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All Journal International Journal of Electrical and Computer Engineering Semantik Jurnal Buana Informatika Sinkron : Jurnal dan Penelitian Teknik Informatika Jurnal RESTI (Rekayasa Sistem dan Teknologi Informasi) SemanTIK : Teknik Informasi JURNAL MEDIA INFORMATIKA BUDIDARMA Jurnal Sains dan Informatika JURNAL TEKNIK INFORMATIKA DAN SISTEM INFORMASI Technomedia Journal Jiko (Jurnal Informatika dan komputer) Indonesian Journal of Computing and Modeling International Journal of Natural Science and Engineering JURTEKSI Jurnal Informatika JIPI (Jurnal Ilmiah Penelitian dan Pembelajaran Informatika) JUSIM (Jurnal Sistem Informasi Musirawas) Building of Informatics, Technology and Science Progresif: Jurnal Ilmiah Komputer Journal of Information Systems and Informatics JUKANTI (Jurnal Pendidikan Teknologi Informasi) Jurnal JTIK (Jurnal Teknologi Informasi dan Komunikasi) Aiti: Jurnal Teknologi Informasi MEANS (Media Informasi Analisa dan Sistem) Jurnal Teknik Informatika (JUTIF) Journal of Information Technology Ampera Edutik : Jurnal Pendidikan Teknologi Informasi dan Komunikasi International Journal Software Engineering and Computer Science (IJSECS) INOVTEK Polbeng - Seri Informatika
Indrastanti Ratna Widiasari
Universitas Kristen Satya Wacana
Agriculture, Biological Sciences & Forestry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Engineering Languange, Linguistic, Communication & Media Mathematics Other

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Analisis Web Performance Load Test Setelah Menggunakan Azure WAF Studi Kasus Pada Aplikasi ERP Cristianto, Denil; Widiasari, Indrastanti R
Building of Informatics, Technology and Science (BITS) Vol 3 No 4 (2022): March 2022
Publisher : Forum Kerjasama Pendidikan Tinggi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1178.132 KB) | DOI: 10.47065/bits.v3i4.1438

Abstract

The increasing use of web applications is certainly proportional to the increase in cybersecurity attacks that occur. Many companies or agencies are less concerned about the security of the web applications that are used so that these web applications can be easily hacked. On the other hand, there are many ways to protect websites from hacker attacks, one of which is implementing waf. WAF is an application or device that has the ability to filter, monitor, and block traffic that goes to a website. The waf used in this study is a cloud-based waf, namely azure application gateway. Based on this, this study aims to discuss web performance analysis and load testing of a website after implementing waf. The tools used to test Web Performance and Load Test are GTMetrix and Pingdom Tools. With this research, it is hoped that this research can be a reference for individuals or agencies that will implement waf
Implementasi Jaringan FTTH menggunakan Ethernet Passive Optical Network (EPON) dengan Metode Splitter Ratio Riyanto, Muhamad; Widiasari, Indrastanti Ratna
SemanTIK : Teknik Informasi Vol 10, No 1 (2024):
Publisher : Informatics Engineering Department of Halu Oleo University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/semantik.v10i1.47215

Abstract

Fiber Optic sering digunakan karena kemampuan transmisi bandwidth yang besar dan biaya yang tergolong rendah, ringan, tahan terhadap gangguan elektromagnetik. Fiber to the Home (FTTH) merupakan salah satu implementasi dari teknologi transmisi Fiber Optic yang dapat mentransmisikan data dengan cepat dan stabil untuk sampai kerumah dengan menggunakan media Fiber Optic. Passive Optical Network (PON) merupakan jaringan Fiber Optic yang memiliki elemen point to multipoint yang penyaluran datanya dibagi oleh splitter ratio menjadi beberapa tujuan layanan. Splitter ratio digunakan untuk membagi jalur kabel Fiber Optic, terdiri dari satu port masukan dan beberapa port keluaran. Dengan adanya splitter, operator jaringan FTTH mampu memberikan layanan kepada pelanggan hanya dengan menggunakan satu kabel. Penelitian ini menghasilkan efisiensi dan efektivitas perancangan jaringan FTTH di Green.net Karangduren dengan menggunakan metode splitter ratio yang dipasang di setiap ODP. Implementasi jaringan FTTH di desa Karangduren menghasilkan redaman yang baik bagi pelanggan, dengan indikator warna hijau yang menunjukkan redaman yang baik. Penggunaan splitter ratio dalam perancangan jaringan FTTH memiliki beberapa keunggulan, seperti efisiensi biaya, fleksibilitas, kualitas sambungan yang baik, dam pemeliharaan yang mudah. Kata kunci; Fiber Optic, Fiber to the Home (FTTH), Passive Optical Network, Splitter Ratio
Automation of Two Ubuntu Servers with Ansible and Telegram as Notifications Wibowo, Gading Haryono; Widiasari, Indrastanti Ratna
Sinkron : jurnal dan penelitian teknik informatika Vol. 7 No. 1 (2023): Articles Research Volume 7 Issue 1, 2023
Publisher : Politeknik Ganesha Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33395/sinkron.v8i1.11856

