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Network Firewall Policy Tries

whitepaper These critical devices filter traffic by comparing arriving packets to a list of rules, or security policy, in a sequential manner. Unfortunately packet filtering in this fashion can result in significant traffic delays, which is problematic for...

Tags: firewalls

[11 May 2008]

Trie-Based Policy Representations for Network Firewalls

whitepaper These critical devices filter traffic by comparing arriving packets to a list of rules, or security policy, in a sequential manner. Unfortunately packet filtering in this fashion can result in significant traffic delays, which is problematic for...

Tags: firewalls

[11 May 2008]

Firewall Design Principles

whitepaper Firewall technology can be used to filter this traffic. Whenever domains intersect, there is a potential need for security to control traffic allowed into the network. A network security domain is a contiguous region of a network that operates...

Tags: firewalls

[03 May 2008]

Simulating Strategic Firewall Placement

whitepaper If an overwhelming amount of traffic is coming into the ISP and being dropped, then only the ISP can effectively filter out the attack traffic. The ISP can then send all traffic straight to the firewall to filter based on the network administrator...

Tags: firewalls

[24 Apr 2008]

TechNet Webcast: Securing Your Messaging Traffic - Comprehensive Protection for Your Microsoft ISA Servers (Level 200)

whitepaper This webcast, presented by McAfee, explains the security issues that pose a threat to the messaging and Internet traffic, and the options available to filter the valuable information, help optimize resources, increase productivity and prevent...

Tags: application servers

[12 Apr 2008]

TechNet Webcast: Improving Desktop Security and Deployment (Part 5 of 7): Deploying IPSec With Windows Vista (Level 200)

whitepaper The presenter of this webcast looks at the new network stack in the Windows Vista operating system, and talks about how innovations in the stack can help secure the network by enabling new features to filter network traffic and prevent unwanted...

Tags: firewalls

[14 Jan 2008]

High-Speed Router Filter for Blocking TCP Flooding Under DDoS Attack

whitepaper In simulation study, the filter successfully blocked 99.9% of the attack traffic while legitimate traffic showed nearly identical performance as in the non-attacked condition. This paper presents a hardware solution that can reliably block most of...

Tags: tcp - ip

[14 Jan 2008]

Queue Delay Estimation and Its Application to TCP Vegas

whitepaper It also proposes an estimation algorithm for the marking queue delay in TCP data traffic by using the Kalman filter. This paper proposes a modified Vegas algorithm, which can be adjusted to take a fair share of the bandwidth compared to other TCP's.

Tags: tcp - ip

[14 Jan 2008]

Chili Company Improves Network With Security Server Upgrade

whitepaper SurfControl recommended Microsoft Internet Security and Acceleration (ISA) Server 2004 in conjunction with its SurfControl Web Filter for ISA Server as a firewall and Web cache solution. As a result, Skyline has a new security system that has...

Tags: application servers

[14 Jan 2008]

Round-Trip Time Estimation in Communication Networks Using Adaptive Kalman Filtering

whitepaper Based on a simple aggregated model of the network, an algorithm combining a Kalman filter and a change detection algorithm is proposed for RTT estimation. Heterogeneous communication networks with their variety of application demands, uncertain...

Tags: tcp - ip

[05 Dec 2007]

Estimation of RTT and Bandwidth for Congestion Control Applications in Communication Networks

whitepaper Based on a simple aggregated model of the network, an algorithm combining a Kalman filter and a change detection algorithm is proposed for RTT estimation. Heterogeneous communication networks with their variety of application demands, uncertain...

Tags: bandwidth issues

[05 Dec 2007]

Some Modeling and Estimation Issues in Control of Heterogeneous Networks

whitepaper Based on a simple aggregated model of the network, an algorithm combining a Kalman filter and a change detection algorithm is proposed for RTT estimation. Heterogeneous communication networks with their variety of application demands, uncertain...

Tags: tcp - ip

[05 Dec 2007]

SIFT: Snort Intrusion Filter for TCP

whitepaper In this paper, a Snort Intrusion Filter for TCP (SIFT) is presented that operates as a preprocessor to prevent benign traffic from being inspected by an intrusion monitor running Snort. High-level intrusion rules mapped directly into hardware...

Tags: tcp - ip, processing, traffic, intrusion

[30 Oct 2007]

Air Traffic Management Company Traps 98 Percent of Spam Using New Solution

whitepaper In 2003, the company deployed Microsoft Exchange Server 2003 with Service Pack 1 as its messaging system and used Microsoft Intelligent Message Filter (IMF) to manage spam. Switzerland-based Skyguide is the country's official provider of air...

Tags: spam - e-mail fraud - phishing, spam, exchange, pack

[30 Oct 2007]

Law Firm Cuts Costs, Saves Time With e-Mail - Filtering and Message-Archiving Service

whitepaper To solve these problems, Allen Matkins turned to Microsoft Exchange Hosted Services to deploy a hosted solution to filter spam, safeguard against viruses, and archive e-mail. As a result, the attorneys had stopped using the devices, and the...

Tags: application servers, clients, mail, spam

[28 Sep 2007]

An Inside Look at IPSec in Vista

whitepaper Any traffic that matches a specific filter is processed according to the filter action associated with it. An IPSec policy consists of a series of rules made up of filter lists and filter actions. When two machines communicate using IPSec, they...

Tags: windows vista, windows xp, filter, ipsec

[13 Sep 2007]

An Inside Look at IPSec in Vista

whitepaper Any traffic that matches a specific filter is processed according to the filter action associated with it. An IPSec policy consists of a series of rules made up of filter lists and filter actions. When two machines communicate using IPSec, they...

Tags: tcp - ip, windows xp, windows vista, filter

[13 Sep 2007]

Wireless Fusion Sensor Network (WFSN)

whitepaper In the fusion sensor domain, detecting and tracking of target objects are performed based on particle filter based position estimation, and the estimates from RFID/acoustic sensors (rasensors) are compensated by image generated by visual sensors...

Tags: monitoring systems, traffic, sensor, domain

[01 Aug 2007]

ISPs: 'Don't blame us for illegal activity'

News Last week a Belgian court ruled that the ISP Scarlet - formerly Tiscali - had the technology available to it to block or filter copyright-infringing material being sent over its network via peer-to-peer (P2P) traffic, and had six months to start...

Tags: ispa, file-sharing, isps

[12 Jul 2007]

Summary-Based Routing for Content-Based Event Distribution Networks

whitepaper The system uses similarity-based filter clustering to reduce overall event traffic and performs self-tuning summary precision selection to optimize throughput. This paper proposes a summary-based routing mechanism and introduces the notion of...

Tags: scalability, mechanism, routing, optimize

[24 May 2007]

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