Linux Networking
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Master Thesis
Master's Programme in Computer Network Engineering, 60 credits MASTER Connect street light control devices in a secure network THESIS Andreas Kostoulas, Efstathios Lykouropoulos, Zainab Jumaa Network security, 15 credits Halmstad 2015-02-16 “Connect street light control devices in a secure network” Master’s Thesis in Computer Network engineering 2014 Authors: Andreas Kostoulas, Efstathios Lykouropoulos, Zainab Jumaa Supervisor: Alexey Vinel Examiner: Tony Larsson Preface This thesis is submitted in partial fulfilment of the requirements for a Master’s Degree in Computer Network Engineering at the Department of Information Science - Computer and Electrical Engineering, at University of Halmstad, Sweden. The research - implementation described herein was conducted under the supervision of Professor Alexey Vinel and in cooperation with Greinon engineering. This was a challenging trip with both ups and downs but accompanied by an extend team of experts, always willing to coach, sponsor, help and motivate us. For this we would like to thank them. We would like to thank our parents and family for their financial and motivational support, although distance between us was more than 1500 kilometres. Last but not least we would like to thank our fellow researchers and friends on our department for useful discussions, comments, suggestions, thoughts and also creative and fun moments we spend together. i Abstract Wireless communications is a constantly progressing technology in network engineering society, creating an environment full of opportunities that are targeting in financial growth, quality of life and humans prosperity. Wireless security is the science that has as a goal to provide safe data communication between authorized users and prevent unauthorized users from gaining access, deny access, damage or counterfeit data in a wireless environment. -
N2N: a Layer Two Peer-To-Peer VPN
N2N: A Layer Two Peer-to-Peer VPN Luca Deri1, Richard Andrews2 ntop.org, Pisa, Italy1 Symstream Technologies, Melbourne, Australia2 {deri, andrews}@ntop.org Abstract. The Internet was originally designed as a flat data network delivering a multitude of protocols and services between equal peers. Currently, after an explosive growth fostered by enormous and heterogeneous economic interests, it has become a constrained network severely enforcing client-server communication where addressing plans, packet routing, security policies and users’ reachability are almost entirely managed and limited by access providers. From the user’s perspective, the Internet is not an open transport system, but rather a telephony-like communication medium for content consumption. This paper describes the design and implementation of a new type of peer-to- peer virtual private network that can allow users to overcome some of these limitations. N2N users can create and manage their own secure and geographically distributed overlay network without the need for central administration, typical of most virtual private network systems. Keywords: Virtual private network, peer-to-peer, network overlay. 1. Motivation and Scope of Work Irony pervades many pages of history, and computing history is no exception. Once personal computing had won the market battle against mainframe-based computing, the commercial evolution of the Internet in the nineties stepped the computing world back to a substantially rigid client-server scheme. While it is true that the today’s Internet serves as a good transport system for supplying a plethora of data interchange services, virtually all of them are delivered by a client-server model, whether they are centralised or distributed, pay-per-use or virtually free [1]. -
AWS Site-To-Site VPN User Guide AWS Site-To-Site VPN User Guide
AWS Site-to-Site VPN User Guide AWS Site-to-Site VPN User Guide AWS Site-to-Site VPN: User Guide Copyright © Amazon Web Services, Inc. and/or its affiliates. All rights reserved. Amazon's trademarks and trade dress may not be used in connection with any product or service that is not Amazon's, in any manner that is likely to cause confusion among customers, or in any manner that disparages or discredits Amazon. All other trademarks not owned by Amazon are the property of their respective owners, who may or may not be affiliated with, connected to, or sponsored by Amazon. AWS Site-to-Site VPN User Guide Table of Contents What is Site-to-Site VPN ..................................................................................................................... 1 Concepts ................................................................................................................................... 1 Working with Site-to-Site VPN ..................................................................................................... 1 Site-to-Site VPN limitations ......................................................................................................... 2 Pricing ...................................................................................................................................... 2 How AWS Site-to-Site VPN works ........................................................................................................ 3 Site-to-Site VPN Components ..................................................................................................... -
Building Ipv6 Based Tunneling Mechanisms for Voip Security
