Fluorine Fermi Boosts Monero's Defense Against Trackers

Fluorine Fermi Boosts Monero's Defense Against Network Trackers

Written by Aaron S.,

Editor-In-Chief

Last Updated: October 10, 2025

Key Takeaways

Monero’s new "Fluorine Fermi" update aims to reduce exposure to spy nodes that try to link IP addresses to blockchain activity;
The update includes a smarter peer selection method that avoids risky IP ranges and prefers safer, smaller node groups;
Alongside privacy upgrades, the update brings general fixes to improve connection stability and user experience.

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On October 9, Monero XMR $324.43 introduced a new version of its client software named "Fluorine Fermi".

According to an announcement on X, this update is designed to limit exposure to malicious activity from what the community refers to as "spy nodes".

These so-called spy nodes are harmful systems or groups of systems that try to associate IP addresses with blockchain transactions. Their purpose is to weaken the anonymity of Monero users.

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In response, the developers have made changes that help users avoid connecting to parts of the internet where these threats are more likely to exist.

The most important improvement in this release is a new method for selecting network peers. Instead of allowing connections to large blocks of IP addresses, where harmful nodes often hide, the updated software prefers smaller, more trusted groups.

Besides improving privacy, the update includes general fixes to make the software more reliable. These improvements aim to reduce crashes and connection issues, helping users maintain consistent access to the network.

Monero’s community has long taken threats to privacy seriously. To protect their activity, users often follow steps like running their own nodes, limiting who they connect to, and using special tools to mask their presence online. This latest update offers another way to protect sensitive information.

Recently, the Ethereum ETH $3,819.33 Foundation created a new team, called the "Privacy Cluster". What does the team do? Read the full story.