Abstract

The purpose of this study was to determine the application of the server configuration automation system using Ansible tools on Ubuntu Server. This study describes a descriptive qualitative research that examines a problem based on what is observed through certain media. The stages of research carried out in designing Automation of Two Ubuntu Servers with Ansible and Telegram as Notifications. The results of this study display two execution results, namely the status of Success and Ended. Ended state is caused by unreacable or unconnected host. The suggestion for the further development of this research is that the application of the automation system can also be carried out on the Windows Server operating system, not only on the Ubuntu Server.
Precipitation and water discharge for internet of things based flood disaster prediction improvement Efendi, Rissal; Widiasari, Indrastanti R.
International Journal of Electrical and Computer Engineering (IJECE) Vol 14, No 6: December 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijece.v14i6.pp6773-6785

Abstract

Floods are a major global problem affect communities and businesses. For these effects to be mitigated and emergency measures to be improved, accurate prediction is essential. Conventional flood prediction models frequently fail because the models ignore important hydrological elements like water discharge and instead solely use rainfall data. This limitation was addressed by the combination of rainfall and water discharge data on internet of things (IoT)-based technologies. It focuses on analyzing historical records from flood-prone areas in Semarang using gated recurrent unit (GRU) models. The findings demonstrate how effectively the GRU model performs when rainfall and water discharge factors are taken into account, resulting in very accurate and dependable predictions of flood events. Precision, Recall, and F1-score are evaluation metrics that demonstrate the accuracy on which the model determines flood emergency statuses. This study advances flood prediction methods and highlights the value of integrating internet of things data to improve preparedness and resilience against flood disasters.
Uji kerentanan keamanan pada web Sistem Informasi Akademik Satya Wacana menggunakan metode Vulnerability Assessment Efendi, Rissal; Wahyono, Teguh; Widiasari, Indrastanti R.
AITI Vol 21 No 1 (2024)
Publisher : Fakultas Teknologi Informasi Universitas Kristen Satya Wacana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24246/aiti.v21i1.44-57

Abstract

Vulnerability assessment is a process to look for system security gaps that can cause information technology process system failure. In carrying out a vulnerability assessment there are three main stages, namely information collection, assessment and exploit using the Greybone Openvas tool with a Full Scan template on the object and several credentials provided by a website. From the vulnerability assessment process, five vulnerabilities were found on assets, namely critical risk with a few 0, high risk with a few 2, medium risk with a few 2, and low risk with a few 1. Based on the conclusions from the vulnerability analysis the website and the results of identity verification, it was concluded that the website had a few weaknesses and vulnerabilities that needed to be fixed to maintain the security and quality of the website. Corrective actions on website configuration need to be taken such as setting cookies, SSL, HTTP headers, and others. SSL/TLS services do not accurately limit the renegotiation stage of the system, making it easier for attackers to carry out Denial of Service attacks by carrying out many renegotiations in one connection.
Manajemen Bandwidth Menggunakan Hierarchical Token Bucket (HTB) (Studi Kasus: PT. Orion Cyber Internet) Simarmata, Hotman Samuel; Widiasari, Indrastanti R.
Technomedia Journal Vol 8 No 2 Special Issues (2023): Special Issue: Sistem Informasi Manajemen Dalam Menunjang Teknolog
Publisher : Pandawan Incorporation, Alphabet Incubator Universitas Raharja

