![]() ![]() Implementing Geo filtering on your nftables firewall can add a valuable layer of security to your network by reducing its attack surface and helping to protect against malware and other dangerous, persistent threats - but it should not be viewed as a cybersecurity cure-all. For instance, the technology could potentially block legitimate online traffic, and isn’t able to prevent targeted attacks, as criminals can easily hide their location by using servers or compromised computers in different locations to launch attacks. Geo filtering is a valuable security feature, but does have some limitations. Cutting off entire countries is quick and effective, but in many cases it makes sense to use more sophisticated IP filtering settings to either block only certain IP addresses, ranges of IPs or lists of IPs known to be malicious, or to create rules in your firewall that make exceptions and allow trusted IP addresses to access your systems. However, keep in mind that if you’re using software or online services from other countries, you may have to accept communications from these countries. If you have no reason to accept incoming online communications from certain countries, then implementing whole-country Geo filtering on your firewall may make sense. Geographic filtering enables administrators to mitigate threats to their network by blocking IP addresses associated with countries or locations where the majority of cyberattacks originate, or that they have no reason to allow traffic from. How Can Geo Filtering Enhance Firewall Security? Firewall rules can then determine what to do with each packet - accept, reject, redirect to a server with localized content, drop, or simply count the packet - based on the location of its origin or destination. Geo filtering technology enables a computer firewall to compare the source or destination IP address of a network packet to a list of location specific IP address ranges, which can be found in freely available geolocation databases such as. Geo filtering is a firewall technology that filters and blocks both incoming and outgoing network connections based on geographic location using IP addresses. This article will examine the concept of geo filtering and how it could add a valuable layer of security to your firewall, and will then explore how the Geolocation for nftables project is leveraging Open Source to provide intuitive, customizable geo filtering on Linux. The script has the built-in ability to flush and refill geo filtering sets after a database update without restarting the firewall, allowing servers to run uninterrupted without dropping established connections.” The code runs well on servers, workstations and low-power systems like Raspberry Pi. In a recent interview with LinuxSecurity researchers, the project’s lead developer Mike Baxter explained the mission of Geolocation for nftables, “I hope this project is beneficial to those who may not have the IT budget or resources to implement a commercial solution. ![]() Geolocation for nftables is a simple and flexible Bash script released in December of 2020 designed to perform automated real-time filtering using nftables firewalls based on the IP addresses for a particular region. ![]() You may be surprised that this is not only possible, but straightforward and easy, by implementing geographic filtering on your nftables firewall with Geolocation for nftables. What if you could block connections to your network in real-time from countries around the world such as Russia, China and Brazil where the majority of cyberattacks originate? What if you could redirect connections to a single network based on their origin? As you can imagine, being able to control these things would reduce the number of attack vectors on your network, improving its security. ![]()
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