advisory

Possible areas of VPN use within the Janet community

Anonymous
Friday, February 3, 2012 - 10:35
advisory
multi-site connectivity
VPN
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.
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VPN definitions and understandings

Anonymous
Friday, February 3, 2012 - 10:33
advisory
multi-site connectivity
VPN
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.
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VPN on Janet

Anonymous
Friday, February 3, 2012 - 10:30
advisory
multi-site connectivity
VPN
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.
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Different flavours of VPN: technology and applications

Anonymous
Friday, February 3, 2012 - 09:50
advisory
multi-site connectivity
VPN
Victor Olifer With contributions from Duncan Rogerson, Steve Williams, Rina Samani, David Salmon, Chris Cooper, Andrew Cormack
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Firewall implementation at Janet-connected organisations

Anonymous
Friday, February 3, 2012 - 09:49
advisory
multi-site connectivity
firewalls
security
technical guide
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.
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Secure Virtual Private Networks

Anonymous
Friday, February 3, 2012 - 09:48
advisory
mutli-site connectivity
VPN
security
technical guide
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.
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Case studies

Anonymous
Friday, February 3, 2012 - 09:44
advisory
multi-site connectivity
case studies
Papers Foxes Academy Multi-site WAN based on EPS9, SHDSL and IP DSLAM
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Technical guides

Anonymous
Friday, February 3, 2012 - 09:43
VPN
advisory
multi site connectivity
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.
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Multi-site Connectivity Advisory Service

Anonymous
Friday, February 3, 2012 - 09:42
advisory
multi-site connectivity
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 
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Disabling 802.11b

Anonymous
Thursday, February 2, 2012 - 14:03
wireless
advisory
standards
802.11x
802.11b
disabling
IEEE 802.11b is one of the oldest WiFi standards still in use and is beginning to show its age. IEEE 802.11b products first started to appear in 1999. Now, more than a decade since its first appearance, the time is approaching for IEEE 801.11b to be turned off, for the reasons detailed below. As this may not be immediately possible for some sites, possible transition and migration strategies are also described below.
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