VeePN Blog VeePN Blog
  • What is VPN?
    • How does a VPN work?
    • Access Content
    • Unblock Websites
    • Unblock Games
    • Streaming Media
    • Streaming Music
    • Unblock Netflix
    • Internet Privacy
    • Anonymous IP
    • Conceal Identity
    • Prevent Tracking
    • Save Money
    • Online Security
    • VPN Encryption
    • What’s my IP
    • Hide your IP
  • Apps
    • All Apps
    • iOS
    • Android
    • Mac
    • Windows
    • Linux
    • TV
    • Router
    • Chrome
    • Firefox
  • Features
    • All Features
    • VPN Servers
    • Double VPN
    • No Log VPN
    • Kill Switch
    • NetGuard
    • Extra Features
  • Pricing
  • Support
Get VeePN Now
Digital identity Safe surfing Mobile security Wireless security Big brother
More categories
Good to know Online threats Entertainment Hackerwatch
Digital identity Safe surfing
More
Mobile security Wireless security Big brother Good to know Online threats Entertainment Hackerwatch
Digital identity Safe surfing Mobile security Wireless security Big brother Good to know Online threats Entertainment Hackerwatch
Get VeePN Now
Blog Wireless security
Wireless security
VeePN Research Lab • Upd: Feb 10, 2022
Quick Navigation
1. What is SPI?
2. The definition of SPI firewall
3. How does the SPI firewall work?

How Does the SPI Firewall Operates & Definition?

We are protected from various viruses and attacks coming via the web with the help of firewall tools. Nevertheless, not each of them is equally safe and powerful. You might choose the SPI firewall because it is one of the best options. Let’s figure out whether it is good and how it works.

What is SPI?

SPI is the abbreviation of stateful packet inspection. It is a kind of technology, checking if incoming information packets correspond to active connections and monitoring them. Then, it decides if to deny or grant permission for them in order to pass the firewall.

Tools transmit information in packets. Hence, the receiving end might process them more straightforward. The single larger information unit can be divided into a few packets. Nevertheless, hackers may compromise such packets in order to harm a receiving server. Therefore, the SPI firewall ensures if such packets correspond to the established connection and are legitimate. The packets that are not related to a known connection are discarded. So the breach possibility is minimized.

The definition of SPI firewall

The SPI firewall is protecting you through the examination of incoming packets against the existing connections.

The examination of the stateless firewall is based on static values like destination or source addresses. The packet’s connection traffic is not taken into account. The same set of rules is applied for various packets, and there is no data about its connection. It is impossible to customize these firewalls to close and open connections. They are also unable to detect if packets are coming from the legitimate IP and don’t authenticate packets. Therefore, they are less safe if compared to the SPI firewalls. However, they are faster.

How does the SPI firewall work?

The SPI firewall might remember each connection’s attributes and utilize this data to determine the packet’s validity. It stores the data it obtains through the examination of the establishing rules and packets. Therefore, it views the packet’s broader context, not only the contents of it.

Thus, the SPI firewall should not inspect each packet thoroughly. Therefore, it operates quicker if compared to the DPI (deep packet inspection). The latter is deconstructing the packets in order to check if they include any kind of malicious code and if they are correctly formed. The DPI is utilized for many targets such as internet censorship, data mining, security, or network management. It gives a certain level of security with the help of its speed.

Knowledge is power, VeePN is freedom
Get VeePN Now
30-day money-back guarantee
Written by VeePN Research Lab VeePN Research Lab is dedicated to provide you latest posts about internet security and privacy.
Related Posts
Does using VPN protect you on public Wi-Fi?
Does using VPN protect you on public Wi-Fi?
Safe surfing 7 min read

Using VPN on Public Wi-Fi: Will It Protect You?

Desperately need to connect to the internet but you run out of data? We can imagine the relief when you finally spot that sought-after public Wi-Fi network. But…have you ever wondered whether using public Wi-Fi is safe? In case you haven’t, we’ve got some bad news — connecting to public Wi-Fi without taking necessary precautions is just a no-go. Would…

VeePN Research Lab
May 18
Setting up VPN on iPhone: A Quick Guide
Setting up VPN on iPhone: A Quick Guide
Mobile security 8 min read

Setting up VPN on iPhone: A Quick Guide

Thinking about getting a VPN for your iOS? We get it — security of your devices is a top priority. And a VPN is the perfect tool for guarding your online presence and bypassing geo-blocks. In this article, we’ll cover what else VPN has to offer you and, more importantly, how to set up a VPN on an iPhone in…

VeePN Research Lab
May 18
Good to know 8 min read

ExpressVPN vs NordVPN vs VeePN: How to Choose the Best from the Best

Hunting for a VPN? Then you’ve most likely heard of ExpressVPN and NordVPN — these two VPN providers stand out as the industry titans, backing up the online security and safety front. However, that’s not all the VPN market has to offer. A younger product, VeePN is certainly an appealing option as well. Curious to see how the three stack…

VeePN Research Lab
May 16
© 2022 VeePN. All Rights Reserved.