You are here: silicon.com > Resources > White Papers > Networking and Communications > Network Technologies > TCP - IP

TCP - IP White Papers

Ignoring the Great Firewall of China

Tags:
tcp - ip

Overview The so-called "Great Firewall of China" operates, in part, by inspecting TCP packets for keywords that are to be blocked. If the keyword is present, TCP reset packets (viz: with the RST flag set) are sent to both endpoints of the connection, which then close. However, because the original packets are passed through the firewall unscathed, if the endpoints completely ignore the firewall's resets, then the connection will proceed unhindered. Once one connection has been blocked, the firewall makes further easy-to-evade attempts to block further connections from the same machine. This latter behaviour can be leveraged into a denial-of-service attack on third-party machines.

Further White Paper Details
Publisher	University of Cambridge	File Format	PDF
Date Published	January 2007	Downloads	1
Format	White Papers
Topics	TCP - IP, Firewalls, Network Security

Did you find this white paper useful? 4 out of 7 users found this white paper useful

Cash In Your PBX -- Upgrade with Cisco. Gain significant new savings now

PBX systems and old telephony applications were just not built for today's business needs. They don't scale easily, struggle to support mobility, and are increasingly expensive to maintain. Now you...

Publisher:
Cisco Systems

IOS Tips and Tricks

There are a number of things you can do with Cisco's IOS to make your life easier. This white paper presents some ways that IOS commands can help streamline your...

Publisher:
Global Knowledge

Tags:
tcp - ip

Dell-Customized Mobility Solutions

The marketplace is overflowing with a multitude of mobility options for businesses of all types and sizes. From notebooks, netbooks, and handheld computers to WiFi, smartphones, and mobile broadband, there...

Publisher:
Dell

Tags:
lan - wan standards

Interactive Guide: Enterprise Mobility

Getting Started With Enterprise Mobility: A Guide to Sybase's Enterprise Mobility Platform. With the broadest portfolio of industry-leading products, an innovative mobility platform that provides a foundation for future growth,...

Publisher:
Sybase

Tags:
wireless lan

Webcast & Video: Special Report on MEAP featuring research from Gartner

Complimentary Webcast: Taking a Strategic Approach to Enterprise Mobility. Whether you're just getting started with mobility or have already rolled out multiple applications, taking a strategic approach to mobility is...

Publisher:
Sybase

Tags:
wireless lan

Slammer time - SQL worm brings net to its knees over weekend

Anti-virus firm F-Secure said the effects were so marked because the worm generates massive amounts of network packets, overloading servers and routers and slowing down network traffic. SQL Slammer's code instructs the Microsoft SQL Server to go...

Channel:
Security Strategy

Gates shows off Service Pack 2 security

Like the pop-up blocker, the feature will allow the user to control whether the components are downloaded and displayed, blocked or require permission for each instance. The feature will allow users to block all pop-up ads, none or to ask...

Can I be your MSN Messenger buddy? And look at your hard drive too…

If anonymous callers are blocked, the attacker has to be identified on the victim's address list. If an attacker sent a particular sequence of packets to a server running Media Services 4.1, it could interrupt any video streams.

Channel:
Desktops

Government issues MySpool alert

The company said that aside from spreading across the internet, the worm also attempts to create a collective network which would allow remote hackers to launch a distributed denial-of-service attack from infected computers.

Channel:
Malware
Tags:
sans,
myspooler,
niscc

Analysis: What's the next malware threat?

Extortioners may also rent them to launch denial-of-service attacks on legitimate websites. He had planted Trojan software on the systems at the China Lake Naval Facility in California's Mojave Desert, enabling him to manipulate computers on the...

Cracked: The Great Firewall of China

Richard Clayton of the University of Cambridge computer laboratory explained: "The machines in China allow data packets in and out but send a burst of resets to shut connections if they spot particular keywords.

Featured White Papers

The Value of Location Intelligence in the Communications Industry

Public Services are under pressure, the challenge is to do more with less. How do you improve citizen satisfaction, increase cost efficiencies and improve service delivery? The power of location intelligence is helping many local authorities and government departments make more informed decisions and derive greater value from current location-based information and data. Read this whitepaper to see how you can take advantage of location intelligence.

Publisher:
Pitney Bowes

Best Practices for Translating Customer Satisfaction into Revenue

Today's support organisations are focused on two top-level metrics: financial results and customer satisfaction. For most, it's easy to track financial performance, but customer satisfaction is akin to speaking a foreign language. How do you quantify customer satisfaction? Download the Best Practices for Benchmarking Customer Satisfaction to get industry research the Association of Support Professionals (ASP) on how to measure and leverage customer satisfaction.

Publisher:
Citrix Online

HP print solutions and 3M

the objective for 3M was to optimize office printing infrastructure at 3Mlocations worldwide Reduce total cost and environmental footprint. Some of the business benefits acheived by switching to HP print soultions, More than $3 million in savings in first two years and Per page costs reduced by up to 90 percent.