Library items tagged: advisory

Anonymous
The use of VPN technologies within the Janet community has been considered and the requirements for centralised provider-provisioned VPN services have been assessed. The assessment was carried out in March-April 2006, when the VPN survey was conducted. 121 of the responses received showed strong interest in VPN services within the Janet community: over 80% of respondents indicated that they use some form of VPN service; about 55% of the rest plan to use VPN in the near future.
Anonymous
Generally, VPN is only worth consideration when collaboration between sites or remote users and sites is long-term relative to the time needed to provision the service. If VPN use is short-term then the overheads associated with service provisioning may not be justified. For example, if the provisioning of a VPN service takes, say, two days, it is not worth using such a service for a 10 minute VoIP phone connection. However, it might be effective to connect several sites for a research trial lasting some six months.
Anonymous
General Definition Material in this section is based on material from Computer Networks: Principles, Technologies and Protocols for Network Design by Natalia Olifer and Victor Olifer (pub. John Wiley & Sons 2005). The term ‘VPN’ has no standard interpretation. Different networking specialists and different organisations may understand it in different ways.
Anonymous
Janet provides its users with a basic transmission service, which is a regular IP best-effort service. Every packet is treated alike, with the same chance of being delayed or dropped if network congestion occurs. However, network applications available to Janet users may benefit from enhanced transport services. For example, multimedia applications like IP videoconferencing and VoIP may benefit from enhanced network performance (for example lower latency and delay variation parameters than are available from IP best-effort) that IP QoS could provide.
Anonymous
Victor Olifer With contributions from Duncan Rogerson, Steve Williams, Rina Samani, David Salmon, Chris Cooper, Andrew Cormack
Anonymous
Matthew Cook, Loughborough University Authors and Contributors This document was put together by Loughborough University to share knowledge, experience and current trends surrounding firewall implementation with the JANET community. This Technical Guide is complemented by the JANET Training programme which provides courses covering multiple facets of firewall implementation as part of their extensive portfolio.
Anonymous
Universities or colleges consisting of multiple campuses, each with a LAN, traditionally connect geographically diverse ‘islands’ by means of private leased lines. If the connected site is small and consumes little bandwidth, the costs of such WAN links do not necessarily represent value for money. Many organisations also wish to offer their staff the facility to connect to their central network remotely, either from their houses or when travelling on business.
Anonymous
Papers Foxes Academy Multi-site WAN based on EPS9, SHDSL and IP DSLAM
Anonymous
Secure Virtual Private Networks - Dr John Graham's guide has now been updated in collaboration with Matthew Cook and is recommended as essential reading for anyone contemplating setting up VPN inter-site or remote access systems.
Anonymous
The multi-site connectivity advisory service has now closed.  Archived versions of the service's content can be found here: Case studies Technical guides Technology