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Sri Ngudi Wahyuni
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The Indonesian Journal of Computer Science Research
Published by Hemispheres Press
ISSN : -     EISSN : 29639174     DOI : https://doi.org/10.59095/ijcsr
Core Subject : Science,
Computer Science & IT
The Indonesian Journal of Computer Science Research (IJCSR) adalah jurnal yang memuat naskah ilmiah dari peneliti, akademisi, maupun praktisi, berupa hasil penelitian, tinjauan pustaka ( literature review ) dan/atau bentuk karya tulis ilmiah lainnya, yang khusus mengkaji bidang Ilmu Komputer antara lain sebagai berikut : Computational and algorithm Numerical Methods and Algorithms Autonomic Computing Big Data Computer and Network Architecture Cloud Computing Cluster Computing Workflow Design and Practice Data Mining Artificial Intelligence Web-Based Computing Scientific Visualization Computer Graphics Pattern Recognition Virtual Reality Augmented Reality Geometric Modeling Industry 4.0 Bioinformatics Digital Forensic
Arjuna Subject : Ilmu Komputer (semua kategori) - Ilmu Komputer (Lain-Lain)
Articles 91 Documents
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Implementation of NFtables and Fail2ban on Linux Server for Adaptive Defense Firewall Development Prasetyo purnomo; Juarisman; Irma Suwarning Widyastuty; Eko Tri Anggono
The Indonesian Journal of Computer Science Research Vol. 5 No. 2 (2026): Juli
Publisher : Hemispheres Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59095/ijcsr.v5i2.288

Abstract

Linux server security management today faces the challenges of command-line configuration complexity and slow response to automated attacks. This research aims to develop a prototype of an Adaptive Defense Firewall web application that integrates firewalld, nftables, and fail2ban centrally. The importance of this research lies in the provision of visual management that makes it easier for administrators to mitigate network intrusions in real-time. The novelty offered is the Adaptive Defense Levelsfeature (Safe, Moderate, Aggressive, Under Attack profile), which is able to dynamically adjust fail2ban mitigation parameters and kernel-level blocking by nftables. The methodology uses a prototype approach that includes needs analysis, architectural design, React.js and Python implementation, and penetration testing. The test dataset was generated from a controlled attack simulation using the Hydra program for brute-force on SSH and ftp services, as well as Nmap for port scanning. The results of the study showed that the system effectively detected and blocked all the IP addresses of the attacker. The blocking response time was recorded at1,030 seconds for SSH, 0.301 seconds for FTP, and 0.492 seconds for port scanning, with an average increase in CPU resources of 2.8%–6.1% and RAM resources of 49.5%.

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