Different Types Of Network Firewalls You Should Know About!

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Firewalls protect private networks from harmful traffic by third-party network or internet. It is specialized to block the traffic, not fulfilling the privacy policy or is harmful.

There are different types of firewalls specialized to do so. It includes:

  • Packet filtering firewalls
  • Circuit-level gateways
  • Stateful inspection firewalls
  • Application firewalls
  • Proxy firewalls
  • Next-generation firewalls.

A packet filtering firewall provides a perimeter security system. It deflects harmful traffic at the router. It gets data on IP address, port number, and packet type by inspecting data packets. On inspection, if the security standards are not met, the packets will not be allowed to move forward by the firewall. They process the data very quickly.

Circuit-level gateways track the TCP between packets. They do so to find out if it is a valid session or not. Traffic will depend on session policies. These firewalls do not look for the packets they are transmitting, which means malicious packets are expected to be missed.

A stateful inspection firewall looks for each packet in TCP session. It can accept/reject traffic depending on security policy and prior activity data. It has more control than packet filtering firewalls but is comparatively slower.

An application or proxy firewall filters out the traffic at the application layer. It works on origination point of traffic and looks for harmful data, policy breaching, viruses etc.

Next-generation firewalls are the latest security firewalls. They have accumulative properties of packet filtering and stateful inspection along with deep packet inspection and encrypted traffic inspection.

The upcoming firewalls are expected to be more advanced. The firewall is very much important for the secure network. To make your networks more secure, consult Logic Finders that amazingly provide these services for better infrastructure.

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How SDN is Helping the Small Businesses

All businesses either large or medium are embracing the capabilities of SDN for better flexibility and consistency. Seeing this, small businesses are also getting involved in SDN.

Basically SDN architecture was targeting the large companies and infrastructures as they need more provisioning. Then this perception changed with SDN maturity and companies like Amazon, Google and Facebook got proficient with SDN. It managed Layer 3 switch infrastructure and focussed towards the software-centric view.

Network devices have two planes: a control plane and forwarding plane for accessing and sending data respectively. These planes are joined together in a device, and multiple changes can be done via CLI if required.

Traditional network vs. SDN
Source: TechTarget

Small businesses benefitting from SDN

SDN simplifies network management task for small businesses in several ways:

Providing better visibility.

SDN is a way to provide better visibility of routing, switching, wired and wireless components. The non-technical staff can identify issues more easily.

SDN can help to abstract the networks into desired actions. For example, wireless traffic seeing the whole chain.

More secure.

The network is always vulnerable to attacks and threats. SDN works to automate the network’s provisioning. The SDN controllers account for consistency and security.


Another advantage of SDN is that it is very efficient in troubleshooting. It allows businesses to identify and mitigate the issue without any technical expertise.

Resultantly, it increases the efficiency of a business. Its centralized system enables remote monitoring even if the network is inaccessible.

SDN is simply a blessing to all infrastructures and businesses. No one can ever neglect the useful changes, it has brought to the industry. No matter your organization is big or small, if you want to progress then adopting SDN is a must.

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5G NR (New Radio) And The Networking!

Extreme data rates, low latency and high reliability all owes to 5G New Radio. The use cases for NR defined by international telecommunications union (ITU) are:

  • Enhanced mobile broadband (eMBB)
  • Ultra-reliable low-latency communications (URLLC)
  • Massive machine-type communications (mMTC)

NR is always evolving with enhancements in ultra-reliable low latency communications (URLLC) in IoT, extension of frequency to 114 GHz, extended MIMO, cellular-vehicle-to-everything (V2X), and user equipment (UE) positioning and also increasing the power efficiency.

Mobile network operators (MNOs) expect a network which can handle 5G NR advancement. MNOs can enjoy Software Defined Networking, Network Function Virtualization and Radio Access Network due to the low latency and higher throughput of 5G.

SDNs centralizes the data plane and the control plane. NFV and SDN compliments each other by decoupling and providing flexibility.

Network slicing
NFV, allows the RAN to be replaced with software-based virtual machines (VMs) for segmentation of a network into various VMs (partitioned into slices of network). These slices perform optimization for latency, throughput, and security. For instance a utility company needs to support a great number of sensors or a robotic surgery. All these need network to be sliced.

It can take place in either core network or RAN

Network slicing functions

Source: EDN

Virtualized RAN centralizes data processing. Also, 5G NR depends on factors like wider channel bandwidths, MIMO, and higher throughput by modulation schemes up to 256 QAM .

Virtualized RANs need higher-bandwidth and lower-latency. Both the RAN determines the data handling with 5G.
Mobile edge computing

MEC is an architecture moving the processing, storage, and management closer to the RAN’s edge and it supports low-latency and on-demand services. It also make the computing resources closer to the edge of the network.

