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There’s little doubt that passwords are an inconvenience. Unfortunately they remain the most practical way for most of us to keep our on-line identities to ourselves. Without them, or if you don’t keep them secret, it would be far easier for someone else to masquerade as you, to read and modify any of your information and to take any action in your name.

GD/NOTE/001 (01/01) This paper has been contributed by a Janet customer site, and records their experiences in investigating a denial-of-service attack committed using hosts at their site. We are very grateful to them for allowing us to publish this information and hope that it will be useful to others.

A1. CISCO IP-SLA Monitoring Probe Configuration Example Cisco® IP-SLA Probe Command Line Configuration used on JANET Monitoring probes at sites are configured with the Cisco® IOS command: ! tr responder ! This enables the IP-SLA process, allowing the router to receive, process, and return probes back to the CMP. For IOS version 12.4 this command became ‘ip sla monitor responder’ and the related commands changed also.

6.1 Operating System Support for Quality of Service When considering application support for QoS, a key underlying issue will be the level of QoS support in the operating system for packet marking. Earlier sections of this guide have stated that it is preferential to move the packet marking process as close to the source as possible. As such, the ability to do this within the host itself would be the ultimate outcome here. This section will present an overview of QoS support in the major end user operating systems including Microsoft Windows, Linux and UNIX based systems.