Xtra cache boxes wrongly fingered in DDOS probe

Xtra customers had problems reaching some major US sites last week because its cacheing appliances were mistakenly identified as part of a denial of service attack and blocked from the US.

Xtra customers had problems reaching some major US sites last week because its cacheing appliances were mistakenly identified as part of a denial of service attack and blocked from the US.

Many Xtra customers were unable to reach sites such as register.com and infoseek.com because AboveNet, the upstream provider used by Telecom's Global Gateway service, identified traffic in a distributed denial of service attack as coming from part of Xtra's network.

Xtra spokesperson Mary Parker says the ISP's CacheFlow cacheing appliances are on the network identified by AboveNet and appear to have been the source of the problem.

"Unfortunately multiple connections from our CacheFlows were interpreted as part of the attack. After we talked to [AboveNet] they took those blocks of. It took us a bit of working out, which is why the problem went on for a little while."

A separate issue related to routing problems between AboveNet and Cnet.com and its affiliates, such as download.com, which affected all Global Gateway customers on Friday, has also been fixed.

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