Firewall

Even after the adoption of network security policies and practices, unauthorized intrusion occurs. It is an attack in which attacker gets access to the system by means of different hacking and cracking techniques. Firewall is hardware-software based network security system that uses rules to control incoming and outgoing network packet. A firewall controls access to the resources of a network through a positive control model. There are various traditional firewalls like Packet Filters, Application-level Gateways and Circuit-level Gateways which has certain pros and cons. To overcome disadvantages the traditional firewall, next generation firewalls are introduced. This paper gives the empirical study of tradition firewalls, and its evolution to Next Generation firewall like NGFW, UTM, Threat focused its features and advantages. Manisha Patil | Savita Mohurle"The Empirical Study of the Evolution of the Next Generation Firewalls" Published in International Journal of Trend in...

Distributed Denial of Service (DDoS) attack is a growing issue in the Information Age. Following the rise of IPv6 and Internet of Things (IoT), these attacks are undeniably becoming more abusive. Relatively, Domain Name System (DNS) amplification attack is one of the biggest DDoS to date. The attack leverages the fact that a single DNS
request (small investment) can generate large DNS responses (amplified returns). This paper reviewed existing countermeasures and its deficiencies against DNS amplification attack that eventually lead to the need of flow-based analysis as detection approach. This paper discussed related works as well and pointed out possible directions in further research with emphasis on the application of Software-Defined
Networking (SDN) for mitigation purpose. Technically, the refinements focused on the utilization of flexible flow, immediate cache, extended flow values involving DNS
attributes, and client-side Response Rate Limiting (RRL) practice. Both flow-based
analysis and SDN are expected to play an increasingly major role in today’s rapid
networks.

The use of the Internet has increased in all areas in recent years. With the huge growth and use of the internet increasing, there have been an increase in the number of intrusions and hackers. The risk of intrusion in the network environment is serious. The basic concept of the intrusion detection system is highlighted in this report. Most of IDS' work is based on two approaches: the approach to anomaly and the approach to misuse. This paper provides a short assessment of intrusion detection taxonomy and literature. As a starting point for research in the field of intrusion detection, an extensive bibliography is provided. The purpose of this paper is to cover the analysis of various available intrusion detection tools and data mining techniques for detecting intrusions in network. A review on current trends in intrusion detection together with the study on technologies implemented by some researchers in this area is presented

Discussion and analysis of a scenario where a demo web application that acts as a profile manager is assessed from a security point of view. We will design and develop the test web application and we will perform a vulnerability assessment throughout all the technologies applied, in order to identify possible security weaknesses and exploits.

Firewalls are computer security systems that protect your office/home PCs or your network from intruders, hackers & malicious code. Firewalls protect you from offensive software that may come to reside on your systems or from prying hackers.

Este trabalho tem como escopo demonstrar através de implementação a utilização do software PacketFence para controlar o acesso de novos dispositivos (Notebook, Desktop) à infraestrutura de rede de computadores utilizando conexões Ethernet cabeadas. Para fazer esse controle o PacketFence faz uso de tecnologias open source, entre elas, o Nessus, ferramenta utilizada para fazer varreduras de computadores a procura de vulnerabilidade de softwares que comprometa a segurança dos dados que
estão armazenados no dispositivo, o FreeRadius aplicativo que faz autenticação e autorização de usuário e dispositivo para acesso a rede de computadores, banco de dados MySQL, utilizado para armazenar dados, o Snort, aplicativo que detecta tentativas de intrusão a rede, Servidor web Apache HTTPD para fornecer páginas web e Captive portal. Também serão abordados os protocolos 802.1x, 802.1q, Simple Network Manager Protocol (SNMP) e Dynamic Host Configuration Protocol (DHCP).
Nesse documento o leitor irá encontrar breve descrição das aplicações e protocolos citados e também o detalhamento da instalação, configuração e funcionalidades do PacketFence em redes cabeadas.

Abstract-Web application security is the hottest issue in the present scenario of e-business environment. Web application attacks can play havoc with the system within no time. More than 80% attacks are at application layer and almost 90% applications are vulnerable to these ...

