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All Journal Jurnal Mantik Enrichment : Journal of Management Login : Jurnal Teknologi Komputer International Journal of Basic and Applied Science
Onno Widodo Purbo
Institut Teknologi Tangerang Selatan
Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Languange, Linguistic, Communication & Media Physics

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Ubuntu Linux Server Security Analysis and Simulation With Port Knocking & Iptable Onno Widodo Purbo
International Journal of Basic and Applied Science Vol. 8 No. 2 (2019): September: Basic and Applied Science
Publisher : Institute of Computer Science

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Abstract

Computer network security is very important to maintain the confidentiality of data and information contained on the server. This data and information is only intended for administrators and users who have the right to access it through the service port. Leaving an important port open is a fatal mistake that can result in an attack on the server. The existence of Linux as an operating system kernel developed with a copyright or opensource model, computer networks using Linux servers are able to manage all internet services, including routers, database servers, proxy servers and FTP servers, in addition to the distributions. also easy to find in the market. One of them is ubuntu, ubuntu is one of the distributions that has been used by many people because Ubuntu has a user-friendly interface and many developers and is supported by a very large community. The method used in this study is the method of observation, interview and design of the Linux Ubuntu iptables operating system security, and the results of this study explain that the use of Iptables configuration on the Ubuntu Linux operating system can be done on a LAN and Wifi cable connection, as long as all clients are on the same class then the Iptables configuration can block client access to the server and can be done the other way around, namely blocking server access to the client. By using the accept setting, this system can also reject certain IP addresses or ports, in addition to accepting other connections. If you want to reject all connections and want to specify what connections you want to do manually, then you have to change the default setting from chain to drop. This method can only be useful for servers that have sensitive information, and only use the same IP address to connect to that server.
Design of Computer Network Monitoring System Based on Andorid, SNMP and Dude Onno Widodo Purbo
Login : Jurnal Teknologi Komputer Vol. 14 No. 1 (2020): Login : Jurnal Teknologi Komputer, Edition June 2020
Publisher : Sean Institute

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Abstract

As the size and number of network devices increases, the problems on the network will become more complex, this of course requires continuous monitoring of all network devices to ensure service availability. There are many difficulties faced by network administrators if they have to monitor the entire network with regard to performance, analysis and control of some components manually, especially if the network is growing. In this study, the focus of the problem developed is to determine the design of a network monitoring system based on Android, SNMP and the dude system, and the results of this study explain that the Network Management System (NMS) is an implementation of the FCAPS (Fault, Configuration, Accounting, Performance and Security) where the standard used is the Simple Network Management Protocol. The error categories that are informed on this system are errors when there is a connectivity failure on the network, CPU load increases, RAM usage starts to get high, and hard disk usage starts to get full. From the research results obtained, the Network Management System (NMS) application that was built can provide error information and solutions to network admins if an error occurs on the network. The design and implementation of an NMS application is an effective solution in finding and finding errors in a network, so that repairs or early handling can be carried out so that these problems do not result in a decrease in performance on computer devices.
Development and Quality Analysis of Web-Based Information Systems Onno Widodo Purbo
Jurnal Mantik Vol. 5 No. 3 (2021): November: Manajemen, Teknologi Informatika dan Komunikasi (Mantik)
Publisher : Institute of Computer Science (IOCS)

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With theThis study aims to develop a web-based seminar management information system and determine the quality level of the developed web-based seminar management information system, while the research method used in this study is Research and Development (R&D) with a waterfall development model that refers to software engineering principles. The stages that are passed are communication (communication), planning (planning), modeling (modeling), construction (construction), and distribution (deployment). Software quality analysis is carried out by adopting the ISO 25010 standard, namely aspects of functional suitability, performance efficiency, compatibility, usability, reliability, security, maintainability, and portability. The results of this study are 1) the seminar management information system was built using the PHP programming language and the Postgre database. The frameworks used are CodeIgniter and Admin LTE (Bootstrap). This information system has 7 user levels, namely administrator, committee (committee), reviewer, main speaker (presenter), second speaker (non-presenter), participant (audience), and visitor (guest). 2) the results of the analysis of software quality by adopting the ISO 25010 standard are as follows (1) function suitability aspects with 100% success; (2) the aspect of performance efficiency obtained a Yslow score of 92.97 (grade A); (3) the compatibility aspect can run well on the 4 tested web mails (4) the usability aspect obtained a raw SUS score of 73.00, acceptability ranges with acceptable results, grade scale with C results, and adjective ratings with good results (5) reliability aspects with 100% result; (6) security aspect with the result that the security vulnerability is at level 1 (low); (7) the maintainability aspect with the results of the maintainability index 90.81 (high category) (8) the portability aspect can run well on the 5 web browsers tested.
A Systematic Analysis: Website Development using Codeigniter and Laravel Framework Onno Widodo Purbo
Enrichment : Journal of Management Vol. 12 No. 1 (2021): November: Management Science
Publisher : Institute of Computer Science (IOCS)

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Abstract

The use of the website as one of the most influential means of communication in various human activities has been so widespread with a low cost factor, the website is often functioned as a medium for storing data and information using certain topics, besides that the website is also a collection of web pages that related to each other on the web. In general, there are several programming languages that are used to create website applications. such as, HTML (Hyper Text Markup Language), PHP (PHP Hypertext Preprocessor), CSS (Cascading Style Sheet), Javascript, Mysql, and jquery. The CodeIgniter is an open or open source application based on the PHP framework with the MVC model or also commonly called the Model View Controller which is used to build a dynamic website using PHP code. CodeIgniter helps make it easier for developers or developers to be able to create a website-based application very quickly and quickly. In this study, analysis and comparison of the accuracy of preventing SQL injection attacks is carried out on the CodeIgniter framework and the Laravel framework. In the CodeIgniter framework, the escaping query function is used to prevent SQL injection attacks. Meanwhile, the Laravel framework uses the loquent ORM function to prevent SQL injection attacks. The Codeigniter and Laravel frameworks have different time and speed performance results. Codeigniter has a higher average time and speed than Laravel. In the average time value, Codeigniter has a greater time duration than Laravel with a difference of 4.2 ms and in the average speed value, Codeigniter is still superior with a difference of 40.08 Kbit/s from Laravel.
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