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Designing a Hardware-Accelerated Firewall With Two 10 Gbps Ports

High-speed packet filtering should be one of the first steps in securing any modern computer network. However, solutions over 1 Gbps are practically impossible to implement in software, and must be implemented with the use of specialized hardware. This paper describes the design of a two-port firewall for 10 Gbps...

Tags: Gbps, Hardware, CESNET, Target Platform, Firewalls, Network Security, Networking

White papers 2008-12-19

Flow Based Network Intrusion Detection System Using Hardware-Accelerated NetFlow Probes

Current network intrusion detection methods based on anomaly detection approaches suffer from comparatively higher error rate and low performance. Proposed flow based network intrusion detection system addresses these issues by using hardware-accelerated probes to collect unsampled NetFlow data from gigabit-speed network links and combining several anomaly detection algorithms by means...

Tags: Network Intrusion Detection System, Network, Intrusion Detection System, Network Intrusion Detection, CESNET, Anomaly Data, Intrusion Detection, Networking, Security

White papers 2008-09-30

Impact of Network Security on Speech Quality

This technical paper deals with impact of secured network environment on speech quality. There are presented the results of the analyzing of voice over secure communication links based on TLS, specially in OpenVPN solution. The using of secure network environments can affect a speech quality. Here is the performance comparision...

Tags: Network, Network Security, CESNET, Speech Quality, Networking, Security

White papers 2008-03-12

Real-Time Anonymization in Passive Network Monitoring

Passive network monitoring that observes user traffic has many advantages over active monitoring that uses test packets. It can provide characteristics of real user traffic, that cannot be detected actively. However, when processing user traffic, one must guarantee user privacy. This is a task of packet header anonymization that removes...

Tags: Sensitive Information, Network, Network Monitoring, CESNET, User Traffic, Network Administration, Networking

White papers 2007-04-05

ABW - Short-Timescale Passive Bandwidth Monitoring

Bandwidth usage monitoring is important for network troubleshooting and planning. Traditionally, used bandwidth is computed from router interface byte counters read by SNMP. This method only allows to check long-term averages of the total used bandwidth without information about short-term dynamics and without knowledge of what applications are consuming most...

Tags: Bandwidth, Monitoring, Bandwidth Usage, CESNET, Bandwidth Usage Monitoring

White papers 2006-11-18