Issues Caused by Firewalls within an Enterprise



Firewalls are schemes that offer network safety by filtering outgoing and incoming network traffic using specific agreed user-defined rules. Overall, a firewall intends to minimize or eradicate the existence of unsolicited network communications but permitting all genuine communication to stream easily. In a lot of server infrastructure, firewalls offered an important layer of safety and coupled with further methods; avert intruders from getting into one’s server in mischievous ways. However, wrongly managed firewalls generate among the paramount business threats in any enterprise and are often detected when it too late.

Evaluating the Danger of the Firewall Plan

With networks getting more complicated and the continuous growth of firewall rule-sets, it is progressively hard to quantify and recognize the danger that is presented by excessively tolerant or misconfigured firewall rules. The main provider to firewall policy dangers is the absence of the correct appreciation of precisely of the firewall performance at any specific moment (Hachana et al., 2013). Even when the traffic is streaming and applications are functioning, this does not guarantee that the network cannot be exposed superfluously. The information technology department ought to continuously think the adoptions they are making and the risks posed by those choices in future. Everything that happens that has a relationship with the firewall policies can either increase risks or better security. A lot of experienced firewall administrators make authentic errors and need proper visibility to understand where they stand.

Upholding Enhanced Firewall Rule-Sets

One of the most critical firewall management functions is to maintain a clear set of firewall guidelines.  However, most enterprises struggle with it. Unmanageable rule-sets can be both a technical irritation and a creator of business risks such as unwanted VPN tunnels and open ports. Such contradictory rules might create a massive quantity of needless complexity and back door entry points (Lemke, & Readshaw, 2015). Moreover, bloated rule-sets considerably confuse the process of auditing, which usually includes an assessment of every rule and how it relates to business rationalization, creating unwanted business costs and wasting the IT valuable time. Firewall rules such as shadowed and unused rules, unattached objects and expired rules can create a lot of problems. Such errors make the enterprise take ad hoc firewalls recertification projects, especially if a business has many firewalls from numerous vendors. Such complications contribute to poor accountability, undetected network breaches and a lack of visibility.

Management of Firewall Changes

In information technology, things are continually in a state of fluidity and managing every one of those fluctuations can cause a business a lot of problems. When it comes to firewalls, it is not easy to manage these changes by evasion. Nevertheless, if these changes are not properly managed, they can lead to grave risks that can include blocking of authentic traffic, the whole system going offline and enterprises being hacked. Many factors contribute to these problems. The absence of official policies as pertains to firewall policies or rule-sets are usually mixed up with official information security guidelines (Rhodes-Ousley, 2013). It is important to distinguish the dissimilarity and make sure that the business has a formal policy for change administration that comprises all the firewalls in its scope. Communication between the IT staff should be clear as it is a severe obstruction to the success of the network security. Good communication can eliminate situations of out-of-band alterations that can result in firewall catastrophes.


Enterprises that trivialize firewall management normally encounter immense drawbacks to the business when something goes wrong. Since IT systems are in place to the business success, everything should be done to set it up and maintain the business achievements. The IT department must be able to gain an understanding of their network and consistently manage it on a continuing basis.

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Hachana, S., Cuppens, F., Cuppens-Boulahia, N., Atluri, V., & Morucci, S. (2013, December). Policy mining: a bottom-up approach toward a model based firewall management. In International Conference on Information Systems Security (pp. 133-147). Springer, Berlin, Heidelberg.

Lemke, W. A., & Readshaw, N. I. (2015). U.S. Patent No. 9,088,543. Washington, DC: U.S. Patent and Trademark Office.

Rhodes-Ousley, M. (2013). Information security the complete reference. McGraw Hill Professional.

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