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33050/tmj.v8i2SP.2078

Abstract

Internet sekarang sudah menjadi salah satu kebutuhan manusia. Oleh karena itu manajemen bandwidth saat ini menjadi hal penting terutama bagi tempat-tempat yang memiliki bandwidth yang terbatas. Manajemen bandwidth sendiri memiliki beberapa metode untuk penerapannya, penerapan metode manajemen bandwidth dilakukan berdasarkan kebutuhan user dan ketersediaan bandwidth. Tujuan dari studi ini adalah pengelolaan bandwidth dengan menerapkan metode Hierarchical Token Bucket (HTB) yang diimplementasikan di jaringan komputer PT. Orion Cyber Internet agar para user mendapatkan bandwidth secara merata dan sesuai kebutuhan. Parameter yang dipakai dalam studi ini adalah metode dari Quality of Service (QoS) yaitu packet loss, throughput, delay, dan jitter. Sebagai pembanding dalam studi ini menggunakan metode simple queue. Dalam melakukan pengujian menggunakan aplikasi wireshark. Hasil dari pengujian ini mendapatkan hasil bahwa metode HTB lebih bagus daripada metode simple queue.
IOT BASED SMART HOME SIMULATION (INTERNET OF THINGS) Ardianto, Yeheskiel Hency; Widiasari, Indrastanti Ratna
JURTEKSI (Jurnal Teknologi dan Sistem Informasi) Vol 10, No 4 (2024): September 2024
Publisher : STMIK Royal

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33330/jurteksi.v10i4.3361

Abstract

Abstract: The development of Internet of Things (IoT) technology has significantly impacted life, particularly in creating more efficient and secure smart homes. Smart homes integrate various electronic devices to enhance comfort and energy efficiency. However, cost, integration complexity, and security issues remain. This study will simulate an IoT-based smart home system to analyse and evaluate device performance before real-world implementation. The simulation method involves testing connectivity and evaluating delay and packet loss using the ping method on each device. Results show the highest delay on CCTV devices at 41.8 ms and the lowest on motion detector 2 at 32.8 ms, with 0% packet loss. According to TIPHON standards, the network is rated excellent with an index of 4. The designed smart home system demonstrates optimal performance and is feasible for implementation but requires further development in configuration using AI and machine learning technologies.            Keywords: internet of things; simulation; smart home; testing  Abstrak: Perkembangan teknologi Internet of Things (IoT) telah membawa perubahan signifikan dalam kehidupan, terutama dalam pengembangan rumah pintar (smart home) yang lebih efisien dan aman. Smart home mengintegrasikan berbagai perangkat elektronik untuk meningkatkan kenyamanan dan efisiensi energi. Meskipun demikian, tantangan seperti biaya, kompleksitas integrasi, dan isu keamanan masih ada. Penelitian ini bertujuan untuk mensimulasikan sistem smart home berbasis IoT guna menganalisis dan mengevaluasi kinerja perangkat sebelum implementasi nyata. Metode simulasi yang digunakan melibatkan pengujian konektivitas dan evaluasi delay serta packet loss dengan metode ping pada setiap perangkat. Hasil menunjukkan delay tertinggi pada perangkat CCTV sebesar 41.8 ms dan terendah pada motion detector 2 sebesar 32.8 ms, dengan packet loss 0%. Berdasarkan standar TIPHON, jaringan dinilai sangat baik dengan indeks 4. Sistem smart home yang dirancang menunjukkan kinerja optimal dan layak diimplementasikan, namun masih memerlukan pengembangan lebih lanjut dalam konfigurasi menggunakan teknologi AI dan machine learning.  Keywords: internet of things; pengujian; simulasi; smart home
Model Jaringan VLAN pada Routing IS-IS untuk Pemerintah (Studi Kasus Dinas Pemerintah Kecamatan Bringin) Arnando, Kelvin; Widiasari, Indrastanti Ratna
Jurnal JTIK (Jurnal Teknologi Informasi dan Komunikasi) Vol 9 No 2 (2025): APRIL-JUNE 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.v9i2.3293

