New device looks to stop DoS attacks at the source

Looking to move the fight against Denial of Service attacks away from attack targets and back to their source, Cs3 Inc. Wednesday announced the release of its Reverse Firewall network device.

The Reverse Firewall sits between the Internet and the network it's protecting and limits the flow of outbound information from the network in order to prevent systems from being used for Denial of Service (DoS) attacks, said Krishnamurthy Narayanaswamy, Cs3 co-founder and chief technical officer.

The device is able to do this by using Cs3's "fair service scheduling" technology which distributes available bandwidth equally across all outbound connections, rather than allowing just one connection to hog it all as an attack traffic would, he said. Fair service scheduling also puts a priority on two-way connections, that is, connections in which two computers are participating, rather than the one-way data flows which would characterize attack traffic, he said. The device can also help administrators identify both attacks and machines that may have been taken over for use in attacks, by notifying administrators when large amounts of suspicious outbound traffic are being sent, he said.

Denial of Service attacks are those in which a target system is flooded with false requests for information with such volume that it is unable to answer legitimate requests. The more intense version of the attack, the Distributed Denial of Service (DDoS) attack uses multiple computers worldwide to attack a single target. DDoS attacks knocked offline such major Web sites as Amazon.com, Yahoo.com and EBay.com in Feb. 2000.

Cs3 took the approach of limiting outgoing traffic, rather than trying to protect individual sites or networks with anti-DoS devices because it sees DoS attacks as infrastructure, rather than site problems, Narayanaswamy said.

By targeting sites with large numbers of installed computers, such as ISPs (Internet Service Providers), enterprises and universities, Cs3 hopes to help safeguard not only machines that might be attacked using these networks, but also to protect the machines on these networks whose bandwidth would likely be eaten up by an attack, he said.

The Reverse Firewall is available immediately worldwide and costs US$4,000. Larger networks might need more than one device, Narayanaswamy said.

Join the newsletter!

Error: Please check your email address.
Rocket to Success - Your 10 Tips for Smarter ERP System Selection
Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Sam Costello

PC World
Show Comments

Cool Tech

SanDisk MicroSDXC™ for Nintendo® Switch™

Learn more >

Breitling Superocean Heritage Chronographe 44

Learn more >

Toys for Boys

Family Friendly

Panasonic 4K UHD Blu-Ray Player and Full HD Recorder with Netflix - UBT1GL-K

Learn more >

Stocking Stuffer

Razer DeathAdder Expert Ergonomic Gaming Mouse

Learn more >

Christmas Gift Guide

Click for more ›

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Edwina Hargreaves

WD My Cloud Home

I would recommend this device for families and small businesses who want one safe place to store all their important digital content and a way to easily share it with friends, family, business partners, or customers.

Walid Mikhael

Brother QL-820NWB Professional Label Printer

It’s easy to set up, it’s compact and quiet when printing and to top if off, the print quality is excellent. This is hands down the best printer I’ve used for printing labels.

Ben Ramsden

Sharp PN-40TC1 Huddle Board

Brainstorming, innovation, problem solving, and negotiation have all become much more productive and valuable if people can easily collaborate in real time with minimal friction.

Sarah Ieroianni

Brother QL-820NWB Professional Label Printer

The print quality also does not disappoint, it’s clear, bold, doesn’t smudge and the text is perfectly sized.

Ratchada Dunn

Sharp PN-40TC1 Huddle Board

The Huddle Board’s built in program; Sharp Touch Viewing software allows us to easily manipulate and edit our documents (jpegs and PDFs) all at the same time on the dashboard.

George Khoury

Sharp PN-40TC1 Huddle Board

The biggest perks for me would be that it comes with easy to use and comprehensive programs that make the collaboration process a whole lot more intuitive and organic

Featured Content

Product Launch Showcase

Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?