Hi All, One of the sessions this morning was from Geoff Huston on the recent NTP server DDoS attacks. The presentation is here https://conference.apnic.net/data/37/2014-02-25-ntpddos_1392941955.pdf In short if you appear on the http://openntpproject.org/ list then you should be looking to clean this up before you contribute to global DDoS attacks the size of which we have not seen in the past. I've run the WIX and APE peering ASNs against the page and here are the number of open NTP servers. You can do this yourself by substituting your AS (instead of 9483) into the following URL http://openntpproject.org/searchby-asn.cgi?search_asn=9483 If you want it as a csv then use http://openntpproject.org/searchby-asn.cgi?search_asn=9483&csv=1 Here is the WIX & APE list. Bear in mind that this only covers the NTP servers which are in the AS that peers on the exchange. Not the customers of that AS. You should use the page above to check all your customer ASNs as well and work with them to patch any servers. WIX Open NTP servers 4823 total 709 AS4770 618 AS2687 603 AS9503 368 AS23838 304 AS23655 272 AS17746 256 AS18119 205 AS24183 187 AS45280 187 AS24466 158 AS18400 122 AS10022 118 AS18015 117 AS55454 91 AS9872 73 AS132040 63 AS24324 58 AS38477 53 AS18353 51 AS45177 39 AS17412 27 AS17435 25 AS42 23 AS9433 19 AS17705 17 AS24347 12 AS23905 10 AS8674 8 AS9834 4 AS24074 4 AS24005 4 AS17649 4 AS17484 3 AS38329 3 AS132003 3 AS12076 2 AS24006 1 AS7696 1 AS18021 1 AS17792 APE Open NTP servers 11877 total 2472 AS4739 1773 AS9889 1236 AS9738 709 AS4770 618 AS2687 603 AS9503 460 AS4826 368 AS23838 304 AS23655 285 AS45459 272 AS17746 256 AS18119 229 AS38333 205 AS24183 187 AS45280 187 AS24466 185 AS24130 158 AS18400 125 AS9790 125 AS9245 122 AS10022 118 AS18015 97 AS56030 91 AS9872 73 AS132040 63 AS24324 58 AS38477 53 AS18353 51 AS45177 44 AS58666 39 AS17412 37 AS55561 27 AS17435 26 AS9303 25 AS42 23 AS9898 23 AS9433 19 AS55752 19 AS17705 17 AS9431 16 AS18199 10 AS24398 10 AS23710 8 AS9834 7 AS17492 6 AS55785 5 AS9559 5 AS55872 4 AS24074 4 AS24005 4 AS17649 3 AS45946 3 AS12076 2 AS9897 2 AS9896 2 AS37974 1 AS38451 1 AS132347 1 AS132304 1 AS10200