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Peer-to-Peer Connectivity Using Firewall and Network Address Translator Traversal

White Paper Network Address Translators (NATs) and Firewalls, also collectively called middleboxes, create problems for establishing connections in peer-to-peer (P2P) networks: They limit the outbound connections to the Internet, do not allow incoming... [10 Jul 2008]

NAT Traversal in VPNs

White Paper NAT traversal is the mechanism that enables encrypted and authenticated Virtual Private Network (VPN) communication to pass through Network Address Translation devices (NATs). A complete NAT traversal solution must enable two computers behind... [03 Jul 2008]

Traversal of IP Voice and Video Data Through Firewalls and NATs

White Paper Almost all these IP networks deploy Firewalls and/or NAT devices, for security unfortunately, the inherent characteristics of Multimedia over IP protocols are in conflict with most current mechanisms employed by Firewall and NATS, resulting in... [30 Jun 2008]

NAT and Firewall Traversal Technical Report

White Paper While NATs and Firewalls provide numerous benefits to the customer, they also create numerous challenges for service providers seeking to offer seamless communication services to applications located behind the customer's NAT/Firewall device. [25 Jun 2008]

Implementation and Performance Study of a New NAT/Firewall Signaling Protocol

White Paper This new protocol allows end hosts to signal along a path to configure NATs and firewalls according to the data flow needs. The NAT/Firewall NSIS Signaling Layer Protocol (NAT/Firewall NSLP) is a path-coupled signaling protocol for explicit Network... [25 Jun 2008]

Traversing Firewalls and NATs With Voice and Video Over IP

Unfortunately, the ability to capitalize on IP communications systems has been severely delayed because nearly all corporate networks have firewall and Network Address Translation devices (NATs) that effectively block IP voice and video calls. [03 Jun 2008]

Traversing Firewalls and NATs With Voice and Video Over IP

White Paper Unfortunately, the ability to capitalize on IP communications systems has been severely delayed because nearly all corporate networks have firewall and Network Address Translation devices (NATs) that effectively block IP voice and video calls. [03 Jun 2008]

NAT/Firewall Traversal: Issues and Solutions

White Paper Network Address Translators (NATs) and Firewalls are increasingly used in all type of networks because of various reasons. However, NATs and firewalls are limiting some kind of communications and they are known to cause problems for applications... [31 May 2008]

Path-Coupled Signaling for NAT/Firewall Traversal

White Paper This, in the general case, prevents Firewalls and NATs from allowing or routing them, and communication becomes impossible. Complex protocols tend to negotiate secondary flows on the application layer. [31 May 2008]

An Analysis of the Skype Peer-to-Peer Internet Telephony Protocol

White Paper Skype claims that it can work almost seamlessly across NATs and firewalls and has better voice quality than the MSN and Yahoo IM applications. Skype is a peer-to-peer VoIP client developed by KaZaa. It encrypts calls end-to-end, and stores user... [26 Apr 2008]

Explicit Mechanisms for Controlling NAT/Firewall Systems Dynamically

White Paper Together with many security enhancements, however, the use of NATs/Firewalls has raised a number of new issues and problems. Most of them related to the complex NAT/Firewall traversal problem, where applications and services are blocked to connect... [11 Apr 2008]

Touring the Internet in a TCP Sidecar

White Paper The combined approach mitigates problems associated with traceroute-based topology discovery, including abuse reports, spurious edge inference from multi-path routing, unresolved IP aliases, long network timeouts, and link discovery behind NATs... [26 Dec 2007]

Understanding the Behavior of TCP for Realtime CBR Workloads

White Paper This is motivated by the friendliness of NATs and firewalls towards TCP as opposed to UDP as well as by recent improvements in Internet's bandwidth and loss rates. This paper examines the feasibility of sending real-time CBR workloads over TCP. [06 Nov 2007]

NUTSS: A SIP-Based Approach to UDP and TCP Network Connectivity

White Paper So far, this work has been limited to UDP because of the assumed impossibility of establishing TCP connections through NAT, and because of the difficulty of predicting port assignments on certain common types of NATs. [06 Nov 2007]

NATBLASTER: Establishing TCP Connections Between Hosts Behind NATs

White Paper The authors are able to create direct TCP connections between two hosts which are both located behind typical NATs designed for small networks. Firewalls and Network Address Translation (NAT) devices are becoming increasingly prevalent, and they... [30 Oct 2007]

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