WK,QWHUQDWLRQDO0XOWL&RQIHUHQFHRQ6\VWHPV6LJQDOV 'HYLFHV Building IPv6 Based Tunneling Mechanisms for VoIP Security Amzari J. Ghazali, Waleed Al-Nuaimy, Ali Al-Ataby, Majid A. Al-Taee Department of Electrical Engineering and Electronics University of Liverpool, UK e-mail: {amzari.ghazali, wax, ali.ataby, altaeem}@liv.ac.uk Abstract—Internet protocol version 6 (IPv6) was such as Toredo, 6to4 and manual configuration [4]. developed to resolve the IPv4 address exhaustion Despite the benefits of using IPv6, there are still problem and support new features. However, IPv6 still challenges and obstacles in implementing and comprises some defectiveness of IPv4 protocol such as practically using IPv6 VoIP [5]. The issues of the multimedia security. This paper presents IPv6-based transition from the current IPv4 network to IPv6 as tunneling mechanisms for securing Voice over Internet Protocol (VoIP) network traffic using OpenSwan IPSec well as VoIP performance for both IP versions need (site-to-site). IPSec with Triple Data Encryption to be assessed and compared. Algorithm (3DES) is used to create a Virtual Private Evaluation of VoIP performance with IPSec in Network (VPN) on top of existing physical networks. IPv4, IPv6 and 6to4 networks using Teredo for NAT Secure communication mechanisms can therefore be provided for data and control information transmitted traversal in a test LAN was previously reported in between networks. Secure VoIP-oriented mechanisms [6]. The testbed used softphones to setup calls, and on VPN IPv6 have been designed, implemented and background traffic was generated to create congestion tested successfully using open source approaches. The on the links and routers. The results demonstrated the performance of the IPv6 VoIP network is assessed feasibility of using a single Linux box to handle experimentally in terms of several performance metrics IPSec, 6to4 and NAT processing, and it was found including jitter, throughput and packet loss rate. -
CIS Ubuntu Linux 18.04 LTS Benchmark
CIS Ubuntu Linux 18.04 LTS Benchmark v1.0.0 - 08-13-2018 Terms of Use Please see the below link for our current terms of use: https://www.cisecurity.org/cis-securesuite/cis-securesuite-membership-terms-of-use/ 1 | P a g e Table of Contents Terms of Use ........................................................................................................................................................... 1 Overview ............................................................................................................................................................... 12 Intended Audience ........................................................................................................................................ 12 Consensus Guidance ..................................................................................................................................... 13 Typographical Conventions ...................................................................................................................... 14 Scoring Information ..................................................................................................................................... 14 Profile Definitions ......................................................................................................................................... 15 Acknowledgements ...................................................................................................................................... 17 Recommendations ............................................................................................................................................ -
CS670: Network Security
Cristina Nita-Rotaru CS670: Network security IPsec. TLS. Sources 1. Many slides courtesy of Christo Wilson and Wil Robertson 2. IPSec Key management based on slides from B. LaMacchia 3. Analysis of the HTTPS Certificate Ecosystem, IMC 2013: https://jhalderm.com/pub/papers/https-imc13.pdf 4. Analysis of SSL certificate reissues and revocations in the wake of Heartbleed, IMC 2014: http://www.ccs.neu.edu/home/cbw/pdf/imc254-zhang.pdf 2 IPSec; TLS 1: Protecting IP: IPsec OSI/ISO Model Application Application Presentation Presentation Session Session Transport Transport Network Network Data Link Data Link Physical Layer Physical Layer 4 IPSec; TLS IPsec design goals } Design philosophy: applications cannot be trusted to implement end-to-end security properly and security should be built into the network itself } Transparent to applications (below transport layer ) } Goal: Facilitate direct IP connectivity between sensitive hosts through untrusted networks } It is designed to be extremely flexible } Different crypto algorithms and key exchange supported } Different security services compositions } Different granularities of protection 5 IPSec; TLS Security goals } IPsec provides: } access control } integrity } data origin authentication } rejection of replayed packets } confidentiality } IETF IPSEC Working Group } Documented in RFCs and Internet drafts 6 IPSec; TLS Security and deployment mechanisms } Operates based on security associations } Deployment: } Transport-mode: encapsulates an upper-layer protocol (e.g. TCP or UDP) and preapends an -
Internet Telephony PBX System IPX-2200/IPX-2500
