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Mar 28, 2024

Firewalls 101: Network Address Translation (NAT)

Paul Painter, Director, Solutions Engineering

As a solutions engineer guiding clients through diverse technologies, I believe the firewall remains a commonly misconstrued element. Its basic functions and the added benefits of advanced features often elude understanding. That’s why we are embarking on a comprehensive series where we delve into the intricate world of firewalls, discussing their fundamental concepts and extensive benefits.

Network Address Translation (NAT) – The Digital Cloak for Your Network

Our first installment explores the crucial role of Network Address Translation (NAT). Unlike a traditional traffic filter, NAT acts as a digital cloak for devices on your private network. It hides their actual IP addresses, preventing direct access from the internet. This protection works by modifying the source or destination IP addresses of data packets traveling through your router or firewall.

Understanding Private IP Addresses

The Internet Engineering Task Force (IETF) in RFC1918 defines three private IP address ranges that are non-routable over the public internet:  –  (  /8 prefix) –  (  /12 prefix) – (  /16 prefix)

Using these ranges for server and device numbering ensures their IPs remain inaccessible from the public internet, necessitating the ability to translate private to public IPs.

The NAT Analogy

Think of this in terms of your office phone system. Each desk phone likely has a public number for external calls. But internally, colleagues use extension numbers to reach each other. The phone system acts like a NAT table, managing the connection between public numbers and internal extensions.

How NAT Works with Firewalls

Similarly, firewalls maintain a NAT table that tracks assignments of public IP addresses to private IP addresses on your network. Each device receives a private IP address (often through Static NAT, a fixed table linking public and private addresses).

However, there might be situations where a server on your network needs to initiate outgoing connections, like downloading patch updates, but doesn’t require incoming communication. Firewalls can dynamically track these internal IPs without assigned public addresses. This allows the server to initiate communication while the firewall translates the private IP for the outgoing traffic.

HorizonIQ: Your Partner in Firewall Management

HorizonIQ, equipped with a skilled technical team, offers consultation and maintenance of your NAT table within managed firewalls. Understanding NAT’s nuances is pivotal for fortifying internet security, and HorizonIQ stands ready to provide expert guidance tailored to your needs.

Stay tuned for further installments in this series where we delve deeper into firewalls and their functionalities, empowering you to make informed decisions about your network security. HorizonIQ is committed to helping you understand the technology that safeguards your valuable digital assets.

Navigate your digital journey with HorizonIQ. Explore our comprehensive suite of solutions.

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About Author

Paul Painter

Director, Solutions Engineering

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Mar 13, 2024

BeyondIT Ascends: HorizonIQ Reimagines its Blog for the New Era

Sameer Aghera

We’re thrilled to announce the relaunch of our blog, formerly known as ThinkIT, as BeyondIT

This evolution reflects not just a name change, but a deeper commitment to HorizonIQ’s overall rebranding strategy. As we propel ourselves and our valued customers towards a future rich with digital possibilities, BeyondIT signifies our unwavering focus on exceeding the boundaries of traditional IT services.

Why BeyondIT?

We believe BeyondIT captures the essence of our proactive partnership with you. We don’t just address your IT needs–we propel you BeyondIT, empowering you to leverage technology as a springboard for unprecedented achievements.

Content Aligned with Our Core Values

BeyondIT will continue to deliver high-quality content that resonates with our core values:

  1. Unwavering commitment to customer success: Our blog will be a treasure trove of insights and strategies designed to help you navigate the ever-changing digital landscape and achieve your unique goals.
  2. Adaptable solutions for every need: Just like our customizable services, BeyondIT content will cater to a wide range of industry segments and business sizes. Whether you’re a startup or an established enterprise, you’ll find valuable takeaways.
  3. Humanizing technology: We believe the human element is paramount. BeyondIT will feature thought leadership pieces from our team, industry experts, and guest contributors, fostering a collaborative space for knowledge sharing.

BeyondIT: Your Trusted Resource

Here’s a glimpse of what you can expect from BeyondIT:

  1. Invaluable industry insights: Stay ahead of the curve with explorations of the latest trends, emerging technologies, and their potential impact on your business.
  2. Practical solutions and case studies: Discover real-world examples of how HorizonIQ has helped businesses overcome challenges and achieve success through innovative technology solutions.
  3. Expert advice and thought leadership: Gain valuable insights from industry leaders and HorizonIQ professionals on a wide range of topics, from cybersecurity to cloud migration.

Investing in Your Digital Future

Just as we invest in cutting-edge tools and forge partnerships with industry pioneers, BeyondIT reflects our commitment to providing you with the most up-to-date knowledge and expert guidance. We believe that an informed customer is an empowered customer, and BeyondIT is your one-stop shop for navigating the exciting complexities of the digital age.

Join Us on the Journey

BeyondIT is more than a blog–it’s a gateway to a future brimming with possibilities. We invite you to subscribe and embark on this journey with us. As you explore the vast digital frontier, HorizonIQ will be your trusted navigator, ensuring your success every step of the way.

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About Author

Sameer Aghera

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