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Alternatively, please call +44 (0)8000 470 481

Businesses are moving ever more services to the Data Centre, or Cloud platforms located therein, making them highly dependent on network availability. The potential impact of any outage has increased correspondingly, the inability to connect to the Internet results in immediate revenue and reputation impact.

Thus, a key consideration for all clients within the Data Centre environment is network security, both physical security and also against one of the greatest threats to service uptime, Distributed Denial of Service (DDoS) attacks.

Industry professionals and business analysts report that DDoS attacks are occurring more frequently, with greater volumes and increased sophistication. Recognising this issue, C4L has ensured that the coreTX network offers the very best protection from DDoS, by deploying the A10 Networks Thunder TPS, into the fabric of our coreTX network. A10 TPS provides high-performance, network-wide protection from DDoS attacks, maintaining service availability against a variety of volumetric, protocol, resource, and other sophisticated application attacks.


A Denial-of-Service attack is an attempt to make a machine or network resource unavailable to its intended users. Distributed DoS attacks occur where a large number of compromised PC's flood the bandwidth or resources of a target system, denying service to legitimate traffic.

DDoS attacks are constantly increasing in size, complexity and frequency, as a consequence the most effective approach to DDoS monitoring and mitigation is to address it at a network level. C4L constantly monitors all Internet facing connections into our network to identify and redirect DDoS traffic, this allows us to maintain normal service for our customers even whilst attacks occur.

DDoS Protection

C4L has deployed the A10 TPS solution to mitigate the effects of DDoS across our entire network, working in conjunction with our high-speed detection and forensic analysis software to analyse all coreTX network traffic. This allows C4L engineers to monitor in real-time and scale in parallel with our traffic growth, our solution is specifically designed to detect and alert suspicious activity in carrier grade networks. The combination of the coreTX network and A10 TPS delivers a total solution both in terms of performance and security.

C4L constantly learns and understands the patterns of behaviour in the coreTX network, when any system starts behaving unusually, both the C4L Network Operations Centre (NOC) and the A10 TPS platform are alerted and the infected traffic is redirected. This protects the coreTX network as a whole, however, the software is granular enough to allow specific analysis rules and traffic scrubbing services to be delivered at a per customer IP level as a premium service to 'scrub' the traffic clean, so your services can continue to operate normally, even whilst under attack.

Multi-vector Application & Network Protection

  • Detect and mitigate application and network attacks
  • Flexible scripting and deep packet inspection (DPI) for rapid response


High Performance Mitigation

  • Mitigate high volume attacks in excess of 100Gbps
  • Processing millions of packets per second


Modular Scalability

  • Multi-site deployment for resilience
  • Capacity to cluster additional nodes as traffic rates increase


Rapid Traffic Analysis & Threat Identification

  • Entire coreTX network monitored for instant protection
  • Upgrade to enhanced traffic 'scrubbing' per client, service or IP

DDoS attacks can lead to:

  • Lost revenue: Slow web pages and down-time will lead to lost sales
  • Brand damage: Negative consequences are immediate and long lasting
  • Competition: Unavailable websites drive customers to the competition
  • Customer loyalty: Miss out on potential repeat customers
  • Adverse publicity: Social networking means bad news travels fast
  • Financial Costs: Overage charges, emergency fees, new HW, staff overtime etc
  • Repeat attacks: Much more likely, usually very soon!

C4L DDoS Mitigation Service Definition

C4L DDoS mitigation provides a host of features to detect and mitigate multi-vector DDoS attacks with unprecedented performance scalability and deployment flexibility. We support a vast set of features to validate, block or rate-limit the traffic entering our network, service availability is maintained whatever attack types is employed, volumetric, protocol, resource or even application-level attacks.

All C4L customers with equipment and services deployed 'On-net' automatically benefit from 24x7x365 DDoS monitoring and analysis. In the event that an attack is identified, traffic will be routed away from the core network, ensuring that there is no loss or degradation of service as a result of an attack on a 'neighbour'. This is a standard benefit for all On Net customers, however, in the event that it is your specific server which comes under attack, then this will result in your traffic being dropped in order to protect the network.

The premium DDoS mitigation solution ensures that your legitimate traffic will always be delivered to your platform even whilst under DDoS attack. In this solution, the DDoS traffic is routed through the A10 TPS platform and is 'scrubbed', to remove the DDoS traffic from the good traffic. The resultant clean traffic is delivered to your service at all times, ensuring that your solution is not impacted in any way. On Net customers can select standard IP transit, or DDoS mitigated IP transit at any time in order to take the benefit of this service.

Recommendations and Considerations for Companies Transitioning to the Cloud

This paper highlights key considerations for companies who are looking to take a step into the virtualised world, and goes on to provide recommendations for those considering cloud computing as a means of operating their IT infrastructure.



Connect with one of our infrastructure advisors today to find out how our services can help.


Alternatively, please call +44 (0)8000 470 481

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