Search results for: nat-traversal-for-voip

Nortel Guide to VPN Routing for Security and VoIP

Author : James Edwards
File Size : 87.59 MB
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Here's your handbook to Nortel VPN Router If you're a beginning-to-intermediate-level networking professional, this guide lays the groundwork you need to establish and manage your network with VPN Router. Everything is here-hardware, software, laboratory set-ups, real-world examples, and, most importantly, advice gleaned from the authors' first-hand experiences. From understanding the equipment to deployment strategies, management and administration, authentication, and security issues, you'll gain a working knowledge of VPN Router. You will explore tunneling protocols, VoIP, troubleshooting, and exercises to help you apply the Nortel VPN Router in your own environment. This book prepares you to handle the project and provides a resource for future reference. Manage the complexities of Nortel's VPN Router Review the newest networking standards Become acquainted with all the tools in the Nortel VPN Router portfolio, and apply them to your organization's needs Deploy a VPN Router in a Small Office or Home Office (SOHO) network or a large corporate network Learn to apply security features such as a stateful firewall, Network Address Translation (NAT), port forwarding, and user and Branch Office Tunnel (BOT) termination Establish security for VoIP and roaming wireless connections Explore the Nortel VPN Client software, supported platforms, installation and configuration information, and basic VPN Client concepts Maximize the effectiveness of your Nortel VPN Router solution

InfoWorld

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File Size : 88.9 MB
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InfoWorld is targeted to Senior IT professionals. Content is segmented into Channels and Topic Centers. InfoWorld also celebrates people, companies, and projects.

VoIP Hacks

Author : Theodore Wallingford
File Size : 60.51 MB
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Voice over Internet Protocol (VoIP) is gaining a lot of attention these days, as more companies and individuals switch from standard telephone service to phone service via the Internet. The reason is simple: A single network to carry voice and data is easier to scale, maintain, and administer. As an added bonus, it's also cheaper, because VoIP is free of the endless government regulations and tariffs imposed upon phone companies. VoIP is simply overflowing with hack potential, and VoIP Hacks is the practical guide from O'Reilly that presents these possibilities to you. It provides dozens of hands-on projects for building a VoIP network, showing you how to tweak and customize a multitude of exciting things to get the job done. Along the way, you'll also learn which standards and practices work best for your particular environment. Among the quick and clever solutions showcased in the book are those for: gauging VoIP readiness on an enterprise network using SIP, H.323, and other signaling specifications providing low-layer security in a VoIP environment employing IP hardphones, analog telephone adapters, and softPBX servers dealing with and avoiding the most common VoIP deployment mistakes In reality, VoIP Hacks contains only a small subset of VoIP knowledge-enough to serve as an introduction to the world of VoIP and teach you how to use it to save money, be more productive, or just impress your friends. If you love to tinker and optimize, this is the one technology, and the one book, you must investigate.

VoIP

Author : Samrat Ganguly
File Size : 31.55 MB
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Understand how new network technologies impact VoIP! Voice over Internet Protocol (VoIP) is revolutionizing the way people communicate – both in the corporate world and in personal life. The enormous success of VoIP has led to its adoption in a wide range of networking technologies. Each network technology has its unique features and poses distinct challenges for the performance of VoIP. VoIP: Wireless, P2P and New Enterprise Voice over IPdescribes the issues arising in the deployment of VoIP in an emerging heterogeneous network environment. Along with a brief overview of the concepts, protocols, algorithms, and equipment involved in realizing VoIP, this book focuses on two areas: quality and performance issues in deploying VoIP over various network settings, and the new mechanisms and protocols in these emerging networks to assist the deployment of VoIP. VoIP: Wireless, P2P and New Enterprise Voice over IP: Discusses the basics of VoIP, VoIP codecs and VoIP Protocols including SIP and H.323. Details new technologies such as P2P technology, VoWiFi, WiMax, and 3G Networks. Explains the QoS issues arising from deploying VoIP using the new technologies. Solves the performance issues that arise when VoIP is deployed over different network technologies. This book is an invaluable resource for professional network engineers, designers, managers, researchers, decision makers and project managers overseeing VoIP implementations. Market analysts, consultants, and those studying advanced undergraduate and graduate courses on data, voice and multimedia communications will also find this book insightful.

