At 13:27 +1200 13/5/16, Juha Saarinen wrote: >Have some official comment from Telstra now: ><http://www.itnews.com.au/news/telstra-dns-outage-causes-customer-grief-419496>http://www.itnews.com.au/news/telstra-dns-outage-causes-customer-grief-419496
>Update A Telstra spokesman acknowledged last night's outage and attributed it >to a failure with a component that manages traffic to its two DNS servers. >"We can confirm there was an issue with one of our DNS servers which impacted >some of our corporate customers only. It was resolved in 90 minutes," the >spokesperson said. >"We isolated the component and traffic was directed to the servers." Thanks Juha! This suggests that the Telstra spokesman may have mis-read the DNS entries the same way I did (in order to conclude that there were "two [and only two] DNS servers"). And that the Telstra spokesman may have overlooked the use of Anycasting. Or, alternatively, the Telstra spokesman knows what he's talking about, and there's a single-point-of-failure for the entire Telstra service, viz. "a [single] component that manages traffic to its two DNS servers". That's consistent with 'a router' and hence with my initial presumption that the two DNS-servers are on the same sub-net. (But there are many other possibilities, so it certainly doesn't prove my presumption to be correct). I need to revise my critical comments to something like "it still seems like incompetence on the part of Telstra's technical staff and/or execs (e.g. if they ignored risk assessments and tech recommendations) and/or spokesman". I remain aghast, and I think Telstra customers should be as well. -- Roger Clarke http://www.rogerclarke.com/ Xamax Consultancy Pty Ltd 78 Sidaway St, Chapman ACT 2611 AUSTRALIA Tel: +61 2 6288 6916 http://about.me/roger.clarke mailto:[email protected] http://www.xamax.com.au/ Visiting Professor in the Faculty of Law University of N.S.W. Visiting Professor in Computer Science Australian National University _______________________________________________ Link mailing list [email protected] http://mailman.anu.edu.au/mailman/listinfo/link
