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All Journal Bulletin of Electrical Engineering and Informatics Syntax Literate: Jurnal Ilmiah Indonesia ILKOM Jurnal Ilmiah JURNAL PENDIDIKAN TAMBUSAI JURIKOM (Jurnal Riset Komputer) JIPI (Jurnal Ilmiah Penelitian dan Pembelajaran Informatika) Jutisi: Jurnal Ilmiah Teknik Informatika dan Sistem Informasi Jurnal JTIK (Jurnal Teknologi Informasi dan Komunikasi) JATI (Jurnal Mahasiswa Teknik Informatika) Aiti: Jurnal Teknologi Informasi Jurnal Teknik Informatika (JUTIF) Jurnal Pendidikan dan Teknologi Indonesia Jurnal Indonesia : Manajemen Informatika dan Komunikasi International Journal Software Engineering and Computer Science (IJSECS) IT-Explore: Jurnal Penerapan Teknologi Informasi dan Komunikasi Jurnal Informatika: Jurnal Pengembangan IT Jurnal Pendidikan Teknologi Informasi (JUKANTI) Jurnal Indonesia : Manajemen Informatika dan Komunikasi Jurnal DIMASTIK
Dian Widiyanto Chandra
Universitas Kristen Satya Wacana
Humanities Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Social Sciences Other

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Analisis Keamanan DHCP Menggunakan RADIUS Accounting Elisa Stefano Franli Purun; Dian Widiyanto Chandra
Jurnal JTIK (Jurnal Teknologi Informasi dan Komunikasi) Vol 9 No 3 (2025): JULI-SEPTEMBER 2025
Publisher : Lembaga Otonom Lembaga Informasi dan Riset Indonesia (KITA INFO dan RISET)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35870/jtik.v9i3.3667

Abstract

Every computer needs and must have an IP Address to connect with other computer network users, the IP Address will be automatically distributed to network users using the Router as a DHCP Server. In addition to DHCP, the Router has a DHCP Accounting service that can improve network security with AAA and RADIUS Server features that can be implemented with Freeradius. DHCP Accounting has accounting capabilities for secure START and STOP message transmission, but the flash memory capacity on the C2691 router is around 32 MB, making the DHCP Accounting service not run optimally if it has many users. Using MySQL as a database can be a solution to this problem. When using the DHCP Accounting feature, data from DHCP Accounting will be sent and centralized on Freeradius. Accounting data centralized on Freeradius will be stored using a MySQL database so that the available storage space will be much larger and can accommodate more data from DHCP Accounting, as well as monitoring the network so as to improve network security for users.
Response Time pada Penggunaan AdGuard Home di Container Mikrotik Rizky Bagus Pratama; Dian Widiyanto Chandra
Jurnal JTIK (Jurnal Teknologi Informasi dan Komunikasi) Vol 9 No 3 (2025): JULI-SEPTEMBER 2025
Publisher : Lembaga Otonom Lembaga Informasi dan Riset Indonesia (KITA INFO dan RISET)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35870/jtik.v9i3.3810

Abstract

DNS-based ad blocking is used to increase website access efficiency by reducing unnecessary elements. This research analyzes the effect of using AdGuard Home in the MikroTik container on response time, delay and data transfer  when accessing website. This research used an experimental method, with 30 tests before and after the implementation of AdGuard Home. Google DevTools was used to measure response time and data transfer , while Wireshark was used to measure delay. The results show that response time decreased by 36.38% from 78.46 ms to 49.91 ms, and data transfer  decreased by 42.25% from 7.1 MB to 4.1 MB, indicating an increase in network efficiency. However, the delay increased by 12.3% from 256.9 ms to 288.5 ms, due to additional latency in the DNS filtering process. Thus, this research proves that AdGuard Home in the MikroTik container can increase website access efficiency by speeding up response time and reducing data transfer , but increasing delay. Further optimization is needed to reduce the impact of delays to maintain an optimal user experience.
PEMANFAATAN SKRIP ADAPTIF BERBASIS PYTHON DAN SCAPY UNTUK MENYAMARKAN AKTIVITAS PORT SCANNING TERHADAP IDS SURICATA Junior Silambi; Dian Widiyanto Chandra
Jurnal Pendidikan Teknologi Informasi (JUKANTI) Vol 8 No 2 (2025): JURNAL PENDIDIKAN TEKNOLOGI INFORMASI (JUKANTI) EDISI NOPEMBER 2025
Publisher : Universitas Citra Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37792/jukanti.v8i2.1894