Abstract

The current development of the internet network in the digital era has progressed very rapidly and has become a major need that cannot be abandoned, especially for the Bringin District Government Service which does not yet have a good network, so the exchange of information is less effective. Therefore, it is necessary to design a network with VLAN configuration on IS-IS routing, and carry out network simulation using GNS3. QoS testing is carried out by sending data packets using the ICMP protocol and counting the data sent. This research shows that the results of VLAN network testing on IS-IS routing at the Bringin District Government Service have optimal performance according to the TIPHON standard with 0% packet loss, 11.28 ms delay, 0.78 Mbit/s throughput, and 0 ms jitter.
Design and Implementation of Load Balancing for Quality of Service Improvement Widiasari, Indrastanti Ratna; Efendi, Rissal
Jurnal Buana Informatika Vol. 15 No. 2 (2024): Jurnal Buana Informatika, Volume 15, Nomor 02, Oktober 2024
Publisher : Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

At the Information Technology Faculty, Satya Wacana Christian University, load balancing systems are implemented where the web server serves 500 users. This is to prevent server overload or downtime during simultaneous access to the web server. Test results indicate significant differences in CPU usage, request time, and bandwidth between load balancing and single servers. The use of load balancing is more effective than relying on a single server, as evidenced by test results. The CPU usage with load balancing is significantly lower, with a difference of up to 45% compared to a single server. The request time with load balancing is also slightly better, with only 21.5ms compared to 42ms for a single server. However, the difference in bandwidth between load balancing and a single server is not very significant. The highest bandwidth recorded on a single server is 182kb/s, while with load balancing it reaches 165kb/s.
IMPLEMENTASI JARINGAN RT/RW NET DI WILAYAH RT 01 PERUMAHAN SRATEN PERMAI DENGAN METODE NETWORK DEVELOPMENT LIVE CYCLE Setiawan, Muhamad Avif; Widiasari, Indrastanti Ratna
JIPI (Jurnal Ilmiah Penelitian dan Pembelajaran Informatika) Vol 9, No 4 (2024)
Publisher : STKIP PGRI Tulungagung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29100/jipi.v9i4.5615

Abstract

Penelitian ini membahas tentang penerapan RT RW Net yang digunakan di wilayah RT 01 di Perumahan Sraten Permai dengan menggunakan perangkat mikrotik. Sulitnya mendapatkan jaringan internet dan juga membutuhkan biaya yang cukup mahal, penelitian ini dimaksudkan untuk membantu masyarakat mendapatkan internet yang murah dan mudah. Metode penelitian yang digunakan untuk penelitian ini adalah menggunakan Network Development Live Cycle (NDLC). Penggunaan mikrotik untuk RT RW Net ini juga memudahkan untuk mengkonfigurasi jaringan internet yang akan dibangun. Dalam perencanaan dalam membangun jaringan internet dilakukan juga untuk melakukan limit bandwidth agar masing masing client mendapatkan akses jaringan internet yang sama agar mendapatkan kecepatan internet yang sama dan juga adil untuk semua.
Co-Authors Aditya Indra Cahya Amanda Angreyni Regal Ardianto, Yeheskiel Hency Arnando, Kelvin Arya Pradana Bagus Pramono Bayu Edhi Setyawan Billy Hamsen Cahyaningrum, Yuliana Cahyaningtyas, Christian Christopher, William Cristianto, Denil Dian W Chandra Fra Arsandy Kusuma Sejati Fransiskus Simson Irwan Sembiring Jonathan Liando Kendek Allo, Alvin Kevin Lala, Zefanya Loudewieq Gabriel Maay, Buyung Herfandy Maitimu, Excel Barthel Manuputty, Yandri Y Marpaung, Kristian Vieri Merryana Lestari Najoan, Patrick Nikolaus Toni Prahara, Imanuel Noval Amanda Prasetia, Rega Dhiwastu Rapawuli Eko Putro Raweyai, Soni Sampari Rezky Kristian Bangun Rissal Efendi Rissal Efendi Rissal Effendi Riyanto, Muhamad Rizal Dwi Pratomo safry pasau tangdisosang Sebayang, Andreas Setiawan, Muhamad Avif Simarmata, Hotman Samuel Sufardy, Devander Benaryanta Suwijo Danu Prasetyo T. Arie Setiawan Prasida Teguh Wahyono Theopillus J. H. Wellem Theovan Gracia Stefana Putra Ulfa Septilia Permatasari Wibowo, Gading Haryono Wisnu Widi Anggoro Yessica Nataliani Yoel Chandra Eka Paksi Yonatan Surya Kristama