Oggi erano e sono tuttora in corso attacchi dDoS verso l’instrastruttura nameserver di Dyn e questo ha causato downtime e problemi di raggiungibilità anche per siti popolari come Twitter e Soundcloud.
Sembra proprio essere un periodo di attacchi dDoS sempre più forti e feroci, come dimostra tra l’altro anche il recente attacco verso il sito di Bryan Krebs.
http://time.com/4540265/internet-outages-ddos-dns/
dig twitter.com +trace
; <<>> DiG 9.9.4-RedHat-9.9.4-29.el7_2.4 <<>> twitter.com +trace
;; global options: +cmd
. 364697 IN NS h.root-servers.net.
. 364697 IN NS k.root-servers.net.
. 364697 IN NS m.root-servers.net.
. 364697 IN NS i.root-servers.net.
. 364697 IN NS b.root-servers.net.
. 364697 IN NS j.root-servers.net.
. 364697 IN NS d.root-servers.net.
. 364697 IN NS a.root-servers.net.
. 364697 IN NS g.root-servers.net.
. 364697 IN NS l.root-servers.net.
. 364697 IN NS e.root-servers.net.
. 364697 IN NS f.root-servers.net.
. 364697 IN NS c.root-servers.net.
. 451996 IN RRSIG NS 8 0 518400 20161102190000 20161020180000 39291 . gbqVlNEfCKFZtU7XwE+xWwSofxsrpYlJiIPTgkyVrBODSekDclBwA7QH aI6zaam3OWv2IktFa6m3EgtHN9J8HMHqYKmUdyejfz2+a6wzPitTGNcW lFOVRN1f1OJr48OtuL4+GI+pwtvA/9GCaafCHu7YyByffs3s7MSDnW36 826Kbtx39QTfT/PSo3t9/D5/UIHDxhEj8BV69jIqkgvmG9c80MtOdoV8 F5Iy7vWbItwCJbt8gEVLHu2+MfVm6umGdy9SEVlXcGyMG8IHfXCDaNcK Tv3FoOSrriDGbvix9jPI4iohdWA6yEx6Ty47NCNjJK8W1rmTrRBUJkMj 8qY0bw==
;; Received 1097 bytes from 84.33.37.103#53(84.33.37.103) in 3 ms
com. 172800 IN NS a.gtld-servers.net.
com. 172800 IN NS b.gtld-servers.net.
com. 172800 IN NS c.gtld-servers.net.
com. 172800 IN NS d.gtld-servers.net.
com. 172800 IN NS e.gtld-servers.net.
com. 172800 IN NS f.gtld-servers.net.
com. 172800 IN NS g.gtld-servers.net.
com. 172800 IN NS h.gtld-servers.net.
com. 172800 IN NS i.gtld-servers.net.
com. 172800 IN NS j.gtld-servers.net.
com. 172800 IN NS k.gtld-servers.net.
com. 172800 IN NS l.gtld-servers.net.
com. 172800 IN NS m.gtld-servers.net.
com. 86400 IN DS 30909 8 2 E2D3C916F6DEEAC73294E8268FB5885044A833FC5459588F4A9184CF C41A5766
com. 86400 IN RRSIG DS 8 1 86400 20161103050000 20161021040000 39291 . XKOTc+ANvbFctHL1ivfhJZboerdpit2heZ9QzNXr65etLNXVdXW/6G8I hYj38t9WitgvZGMdSDeBqZ17gHRvywFtWiYQerHwTZJrgAOJ4pAzdtlh Z97b/9ymVlO67uV8kY5ckhT8pCe60hTcGzas2FvgX9Flq6M/+8jxFwt+ luTx64N1QBc8vxZgfHiYs68a6uKvpE+2AWteXc++cUMAszIyine0V/vw HiLUn4iDRo9UWria5MNNjp8yv6mdyaGbSAeHEaHCEuxTeRRHD1w9/qu1 dWq9AgIFDWo8jfHe2V/BWqRV2lFZYI73VCsb9u8OZxTxEJMIzsxgsvmm GBWP8A==
;; Received 863 bytes from 192.203.230.10#53(e.root-servers.net) in 93 ms
twitter.com. 172800 IN NS ns1.p34.dynect.net.
twitter.com. 172800 IN NS ns2.p34.dynect.net.
twitter.com. 172800 IN NS ns3.p34.dynect.net.
twitter.com. 172800 IN NS ns4.p34.dynect.net.
CK0POJMG874LJREF7EFN8430QVIT8BSM.com. 86400 IN NSEC3 1 1 0 - CK0Q1GIN43N1ARRC9OSM6QPQR81H5M9A NS SOA RRSIG DNSKEY NSEC3PARAM
CK0POJMG874LJREF7EFN8430QVIT8BSM.com. 86400 IN RRSIG NSEC3 8 2 86400 20161025044429 20161018033429 6404 com. AH9irkzaB4cAY3eWsoMK1EIRWM9BQnOHCWiZXIeS2XLjnqeV4utkWlLR 4OAWffKjOwk4w/EHjpzyh0Ow3W0AJ+DSUcqTlyw9q8PlCh52dunQp75u HwaidnXXIAWFGQLIqPeD2/GNw7d159vzEgS7kp3VosK+2icfw3hbZ39B Us0=
7T793LI65L1MT71L2QPHR2CVKM2LT4GA.com. 86400 IN NSEC3 1 1 0 - 7T7E5BSTLT1NI9CQJC7D63EPG16SK6LG NS DS RRSIG
7T793LI65L1MT71L2QPHR2CVKM2LT4GA.com. 86400 IN RRSIG NSEC3 8 2 86400 20161028042656 20161021031656 6404 com. Faq4NIRjr3FeyCJyPdSm/1L3EDI6l7Exq076GG1/k+wtiqjTGE8zCV6F AQCGpzdSfFu4CdjYuWcpvTz6xN9j/KELl6Iw1KeDi6B8PdCn8xKhpPwJ boMhfPfibkm0kGhThDw7e62FDKQke6AxRE0LbLFqLT38sbnTgTO65VOv UF4=
;; Received 675 bytes from 192.12.94.30#53(e.gtld-servers.net) in 6 ms
;; Received 29 bytes from 2001:500:90:1::34#53(ns1.p34.dynect.net) in 776 ms
