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Network Security

Posted: October 28, 2009 in Network Security
Tags: ,

Pendahuluan

Network Security ?

In the field of networking, the specialist area of network security consists of the provisions made in an underlying computer network infrastructure, policies adopted by the network administrator to protect the network and the network-accessible resources from unauthorized access, and consistent and continuous monitoring and measurement of its effectiveness (or lack) combined together.

Concept

Network security starts from authenticating the user, commonly with a username and a password. Since this requires just one thing besides the user name, i.e. the password which is something you ‘know’, this is sometimes termed one factor authentication. With two factor authentication something you ‘have’ is also used (e.g. a security token or ‘dongle’, an ATM card, or your mobile phone), or with three factor authentication something you ‘are’ is also used (e.g. a fingerprint or retinal scan).

Once authenticated, a firewall enforces access policies such as what services are allowed to be accessed by the network users.[1] Though effective to prevent unauthorized access, this component may fail to check potentially harmful content such as computer worms or Trojans being transmitted over the network. Anti-virus software or an intrusion prevention system (IPS)[2] help detect and inhibit the action of such malware. An anomaly-based intrusion detection system may also monitor the network and traffic for unexpected (i.e. suspicious) content or behaviour and other anomalies to protect resources, e.g. from denial of service attacks or an employee accessing files at strange times. Individual events occurring on the network may be logged for audit purposes and for later high level analysis.

Communication between two hosts using the network could be encrypted to maintain privacy.

Honeypots, essentially decoy network-accessible resources, could be deployed in a network as surveillance and early-warning tools. Techniques used by the attackers that attempt to compromise these decoy resources are studied during and after an attack to keep an eye on new exploitation techniques. Such analysis could be used to further tighten security of the actual network being protected by the honeypot.[3]

A useful summary of standard concepts and methods in network security is given by [4] in the form of an extensible ontology of network security attacks. wiki.en

Ref:

  1. ^ A Role-Based Trusted Network Provides Pervasive Security and Compliance – interview with Jayshree Ullal, senior VP of Cisco
  2. ^ Dave Dittrich, Network monitoring/Intrusion Detection Systems (IDS), University of Washington.
  3. ^ Honeypots, Honeynets
  4. ^ Simmonds, A; Sandilands, P; van Ekert, L (2004). “An Ontology for Network Security Attacks”. Lecture Notes in Computer Science 3285: 317-323.

Modul

Keamanan Sistem Jaringan Download

Algoritma Kriptografi Modern (Bagian 1) Download

Tugas

Scanning Port & IPDownload

UTS

UAS

Soal Uji Coba UAS

Jawaban Uji Coba UAS

Note:

Tools yang digunakan [Hacking Tools]

1. IP Scaner Download

2. Port Scaner Download

Pengertian /Pendahuluan

SDLCPengembangan sistem informasi sering disebut sebagai proses pengembangan sistem (System Development). Pengembangan sistem didefinisikan sebagai aktivitas untuk menghasilkan sistem informasi (berbasis komputer) untuk menyelesaikan persoalan (problem) organisasi atau memanfaatkan     kesempatan (opportunities) yang timbul.

Sebenarnya untuk menghasilkan sistem informasi tersebut terdiri dari:

System Analysis:
upaya mendapatkan gambaran bagaimana sistem bekerja dan masalah-masalah apa saja yang ada pada sistem

System Development: langkah-langkah mengembangkan sistem informasi yang baru berdasarkan gambaran cara kerja sistem dan permasalahan yang ada

Modul

Semua Materi [All Modul] Download

Data Flow Diagram [Pak Gerson]Download

Contoh Soal Perencanaan Database [Pak Gerson]Download

Tugas

UTS

UAS

Desain Antar Muka

Posted: October 26, 2009 in Desain Antarmuka
Tags: ,

Pengertian

Modul

Pertemuan Pertama [Review I]  Download IKON2

Modul Usability Download

Modul Design Download Disini

Modul Notasi Dialog dan Analisis Tugas Download Disini

Modul Prototyping Download Disini

Modul Help dan Documentasi Download Disini

Modul Teknik Evaluasi Download Disini

Tugas

Analisa Web [Mangga Dua Komputer] Download

UTS

UAS

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