How to Cheat at VoIP Security

Author : Thomas Porter, CISSP, CCNP, CCDA, CCS
File Size : 24.59 MB
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The Perfect Reference for the Multitasked SysAdmin This is the perfect guide if VoIP engineering is not your specialty. It is the perfect introduction to VoIP security, covering exploit tools and how they can be used against VoIP (Voice over IP) systems. It gives the basics of attack methodologies used against the SIP and H.323 protocols as well as VoIP network infrastructure. * VoIP Isn’t Just Another Data Protocol IP telephony uses the Internet architecture, similar to any other data application. However, from a security administrator’s point of view, VoIP is different. Understand why. * What Functionality Is Gained, Degraded, or Enhanced on a VoIP Network? Find out the issues associated with quality of service, emergency 911 service, and the major benefits of VoIP. * The Security Considerations of Voice Messaging Learn about the types of security attacks you need to protect against within your voice messaging system. * Understand the VoIP Communication Architectures Understand what PSTN is and what it does as well as the H.323 protocol specification, and SIP Functions and features. * The Support Protocols of VoIP Environments Learn the services, features, and security implications of DNS, TFTP, HTTP, SNMP, DHCP, RSVP, SDP, and SKINNY. * Securing the Whole VoIP Infrastructure Learn about Denial-of-Service attacks, VoIP service disruption, call hijacking and interception, H.323-specific attacks, and SIP-specific attacks. * Authorized Access Begins with Authentication Learn the methods of verifying both the user identity and the device identity in order to secure a VoIP network. * Understand Skype Security Skype does not log a history like other VoIP solutions; understand the implications of conducting business over a Skype connection. * Get the Basics of a VoIP Security Policy Use a sample VoIP Security Policy to understand the components of a complete policy. Provides system administrators with hundreds of tips, tricks, and scripts to complete administration tasks more quickly and efficiently Short on theory, history, and technical data that ultimately is not helpful in performing their jobs Avoid the time drains associated with securing VoIP

IP Telephony

Author : Olivier Hersent
File Size : 43.13 MB
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IP (internet protocol) Telephony, enabled by softswitches, is going to usher in a new era in telecommunications. By putting voice and data over one IP network, operators can enjoy lower costs and create new, revenue-generating "multimedia" services. This valuable reference offers a comprehensive overview of the technology behind IP telephony and offers essential information to network engineers, designers and managers who need to understand the protocols and explore the issues involved in migrating the existing telephony infrastructure to an IP-based real time communication service. Drawing on extensive research and practical development experience in VoIP from its earliest stages, the authors give access to all the relevant standards and cutting-edge techniques in a single resource. IP Telephony: Deploying Voice-over-IP Protocols: Assumes a working knowledge of IP and networking and addresses the technical aspects of real-time communication over IP. Presents a high level overview of packet media transport technologies, covering all the major VoIP protocols – SIP, H323 and MGCP Details specific strategies to design services for public networks where endpoints cannot be trusted and can be behind firewalls. Explores the problems that may arise from incomplete protocol implementations, or architectures optimized for private networks which fail in a public environment. This amply illustrated, state-of-the art reference tool will be an invaluable resource for all those involved in the practical deployment of VoIP technology.

Telecommunications

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File Size : 67.22 MB
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Network Magazine

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File Size : 34.28 MB
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Converged Multimedia Networks

Author : Juliet Bates
File Size : 54.91 MB
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&Quot;New technologies are re-writing the business cases and cost models upon which telephony has been based for years. The fast "always on" Broadband Internet is a key driver, pushing forward and enabling the delivery of multimedia applications in all types of networks.". "Service Providers want to reduce costs by converging new IP services, existing data services and traditional telephony services onto the same core network, placing expectations on network performance. Converged Multimedia Networks focuses on enabling the synergistic combination of voice, data and video on to one network and the new challenges this will present in telecommunications."--BOOK JACKET.

Migrating to IPv6

Author : Marc Blanchet
File Size : 56.24 MB
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"Migrating to IPv6: provides a complete up-to-date, in-depth, and accessible practical guide to IPv6 ; demonstrates the theory with practical and generic examples and major implementation configurations, such as Windows, FreeBSD, Linux, Solaris, Cisco, Juniper and Hexago ; provides a comprehensive reference to key data structures and packet formats ; summarizes topics in tabulated and graphical form to give fast acess to information ; heavily illustrated with over 200 figures ; offers an accompanying website with extra coverage of specific topics, information on additional protocols and specifications, and updates on new features." -- back cover.