This article paper is one of the “Most Read” in the LinkedIn Publishing platform, which has been made and provides a course background based on hands-on experiences with the requirement of Fire System Design and Analysis as part of the building built design and construction involving any facilities, which is an environmental design process and management from start to finish methodology. An introduction that will give a glimpse concerning the Fire System design within the building construction based on the client requirement and purpose of the development that explains and discuss the critical phases, elements, usage, and functions of every detail of the project. Moreover, this article talked about fire scenario that was happened in the Europe region within the two high rise building aspects due to the negligence of concerned parties and developer that caused residents fatalities and accidents drastically.
This article is an excerpt topic and edited from "Fire System Design and Analysis" approved AIUs Master Subject Curriculum Course of a research thesis submitted to the Atlantic International University School of Science and Engineering (AIU SCE USA) with a Grade of 4.00 ("A+") earned the Master of Science in Mechanical Engineering in 2010-2012 with 3.78 GPA. However, this thesis write-up is one of the sources in the Thesis Dissertation from PUP (Polytechnic University of the Philippines) Master of Science in Construction Management (MSCM). Also, a theoretical background of Ph.D. Course Thesis, “Building Fire Protection and Safety Engineering,” from the AIU SCE USA with an excellent marked “A+” (4.00) grade earned for this doctoral course subject, 2016-18 – Ph.D.in Building and Construction Engineering.

Firewalls are one of the major products in the network and Internet security arsenal. No satisfactory criterion is currently available for evaluating firewalls. This paper enumerates considerations that have to be taken into account in order to develop an appropriate and meaningful evaluation criteria, and proposes a multi-dimensional criterion for evaluating firewalls. The criterion consists of three major components: security, performance and management. The analytical results of applying the proposed criteria on Check Point's Firewall-1 show the strengths and benefits of the proposed multi-dimensional approach

NIST created the Cyber Security Framework in 2017 to serve as an implementation vehicle to address requirements of an Obama Administration Executive order.  I provided feedback to NIST on the CSF development.  I have deployed the CSF core on numerous occasions.  But, I never really understood CSF beginning to end.  Now I do after creating the attached briefing I presented to a George Mason University engineering class in late August 2021.  I will happily present anywhere else if you want me to.

RESUMEN: ​ Zentyal se define como una solución de groupware de código abierto, desarrollada como un sistema operativo linux pero compatible con clientes Microsoft. Zentyal tiene distribuciones gratuitas y de pago. La versión gratuita se distribuye como Edición de Desarrollo. Zentyal integra varios servicios de administración de red, entre los que se destacan el firewall, DHCP, VPN, DNS, entre otros. La última versión publicada del software es la versión 5.0.

FreeBSD is often used as a router or a firewall, but the vast majority of tuning guides available for this use case doesn't explain in detail how to calculate each value to be tuned. This study, after describing how to bench a router and the most important basic concepts to understand, demonstrate the benefit of tuning major parameters to obtain the best routing and firewalling performance with FreeBSD 11.1-RELEASE. This study is written by system administrators for system administrators audience: Optimisation will be done by configuration changes and using existing patches only. No kernel coding skills are needed.

High availability (HA) refers to systems that are likely to operate continuously without failure for a long time. HA can be achieved by creating a cluster of computers that act like a single system and provide continuous uptime. Several researchers have used different approaches for high availability cluster, basically active-active and active-passive cluster which leads to issues like client request congestion or overload and redundant standby systems respectively. The research creates enhancement in high availability using integrated high availability cluster (iHAC). iHAC addresses overload and redundancy by introducing efficient throughput and low latency. iHAC uses three scenarios, active active-passive, active passive-active, and active passive-passive. Model methodology is used to create an abstraction of the system where experiment is conducted to ascertain results which may have been difficult to get in real systems. The simulation tool used was Riverbed Modeler (Opnet Model...

