Hi,
Below please find some statistic of per AS open relays numbers based on njabl.org data (njabl.org retests open relays after 90 days) and riswhois.ripe.net queries. It shows that 25% of open relays detected by njabl.org is hosted by 16 ASes. [ 10%->3; 20%->10; 30%->25; 40%->48; 50%->89; 60%->168]
No ORs %ORs TOTAL AS 1 886 5.33% 5.33% AS4134 CHINANET-BACKBONE (CN) 2 403 2.43% 7.76% AS7132 CHINANET-BACKBONE (CN) 3 396 2.38% 10.14% AS7491 Pacific Internet Philippines ASN (PH) 4 344 2.07% 12.21% AS3462 HiNet (TW) 5 314 1.89% 14.10% AS4766 KT-NET (KR) 6 296 1.78% 15.88% AS4713 7 268 1.61% 17.49% AS4837 8 174 1.05% 18.54% AS4812 9 159 0.96% 19.50% AS3352 10 147 0.88% 20.38% AS7678 11 144 0.87% 21.25% AS209 12 143 0.86% 22.11% AS4732 13 141 0.85% 22.96% AS701 14 136 0.82% 23.78% AS6503 15 128 0.77% 24.55% AS2828 16 119 0.72% 25.26% AS3215 17 114 0.69% 25.95% AS3269 18 114 0.69% 26.64% AS3786 19 113 0.68% 27.32% AS2856 20 108 0.65% 27.97% AS8151
IMHO it shows that AS based policies have a chance to deliver useful results.
Yup, it probably does. But please take this to the anti-spam-wg, where it belongs. Henk ------------------------------------------------------------------------------ Henk Uijterwaal Email: henk.uijterwaal(at)ripe.net RIPE Network Coordination Centre http://www.amsterdamned.org/~henk P.O.Box 10096 Singel 258 Phone: +31.20.5354414 1001 EB Amsterdam 1016 AB Amsterdam Fax: +31.20.5354445 The Netherlands The Netherlands Mobile: +31.6.55861746 ------------------------------------------------------------------------------ In a room with a window in the corner, I found truth. (Ian Curtis)