ocr: NETWORKS AREL BEING PROBED FROM ALL ACCESS POINTS 558 53.57 39.4%. 1927 57.55 intemal systeas Remote diario intemct Source Corotter. Sccuney asttute. Figure 1. In a survey of 428 corporations, gUVETTEDRET! agencies, and universities conducted by the Computer Security. nstitute (CSI, San Francisco) and the FBI, many respondents said their. sites had been attacked from ali sides.