PBL Update and Comparisons - April 2009
ID: 96cb58fe-2dbc-5f94-b53d-23501aa6b6b6
STIX ID: report--96cb58fe-2dbc-5f94-b53d-23501aa6b6b6
Feed Name: The Spamhaus Project
Threat Score
A 2009-era analysis of Spamhaus PBL and CBL data showing botnet/spam densities across IPv4 ranges for multiple ISPs. The report presents counts of PBL-listed addresses, visual density maps of bot detections per /24, and discusses differences in ISP practices (rDNS naming, dynamic vs static address handling, outbound mail policies) that correlate with high or low spam/bot infection rates, with concrete examples from Vodacom, Turk Telecom, LACNIC ranges, France Telecom, and Comcast.
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