Internet Telephony PBX System IPX-2200/IPX-2500 Internet Telephony PBX System IPX-2200 IPX-2500 1 Internet Telephony PBX System IPX-2200/IPX-2500 Copyright Copyright (C) 2016 PLANET Technology Corp. All rights reserved. The products and programs described in this User’s Manual are licensed products of PLANET Technology. This User’s Manual contains proprietary information protected by copyright, and this User’s Manual and all accompanying hardware, software, and documentation are copyrighted. No part of this User’s Manual may be copied, photocopied, reproduced, translated, or reduced to any electronic medium or machine-readable form by any means by electronic or mechanical including photocopying, recording, or information storage and retrieval systems, for any purpose other than the purchaser's personal use, and without the prior written permission of PLANET Technology. Disclaimer PLANET Technology does not warrant that the hardware will work properly in all environments and applications, and makes no warranty and representation, either implied or expressed, with respect to the quality, performance, merchantability, or fitness for a particular purpose. PLANET has made every effort to ensure that this User’s Manual is accurate; PLANET disclaims liability for any inaccuracies or omissions that may have occurred. Information in this User’s Manual is subject to change without notice and does not represent a commitment on the part of PLANET. PLANET assumes no responsibility for any inaccuracies that may be contained in this User’s Manual. PLANET makes no commitment to update or keep current the information in this User’s Manual, and reserves the right to make improvements to this User’s Manual and/or to the products described in this User’s Manual, at any time without notice. -
FIPS 140-2 Security Policy
Red Hat Enterprise Linux 6.2 Openswan Cryptographic Module v2.0 FIPS 140-2 Security Policy version 1.1 Last Update: 2012-11-13 Red Hat Enterprise Linux 6.2 Openswan Cryptographic Module version 2.0 FIPS 140-2 Security Policy Contents 1 Cryptographic Module Specification .................................................................................................... .................. 3 1.1 Description of Module ............................................................................................................. .................. ... 3 1.2 Description of Approved Mode .......................................................................................................... ............ 4 1.3 Cryptographic Module Boundary ......................................................................................... ......................... 5 1.3.1 Hardware Block Diagram ................................................................................................................. .......... 6 1.3.2 Software Block Diagram .......................................................................................................... ................... 7 1.4 Red Hat Enterprise Linux 6.2 Cryptographic Modules and FIPS 140-2 Certification ......................... .......... 7 1.4.1 Platforms ............................................................................................................................... ............. ........ 8 1.4.2 FIPS Approved Mode ....................................................................................................................... -
Virtual Private Networks for Peer-To-Peer Infrastructures
Technische Universit¨atDarmstadt Department of Computer Science Prof. Dr. Michael Waidner Virtual Private Networks for Peer-to-Peer Infrastructures Diploma Thesis Submitted by Hiro Dudani <[email protected]> on 2012-11-30 Supervisor: Dipl.-Inform. Nicolai Kuntze In cooperation with: Fraunhofer SIT f¨urPapa ii Ehrenw¨ortlicheErkl¨arung(Affidavit) Hiermit versichere ich, die vorliegende Diplomarbeit ohne Hilfe Dritter und nur mit den angegebenen Quellen und Hilfsmitteln angefertigt zu haben. Alle Stellen, die aus den Quellen entnommen wurden, sind als solche kenntlich gemacht worden. Diese Arbeit hat in gleicher oder ¨ahnlicher Form noch keiner Pr¨ufungsbeh¨ordevorgelegen. Hiro Dudani Neu-Isenburg, am 29.11.2012 iii Abstract The Nanodatacenters project aims to complement the paradigm of existing centralized server farms with a high number of small storage and communication devices located at the edges of the network. Utilizing previously unused resources like broadband internet access bandwith and idling set-top boxes, these nodes are able to host applications from different content providers offering various kinds of services, such as Video on Demand or online gaming, to end users. This setting does pose particular security challenges. As the devices operate under physical control of the end users, their integrity has be ensured and must be able to be verified by the network. This is achieved through the functionality of Trusted Com- puting. Additionally, the domains of the different content providers have to be isolated in such a way that an attacker cannot use one of them as a foothold to compromise or snoop on the operation of the network or another isolated domain. -
Bohrende Fragen Wireguard
