During October 2025, B. Arrierg focused on backend development and system administration for the YunoHost/yunohost repository, addressing a deployment reliability issue related to firewall configuration. They enhanced firewall.py to safely handle non-default SSH ports by implementing existence checks before accessing each port’s open status, ensuring the configuration process would not fail if custom ports were missing from firewall.xml. This Python-based solution reduced deployment errors and support overhead for users with custom SSH setups. While the work addressed a single bug rather than introducing new features, it demonstrated careful attention to edge cases and improved the robustness of automated deployment workflows.