Dalam hal pengelolaan server, biasanya administrator sistem tidak selalu harus berada dalam ruang server. Hal ini karena biasanya ruangan server dirancang agar memiliki suhu yang cukup dingin dan stabil, dimana hal itu tentu kurang baik untuk tubuh.  Sehingga  biasanya  seorang administrator menjalankan tugasnya dari luar ruang server dengan melalui aplikasi remote server. Aplikasi ini diinstal di server dan selalu listen pada port tertentu dan selanjutnya menunggu permintaan koneksi dari aplikasi client. Dengan demikian seorang  administrator  cukup melakukan proses autentikasi  ke aplikasi  tersebut  dan  jika  berhasil  maka administrator tersebut akan mendapatkan akses untuk mengelola server.
Berbagai metode maupun jumlah serangan pada suatu server semakin hari semakin meningkat. Terbukanya beberapa  port yang listen secara tidak langsung akan mengundang para attacker maupun pihak-pihak tertentu yang tidak bertanggung jawab untuk menerobos masuk ke dalam server melalui port tersebut. Hal yang sering dilakukan oleh para attacker adalah mencoba untuk mengeksploitasi berbagai aplikasi yang sedang running  melalui port yang  terbuka  pada  sisi server. Untuk  mencegah  hal-hal  yang  tidak diinginkan, biasanya  administrator akan memasang firewall dan melakukan beberapa konfigurasi yang pada intinya adalah untuk membatasi siapapun yang akan mengakses server. Terbukanya port pada server, terutama port untuk aplikasi remote server, tentu akan menjadi pusat perhatian attacker untuk dieskploitasi. Port knocking hadir sebagai salah satu metode autentikasi yang dapat digunakan untuk mengatasi masalah di atas. Metode ini memiliki kemampuan untuk menentukan siapa yang memang benar-benar berhak mengakses server, dan biasanya diimplementasikan  pada  layanan-layanan  yang  sifatnya  jarang diakses, seperti mengakses secure shell di remote server.

The principles of security threats prevent inappropriate access, modification or manipulation of data from taking place. The chapter focuses on Information security threats principle components as well as the security. The comprehensive model for information security is also discussed here very briefly. Finally, this chapter focuses on information security system and the various implementation phases. In this chapter mainly different areas are discussed such as Information Security and Critical characteristics of information in Mobile Ad-hoc Networks.

This paper describes an approach to detecting distributed denial of service (DDoS) attacks that is based on fundamentals of Information Theory, specifically Kolmogorov Complexity. A theorem derived using principles of Kolmogorov Complexity states that the joint complexity measure of random strings is lower than the sum of the complexities of the individual strings when the strings exhibit some correlation. Furthermore, the joint complexity measure varies inversely with the amount of correlation. We propose a distributed active network-based algorithm that exploits this property to correlate arbitrary traffic flows in the network to detect possible denial-of-service attacks. One of the strengths of this algorithm is that it does not require special filtering rules and hence it can be used to detect any type of DDoS attack. We implement and investigate the performance of the algorithm in an active network. Our results show that DDoS attacks can be detected in a manner that is not sensitive to legitimate background traffic.

Understanding the conceptual fundamentals of Firewall policies are the basic terms to be considered. Developing an algorithm to detect and resolve anomalies comes after. From the basic conception to complex design, this report focuses on Firewall (defense system) and its set of rules defined by system and network administrator. Intrusion is the major issue attacking various organizations and agencies to gain credentials causing high risk and loss of revenue. Any illegal packets coming from the external source verifying themselves as a legitimate client could trouble the entire network. Thus we implement Firewall to authenticate users and block unwanted traffics which don’t have access to destination. Configuring Firewall rules are much stiffer which lead to creation of anomalies. Anomalies create a high risk in network releasing loop holes and easily vulnerable to threats. Network administrator must plan the set of policies wisely to prevent such problems. In our report, we will be discussing on various aspects of anomalies with their types and relationship and produce an application through which anomalies could be detected and resolved. Furthermore on report, there will be illustrations of different entities of firewall, working program with its implementation and solidified background with future areas to cover.

Jupyter notebooks, formerly known as iPython notebooks, are widely used for data analysis and other areas of scientific computing. Notebooks can contain formatted text, images, LaTeX formulas, as well as code that can be executed, edited and executed again. A jupyter hub is a multiuser server for jupyter notebooks, and setting up a jupyter hub is a complex endeavour that involves many steps. The instructions found online for setup often have to be customized for different operating systems, and there is not one source that covers all aspects of setup. This paper describes the details of setting up a jupyter hub environment on a server running CentOS 7, and includes a discussion of lessons learned from using this system in data science classes.

Chinese authorities ordered deletion of a 4 May 2020 speech, given in Mandarin, by Deputy National Security Advisor Matthew Pottinger, from China's internet.  The decision opens a window on the Chinese party-state's practice of censorship, placing it in a long line of authoritarian states that use censorship to reinforce their rule.  How Chinese publishers trim translations of "objectional" content from foreign books provides another case study.