Sally's SCADA system Sally remotely operates equipment as part of a national infrastructure project. Her network is isolated from the internet. It uses dedicated fibre cores where possible with VPN where fibre is not available. The VPN links pass through national carriers in remote locations and have high and variable latency and relatively low bandwidth. Sally deploys caching proxies at the ends of VPN links to avoid duplicate data transfer and improve system availability and responsiveness when these links are playing up. The system is expected to work for 15 to 20 years and will be maintained by different organisations over this period. Long term interoperability concerns dominate engineering decision making processes. Sally doesn't want to add a failure mode to the system where certificates expire and bring down the system.Received on Monday, 9 December 2013 07:53:27 UTC
This archive was generated by hypermail 2.4.0 : Thursday, 2 February 2023 18:43:39 UTC