Forgotten war dialling risk leaves networks in peril

Wednesday, 1 October 2003, 3:07 PM EST

War Dialling, the scanning of telephone lines to find insecure modems that provide a back door route into corporate networks, is ignored as a risk by many organisations, security testing outfit NTA Monitor warns. The company is calling on organisations to revise their procedures to guard against the long established, but still serious, security risk.

A survey conducted by NTA Monitor between August and September to ascertain awareness among IT and security managers about War Dialling discovered 22 per cent of those questioned having no knowledge of the issue.

Almost a quarter (24 per cent) of respondents to the survey reported that there were unauthorised modems attached to systems at their sites. One respondent believed there might be as many as 20 modems over which he had no control running over a particular company's network.

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