Abstract

ABSTRAK Sistem Deteksi Intrusi (IDS) berperan penting dalam mendeteksi aktivitas berbahaya pada jaringan, namun efektivitasnya sering kali terganggu oleh teknik pemindaian yang mampu menyamarkan lalu lintas berbahaya. Penelitian ini mengembangkan skrip pemindaian adaptif berbasis Python dengan pustaka Scapy untuk menguji ketahanan IDS Suricata terhadap aktivitas port scanning. Pengujian dilakukan dalam lingkungan virtual dengan membandingkan pemindaian konvensional menggunakan Nmap dan skrip adaptif yang dikembangkan. Hasil menunjukkan bahwa skrip adaptif memiliki akurasi yang sama dengan Nmap dalam mengidentifikasi port terbuka, namun tidak memicu alert pada Suricata. Temuan ini menunjukkan bahwa pendekatan adaptif sederhana dapat secara efektif menghindari deteksi IDS berbasis signature. Penelitian ini menawarkan pendekatan alternatif yang ringan dan efisien untuk menguji keandalan sistem deteksi intrusi modern.Kata kunci : Keamanan jaringan, Pemindaian adaptif, Pemindaian port, Sistem Deteksi Intrusi, Suricata, Stealth scan. ABSTRACT Intrusion Detection Systems (IDS) are crucial for identifying malicious network activities, yet their effectiveness is often challenged by stealth scanning techniques. This study develops an adaptive port scanning script using Python and the Scapy library to evaluate the resilience of the Suricata IDS against scanning activities. Experiments were conducted in a virtualized environment comparing conventional Nmap scanning and the proposed adaptive script. Results show that the adaptive script achieved equal accuracy in detecting open ports while generating no alerts on Suricata. These findings demonstrate that a simple adaptive approach can effectively evade signature-based IDS detection. This research contributes a lightweight and efficient alternative for testing the robustness of modern intrusion detection systems.Keywords: Network security, Intrusion Detection System, Suricata, Port scanning, Adaptive scanning, Stealth scan.
STIMULASI NUMERASI PRAKONSEPTUAL ANAK USIA 4–5 TAHUN MELALUI GAME BERBASIS WEB UNTUK PENGENALAN JUMLAH DAN POLA BILANGAN Willson Mangoki; Anton Hermawan; Krismiyati; Hanita Yulia; Adriyanto Juliastomo Gundo; Rissal Efendi; Angela Atik Setiyanti; Charitas Fibriani; Yessica Nataliani; Erwien Christianto; Indrastanti Ratna Widiasari; Theophilus Wellem; Hendry; Dian Widiyanto Chandra; Danny Manongga
Jurnal DIMASTIK Vol. 4 No. 2 (2026): Juli
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/dimastik.v4i2.14113

Abstract

Kegiatan pengabdian kepada masyarakat ini bertujuan untuk mengenalkan konsep numerasi awal kepada anak usia 4–5 tahun melalui game berbasis web. Kegiatan dilaksanakan di TK Kristen 1 Satya Wacana Salatiga melalui tiga tahapan, yaitu persiapan, pelaksanaan, dan evaluasi. Tahap pelaksanaan dilakukan dalam dua sesi, yaitu pengenalan perangkat komputer dan pembelajaran numerasi menggunakan game berbasis web seperti Color by Number, Find the Number, Number Matching, Complete the Missing Number, dan Connect the Dots. Evaluasi dilakukan secara observasional dengan fokus pada keterlibatan anak, pengenalan perangkat komputer, dan pemahaman numerasi. Hasil menunjukkan bahwa anak memiliki antusiasme tinggi, mengenal perangkat komputer secara terbatas, serta lebih mudah memahami konsep angka melalui pendekatan gamifikasi. Pendampingan oleh guru dan mahasiswa berperan penting dalam keberhasilan kegiatan.
Performance Analysis of Oracle Database 23ai on SELECT Queries and VIEW Statements Under Intensive Iterations Yosafat Stephen Suryadarma; Dian Widiyanto Chandra
International Journal Software Engineering and Computer Science (IJSECS) Vol. 6 No. 3 (2026): DECEMBER 2026
Publisher : Lembaga Komunitas Informasi Teknologi Aceh (KITA), Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35870/ijsecs.v6i3.8351

Abstract

The rapid growth of data volume demands efficient data management techniques, where appropriate query writing strategies become a crucial factor in maintaining system performance. This study aimed to analyze the performance of SELECT and VIEW commands on Oracle Database 23ai, specifically under intensive benchmarking involving thousands of iterations and massive workloads. An experimental quantitative method was implemented using a Java-based application utilizing the Operating System and Hardware Information (OSHI) library to monitor system resource usage in real time. Testing was conducted on a simulation dataset generating 40,000 rows of joined query results derived from a 40,000-row orders table and a 10,000-row customers table (~10.44 MB), with workload variations ranging from 10 to 10,000 iterations. Performance metrics evaluated included response time as well as CPU, RAM, and disk utilization. The results demonstrated that the SELECT command achieved superior performance at low iteration scales (10–100 iterations) with faster response times. Conversely, the VIEW command demonstrated more optimal execution at high iteration scales (1,000–10,000 iterations), yielding lower average execution times than SELECT. In terms of hardware utilization, VIEW consistently maintained more efficient RAM management across all iteration levels. The performance stability of both commands was governed by the database buffer cache mechanism and the operational transition from hard parse to soft parse after the initial execution phase. This study concludes that selecting between SELECT and VIEW must strictly account for the execution scale: SELECT is recommended for low-scale queries requiring immediate response, whereas VIEW provides a more sustainable solution for enterprise systems executing repetitive, large-scale workloads.
Co-Authors Abyarake Adiyoga Adriyanto Juliastomo Gundo Albert Lionel Angela Atik Setiyanti Anton Hermawan Auliya, Kharisma Xena Bagas Haryanto Charitas Fibriani Danny Manongga Dicky Anggara Sendiyono Elisa Stefano Franli Purun Erwien Christianto Hanita Yulia Haryanto, Bagas Hendry Indrastanti Ratna Widiasari Joshua, Ivan Junior Silambi Krismiyati Kristoko Dwi Hartomo Laurensius Phillipus Ramawijaya Laurentius Kuncoro Probo Saputra, Laurentius Kuncoro Probo Lilik Husein Efendi Mesakh Herdian Pamungkas Mila Chrismawati Paseleng Odi Pramadika Paulus Miki Resa Gumilang Rahmadyanto, Eko Putra Rhenaldo Delfi Nugraha Rissal Efendi Rizky Bagus Pratama Rulof Baltwin Tallane Samuel Nugraha Sebastian, Danny Sopaheluwakan, Christian Ronaldo Sri Yulianto Joko Prasetyo Suryasatriya Trihandaru Sutarto Wijono Theophilus Wellem Willson Mangoki Winarko, Edi Yessica Nataliani Yosafat Stephen Suryadarma Yosefhin Rayaruna Yungka