01/2018 VPN mit Wireguard aufsetzen Titelthema Bohrende Fragen Wireguard 38 Wer ein Virtual Private Network einrichten möchte, kämpft oftmals mit einer nicht ganz simplen Konfiguration. Wireguard verspricht, dass der Tunnelbau auch einfacher und flinker gelingen kann. Falko Benthin www.linux-magazin.de Quelltext und setzt auf starke Verschlüs- selungsalgorithmen, wofür Donenfeld Trevor Perrins Noise Protocol Framework [9] ins Boot nimmt. Für Zertifikate setzt das Wireguard-Protokoll auf Ed25519, für den Schlüsselaustausch auf Curve25519 (ECDHE) und für den Datentransport auf Chacha20-poly1305. Wireguard unterstützt allerdings nur eine kryptografische Suite, die sich je- doch bei Problemen ohne Weiteres aus- tauschen lässt. Anwender müssen ihre Verschlüsselungs-Suite also nicht mehr aus verschiedenen Chiffren selbst zusam- menbasteln. Das reduziert die Komple- xität und vermindert das Risiko von Si- cherheitslücken. Wireguard arbeitet aus © Péter Gudella, 123RF © Péter Sicht des Administrators zustandslos und bringt einen integrierten Schutz gegen VPNs (Virtual Private Networks) gelten In freien Wildbahn treffen Admins Wire- Denial-of-Service-Attacken mit. als sichere Nummer, wenn es darum guard bislang noch eher selten an. Das geht, das Home Office mit dem Firmen- dürfte vor allem daran liegen, dass das Installation und netz, Firmensitze mit der Zentrale oder Projekt noch nicht im offiziellen Linux- Inbetriebnahme Geschäftsreisende mit ihrer Kundenda- Kernel steckt und aktuell nur für Linux tenbank zu verbinden. Privatnutzer ver- und OS X verfügbar ist. Daneben feh- Die Repositories zahlreicher Distributio- wenden VPNs, um beispielsweise sicher len Sicherheits-Audits und das Protokoll nen bieten Wireguard bereits an, sodass über das Internet auf die heimische Wet- kann sich noch ändern. Experimentierfreudige es leicht mit Hilfe terstation mit angeschlossenem Daten- Trotzdem haben es manche VPN-Provi- der entsprechenden Paketverwaltung in- bankserver zuzugreifen. -
Evolution of the Transport Layer Security As Internet Security Protocol: Impact, Improvements and Extent
Norberto Novoa Torres, et. al. International Journal of Engineering Research and Applications www.ijera.com ISSN: 2248-9622, Vol. 10, Issue 11, (Series-II) November 2020, pp. 27-34 RESEARCH ARTICLE OPEN ACCESS Evolution Of The Transport Layer Security As Internet Security Protocol: Impact, Improvements And Extent. Johana Alejandra Mendoza Aguilera*, Norberto Novoa Torres** *(Engineering Department, Universidad Distrital Francisco José de Caldas, Facultad Tecnologica, Bogotá D.C. – Colombia. ** (Engineering Department, Universidad Distrital Francisco José de Caldas, Facultad Tecnologica, Bogotá D.C. – Colombia. ABSTRACT Although, it presents the use of SSL and TLS as protection mechanisms of communication trough encryption in data transportation making it been the most used crucial service, like messaging, financial transactions, etc., At the same time, it becomes in an attack target through its different versions which they have managed to be successful because of different methods. Making the protocol to evolve rapidly in its implementation modes and present improvements by means of hybrid solutions with the aim to solve those found security breaches or to give power to other services. In this document it is presented an analysis of these affirmations, managing to determine how safe the protocol is at the moment and how it prepares to the future. Keywords – Comunication, Safe protocols, Security, SSL, TLS. --------------------------------------------------------------------------------------------------------------------------------------- Date of Submission: 06-11-2020 Date of Acceptance: 19-11-2020 --------------------------------------------------------------------------------------------------------------------------------------- has been done until now. Or, if it is planned to I. INTRODUCTION include improvements that keep it situating as one of Nowadays, technology presents high the best solutions talking about information and safe advantages ahead of the challenges of security communications it refers. -
N2N: a Layer Two Peer-To-Peer VPN
N2N: A Layer Two Peer-to-Peer VPN Luca Deri1 and Richard Andrews2 1 ntop.org, Pisa, Italy 2 Symstream Technologies, Melbourne, Australia {deri,andrews}@ntop.org Abstract. The Internet was originally designed as a flat data network delivering a multitude of protocols and services between equal peers. Currently, after an explosive growth fostered by enormous and heterogeneous economic interests, it has become a constrained network severely enforcing client-server communication where addressing plans, packet routing, security policies and users’ reachability are almost entirely managed and limited by access providers. From the user’s perspective, the Internet is not an open transport system, but rather a telephony-like communication medium for content consumption. This paper describes the design and implementation of a new type of peer- to-peer virtual private network that can allow users to overcome some of these limitations. N2N users can create and manage their own secure and geographically distributed overlay network without the need for central administration, typical of most virtual private network systems. Keywords: Virtual private network, peer-to-peer, network overlay. 1 Motivation and Scope of Work Irony pervades many pages of history, and computing history is no exception. Once personal computing had won the market battle against mainframe-based computing, the commercial evolution of the Internet in the nineties stepped the computing world back to a substantially rigid client-server scheme. While it is true that the today’s Internet serves as a good transport system for supplying a plethora of data interchange services, virtually all of them are delivered by a client-server model, whether they are centralised or distributed, pay-per-use or virtually free [1].