background preloader

Punching holes into firewalls

Punching holes into firewalls
or "Why firewalls shouldn't be considered a ultimate weapon for network security" or "Secure TCP-into-HTTP tunnelling guide" Introduction Firewalls are heavily used to secure private networks (home or corporate). Usually, they are used to protect the network from: intrusions from outsidersmisuse from insiders In a TCP/IP environment, the typical corporate firewall configuration is to block everything (both incoming and outgoing), and give access to the internet only through a HTTP proxy. Still, this should not considered a ultimate weapon, and network administrators should not rely on the firewalls only. Encapsulation is the basis of networking. As soon as you let a single protocol out, tunelling allows to let anything go through this protocol, and thus through the firewall. This paper demonstrates how to encapsulate any TCP-based protocol (SMTP, POP3, NNTP, telnet...) into HTTP, thus bypassing the firewall protection/censorship (depending on your point of view) A word of warning: The problem Related:  hacking & cyberactivism

WikiLeaks e os conflitos no ciberespaço - Parte II 21 de dezembro de 2010 Categoria: Mundo O estabelecimento do ciberespaço como uma dimensão da guerra abre a possibilidade de uma ofensiva militar contra a rede. Por Passa Palavra Leia aqui a primeira parte deste artigo. 4. Soldado de Bronze, em Tallinn (2006) Depois da terra, oceano, ar e espaço, o ciberespaço passou a ser considerado um novo campo de guerra pelos militares. Em maio, um mês após a onda de ataques, as investigações rastrearam que esses ataques partiram da Rússia. Uma situação similar e paralela ocorreu ainda em 2008, quando a Rússia entrou em guerra contra a Geórgia e os sites do governo e da mídia desse país também foram atacados. De acordo com as investigações realizadas, ambos ataques foram organizados por russos utilizando Botnets [12]. Desde 2008, a OTAN mantém o Cooperative Cyber Defence Centre of Excellence (CCDCOE) em Tallinn, na Estônia. QG da NSA – Forte Meade, Maryland. Quatro meses antes do Cable Gate, um colunista convidado pelo Washington Post, Marc A. 5.

100 Incredible Lectures from the World's Top Scientists Posted on Thursday June 18, 2009 by Staff Writers By Sarah Russel Unless you’re enrolled at one of the best online colleges or are an elite member of the science and engineering inner circle, you’re probably left out of most of the exciting research explored by the world’s greatest scientists. But thanks to the Internet and the generosity of many universities and online colleges, you’ve now got access to the cutting edge theories and projects that are changing the world in this list below. If you’re looking for even more amazing lectures, check out our updated list for 2012 with more talks from great minds. General Let the world’s top scientists explain exactly how they do their job when you listen to these lectures. Science and Engineering From materials science to the study of thermodynamics, learn more about the science of engineering here. WTC Lecture – collapse of WTC Buildings: Steven E. Biology and Medicine Chemistry Physics and Astronomy Earth and Environment Technology Science and Business

OneLab PuTTY Download Page Home | FAQ | Feedback | Licence | Updates | Mirrors | Keys | Links | Team Download: Stable · Snapshot | Docs | Changes | Wishlist PuTTY is a free implementation of SSH and Telnet for Windows and Unix platforms, along with an xterm terminal emulator. It is written and maintained primarily by Simon Tatham. The latest version is 0.70. LEGAL WARNING: Use of PuTTY, PSCP, PSFTP and Plink is illegal in countries where encryption is outlawed. Use of the Telnet-only binary (PuTTYtel) is unrestricted by any cryptography laws. Latest news 2017-07-08 PuTTY 0.70 released, containing security and bug fixes PuTTY 0.70, released today, fixes further problems with Windows DLL hijacking, and also fixes a small number of bugs in 0.69, including broken printing support and Unicode keyboard input on Windows. 2017-04-29 PuTTY 0.69 released, containing security and bug fixes 2017-02-21 PuTTY 0.68 released, containing ECC, a 64-bit build, and security fixes 2017-01-21 Win64 builds and website redesign Site map

WikiLeaks e os conflitos no ciberespaço - Parte I 19 de dezembro de 2010 Categoria: Mundo A revelação de documentos secretos da diplomacia dos Estados Unidos abre uma batalha pela liberdade da informação. Por Passa Palavra 1. Introdução Desde o início de 2010, o governo dos Estados Unidos está sofrendo os maiores vazamentos de informação [revelação de segredos] da sua história. O Cable Gate reúne 251.287 documentos das representações diplomáticas norte-americanas do mundo inteiro. Outra diferença a ser notada é que desde o Diário de Guerra do Afeganistão, o WikiLeaks estabeleceu uma parceria com a mídia tradicional, como El País (Espanha), The Guardian (Grã-Bretanha), Der Spiegel (Alemanha), New York Times (Estados Unidos) e, no Brasil, com a Folha de S. No dia 22 de novembro, no twitter, o WikiLeaks avisou que começaria a vazar os arquivos em breve. A suposta fonte de todo esse material é o militar de Primeira Classe Bradley Manning, 23 anos. 3. A exposição e personalização foi direcionada enquanto estratégia de defesa.

Learn Anything: 100 Places to Find Free Webinars and Tutorials Many people want to learn things like how to fix their own sink or speak another language but just don't know how to find the information they need or realize that free educational materials are out there to help them learn. Lucky for them, the Internet is full of tutorials and webinars that can be a great help in learning just about anything, whether practical or academic. We've compiled a list here of 100 places you can go to find all kinds of free educational information to get you started. Find Find tutorials on hundreds of topics ranging from crafts and hobbies to education on this comprehensive tutorial collection.

PlanetLab Europe (PLE) A world-wide platform for Internet developers PlanetLab Europe is a network of open computers distributed across the world and available for the development of new network services. Already used by over 500 experimenters, it is designed to be the most realistic platform available for trial deployment and experimentation, with services such as distributed storage, network mapping, peer-to-peer systems, distributed hash tables and query processing. Hundreds of Linux systems physically distributed across the world are remotely accessible on the public Internet and available to host applications for testing in a real-life environment. Once you become a member of PlanetLab Europe, you can provision private virtual servers on any of over 1000 PlanetLab nodes. PlanetLab tutorial: Part 1: PlanetLab Basics Part 2: Getting started with PlanetLab Part 3: PlanetLab Technical Overview PlanetLab Europe datasheets and flyer now available. Alternatively, click here to register with PLE.