It results in reduced transport latency, enabling smart infrastructure services in autonomous driving or drone traffic control which is not possible by a centralized network.
Initially in 5G, operators balance centralized processing and MEC as there always remains a trade-off between cost and performance.

Is your network 5G ready
5G is something more than just speed. It is something to bring marvelous change in your smartphones. SDN and NFV has given much support to this technology. An MNO can opt for 5G NR by refreshing gigabit performance and low-latency.

You will migrate to a virtualized platform with much advancement in MEC and slicing depending more on software. But it requires performing tests on infrastructure for verification of data plane and control plane.It is a best way to validate performance.
Try to be first in adapting these technologies and if you don’t know how then you are definitely missing something…….
Lets’ dive in this new technology with Logic Finders, where you can get a chance to know everything about 5G from the basics to advance level.

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Does Network Traffic Analytics Ensure Security?

Network traffic analysis is the latest trend and hottest demand involving ML techniques for identifying threats and manipulating a response.

Traffic data improves bandwidth and performance. But, with the new technology release, traffic analysis is being used for security purposes of the network.  It involves heuristics and other machine learning techniques for packet evaluation and identification of traffic that can be a threat.The special sensors collect these data packets to provide insight of the upcoming time and provides a clear vision about the happenings. The tools access data and form a traffic pattern. The ML algorithms alert back of all the harmful packets.

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Network Analytics Graph

source: allot.com

Network traffic analytics tools examine east-west traffic by flow parsing. All parameters are thean traversed.

Network analytics tools can also be used for monitoring of layers 2 to 7. They reveal the communicating devices and the volume of data being transferred. In this way, behavioural patterns are deduced.

But, right now the focus of network analysis is towards identification of threats. Threat management services and tools can allow for better activities in a network.

For the mitigation of threats, incident-response services are used. But, there are many enterprises which do not automated responses. Instead, they mechanize the steps towards security by blocking some of the domains.

However, the trend of Network Analytics is really prevailing. I mean who wants to risk its network? If you also think the same, then go for the mitigation techniques right away.

No worries at all, Logic Finder will guide you about all these techniques in its machine learning course.

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A Roadmap Towards Lower Latency-5G

5G offers many competitive advantages and among them one is the lower latency. There is seen an evolution in the slot-based framework.
Jas we know the case that 3G and 4G coexist, same is with 4G and 5G and their infrastructure and edge devices are going to be dual mode. It simply eases the transition.
Technologies in Release 15 have:

  • OFDM-based air interface to support the diverse spectrum
  • slot-based framework which enables low latency
  • advanced channel coding for supporting large data blocks
  • massive MIMO that allows for increased coverage and capacity
  • millimeter wave (mmWave) for more higher throughput

We have seen almost none discussing the slot-based framework in 5G- New Radio. It refers to 5G and G together. It adjusts latency and quality of service (QoS) as required.

LTE allows 15 kilohertz subcarrier spacing, and 1 millisecond slots for twenty symbols. Whereas, 5G allows 15 kHz subcarrier with a 1 millisecond slot for 14 symbols.

Talking about 5G it has another option too (actually a lot), that includes 30 kHz subcarrier, 500 microsecond slot plus “mini-slot,” 60 kiloHertz with a 250 microsecond slot, and 120 kiloHertz with a 125 microsecond slot.

The 120 kHz allows most effective millimeter wave communications.
The mini-slot means more symbols in one slot. An ordinary slot carries only one symbol whereas a mini-slot can carry upto seven. It is a great push to IoT applications.

The TDD slots’ structure is variable and additional headers can be included.

Channel coding plays a very important role and low latency for quick decoding. The best choice standards for working in 5G are multi-edge low density parity check (LDPC).MIMO also plays its imp part for spectrum reuse and all these things together makes better communication.

mmWave spectrum along with MIMO and beamforming, allows spectrum at a very high rate
Dual connectiviand the ability to leverage 4G and 5G at same time will allow switching between two which means dual connectivity and more capacity.

The user plane is on 5G NR, as on transitioning from LTE to 5G while control is provided with LTE enhanced packet core (EPC).

        Source: Qualcomm

IoT applications will really get benefit from low latency. For instance use of resource spread multiple access (RSMA) technology. Other applications include vehicle-to-vehicle communications; integrated access and backhaul; and non-terrestrial (satellite) 5G NR.

Commercially talking, it is still testing and prototyping. For instance Qualcomm, doing 5G NR interoperability testing with AT&T, China Mobile, Docomo, SK Telecom, Sprint, Telstra, Verizon, Vodafone, Ericsson, Nokia, ZTE, and some other companies are working on 5G NR technology.

                                                 Source: Qualcomm
Adopt this technology, before it is too late. Be in the race along with these top companies and let the success find you. If you don’t know where to start then we are always here to help you.

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