Internet Communications Using SIP

Author : Henry Sinnreich
File Size : 52.49 MB
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"This book is like a good tour guide.It doesn't just describe themajor attractions; you share in the history, spirit, language, andculture of the place." --Henning Schulzrinne, Professor, Columbia University Since its birth in 1996, Session Initiation Protocol (SIP) hasgrown up. As a richer, much more robust technology, SIP today isfully capable of supporting the communication systems that powerour twenty-first century work and life. This second edition handbook has been revamped to cover the neweststandards, services, and products. You'll find the latest on SIPusage beyond VoIP, including Presence, instant messaging (IM),mobility, and emergency services, as well as peer-to-peer SIPapplications, quality-of-service, and security issues--everythingyou need to build and deploy today's SIP services. This book will help you * Work with SIP in Presence and event-based communications * Handle SIP-based application-level mobility issues * Develop applications to facilitate communications access forusers with disabilities * Set up Internet-based emergency services * Explore how peer-to-peer SIP systems may change VoIP * Understand the critical importance of Internet transparency * Identify relevant standards and specifications * Handle potential quality-of-service and security problems

Voice Data

Author :
File Size : 86.94 MB
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23rd DASC

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File Size : 77.10 MB
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Hacking Exposed Linux

Author : ISECOM
File Size : 54.68 MB
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The Latest Linux Security Solutions This authoritative guide will help you secure your Linux network--whether you use Linux as a desktop OS, for Internet services, for telecommunications, or for wireless services. Completely rewritten the ISECOM way, Hacking Exposed Linux, Third Edition provides the most up-to-date coverage available from a large team of topic-focused experts. The book is based on the latest ISECOM security research and shows you, in full detail, how to lock out intruders and defend your Linux systems against catastrophic attacks. Secure Linux by using attacks and countermeasures from the latest OSSTMM research Follow attack techniques of PSTN, ISDN, and PSDN over Linux Harden VoIP, Bluetooth, RF, RFID, and IR devices on Linux Block Linux signal jamming, cloning, and eavesdropping attacks Apply Trusted Computing and cryptography tools for your best defense Fix vulnerabilities in DNS, SMTP, and Web 2.0 services Prevent SPAM, Trojan, phishing, DoS, and DDoS exploits Find and repair errors in C code with static analysis and Hoare Logic

Understanding Voice Over IP Security

Author : Alan B. Johnston
File Size : 67.81 MB
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VoIP (voice over IP) networks are currently being deployed by enterprises, governments, and service providers around the globe. Today, the hottest topic with engineers in the field is how to secure these networks. The book teaches practitioners how to design a highly secure VoIP network, explains Internet security basics, such as attack types and methods, and more.

The Cook Report on Internet NREN

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File Size : 72.71 MB
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File Size : 88.4 MB
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Global Sources Telecom Products

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File Size : 81.62 MB
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Cisco PIX Firewalls

Author : Richard Deal
File Size : 56.86 MB
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Secure your mission-critical networks with the #1 leading firewall and this definitive guide. Featuring in-depth coverage of installation, configuration, and maintenance this book will show you how to protect your data from unauthorized users and hackers.

The NAT Handbook

Author : Bill Dutcher
File Size : 79.49 MB
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To use or not to use NAT? If you're a network manager or administrator eager to embrace network address translation (NAT) as a security and connectivity solution, yet are wary of its temperamental reputation, Bill Dutcher's roadmap to NAT strategy is for you. Drawing on his practical addressing experience at one of the world's largest ISPs, Dutcher provides all the information you need to evaluate NAT's suitability for your network, implement and manage it, and justify its use.You'll find clear explanations of NAT techniques, advantages and disadvantages, as well as how to deploy it with different technologies-from routers, firewalls, and proxies to VPNs. The book includes two detailed case studies demonstrating how to implement NAT on a firewall in order to move your network to private addressing and how to use NAT to balance the load on a group of servers. Other essential topics include: * How NAT works to translate IP addresses from private to public domains * NAT solutions in connectivity, routing, load balancing, and security * Why NAT interferes with certain applications and how to overcome these problems * Static or dynamic NAT-which is the right method for your situation * The effects of NAT on DNS services and how to make them work together * How NAT works in VPN environments and with VPN security techniques * The future of NAT and the public address crisis Networking Council Books put technology into perspective for decision-makers who need an implementation strategy, a vendor and outsourcing strategy, and a product and design strategy. The Council of series advisors is comprised of three of the most influential leaders of the networking community.