Some analysis of Apews data

This has taken a while since there is a lot of it! By comparing our own records with listings that exist in the Apews dataset we have been able to conclude the following;

Single IP addresses that have made a direct connection to our servers in order to send spam email have also been found in C-1, C-2, C-12, C-35C-52, C-53, C-66, C-67, C-73 and C-630.

Mostly /24 listings can mostly be found in C-3, C-11, C-13, C-21, C-36, C-41, C-130, C-1375 and C-1402. These /24 generally include the above single IP addresses suggesting that they are maybe escalations.

Single IP addresses that have done port scanning, SSH probes, attempted PHP or SQL injection, password guessing, hosting landing pages that contain virus, trojan etc have only been found in C-16 and C-86.

CIDR that contain residential customers, typically have no reverse DNS and generic host names (as noted in some records by Apews) have been found in C-22, C-1010 and C-1403. These are often referred to as dynamic since they can be large DHCP pools too. These CIDR would not be RFC compliant for the sending of emails.

Other CIDR, usually larger than /24, can be found in C-14, C-15, C-17, C-18, C-20, C-79, C-258 and C-813.