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Closed User Group

Connect to two or more sites, suppliers, partners or customers at the same time – all on private connections that put you in control. Ideal for creating a common environment for your suppliers and partners.

A Closed User Group (CUG) is a method of allowing members to pass traffic between themselves for a specific purpose.
The LINX CUG service is available at LINX in London, LON1 and LON2 and also at LINX Manchester and LINX NoVA.

LINX Closed User Groups

It is available for directly connected LINX members to utilise as well as members connected via a ConneXions Reseller Partner or LINX IXP Partner.

A member may set up or join a closed user group from his peering port, or he may choose to have a separate port for this purpose.

It is a requirement of the service that the member port is configured to support pVLAN services. If the member wishes to access the service from a port that does not currently support pVLAN (Dot1q tagged) services, then the LINX NOC will work with the member to change the configuration of the port accordingly as part of the process.

If members are using a peering port, for the service then the closed user group service will be configured to the specified bandwidth, and the remainder of the bandwidth is available for peering. (For instance, a 10GE port configured with a closed user group service for 1GE will have 9GE available for peering).

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Use Case

NaWas Launches First LINX Closed User Group


Frank Dupker European Network Manager for NaWas says it was a simple decision to connect to LINX in London and are pleased to be the first member to create a Closed User Group on the LINX network to deliver their DDoS services.

“We have customers in the UK, so joining LINX was a great solution to get closer to our members. We are able to manage our bandwidth and general network management so much better.”


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NaWas are already serving DDoS protection for a growing number of LINX members via their Closed User Group and are anticipating this number growing quite rapidly, as the issue of DDoS attacks continues to rise.

“The mix of increased usage and reliance on the Internet and remote working has meant hackers have got wiser and have far more opportunities to attack. We are really pleased to be using the LINX Closed User Group service to now deliver our DDoS protection service, we can deliver a faster and improved service to our UK members.”

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