicó en el Diario Oficial la LEY GENERAL DE PROTECCIÓN DE DATOS PERSONALES EN POSESIÓN DE SUJETOS OBLIGADOS.
¿Está tu red preparada?
¿Cuentas con los procesos necesarios para el cumplimiento?
En esta era digital los datos personales de nuestros clientes y proveedores pasan por una red y se almacenan en una base de datos. Éstos, por ley, deben protegerse por medio de sistemas y procesos. Uno de los objetivos de esta ley es establecer las condiciones de tratamiento de datos personales y fomentar la cultura de protección.
La Ley de protección de datos es mucho más que un simple aviso de privacidad; esta ley describe derechos y obligaciones que de incumplirse pueden ser penalizados. Asiste a este Webinar para conocer más y prepararte. Te mostraremos:
In the fall of 2016, we sought the answer to a very simple question: What benefits do users who have a firewall management tool deployed with their firewalls see over nonusers? To find out, we commissioned Forrester Consulting to survey 188 IT security decision makers.
In their study, “Automate Zero Trust Policy & Enforcement,” Forrester Consulting found that organizations with firewall auditing and configuration tools realize more benefits that those without, including:
In this webinar, guest Speaker Josh Zelonis, Senior Analyst with Forrester, will review and discuss the results of the study with FireMon CTO Paul Calatayud who will bring his own experiences and best practices for deploying firewall management tools to improve productivity and reduce risk.
Helping Enterprise Security Teams Improve Resource Efficiency & Reduce Overall Risk Exposure
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.