seeing an awful lot of port 80 hitting port 21. (Why would port 80 ever be used as source?). Also saw a buncha cpanel "FAILED: FTP" alerts flickering on and off as the service throttled itself at a couple client sites I manage. I see 540 unique source IPs hitting 32 destinations on my network in just 1000 packets dumped on one router. All from multiple sequential registered /24s in whois, but all from one management company: 141.138.128.0/21 and 95.131.184.0/21 role: William Hill Network Services abuse-mailbox: networkservices@williamhill.co.uk address: Infrastructure Services 2 City Walk Sweet Street Leeds LS11 9AR AS49061 course, synfloods can be spoofed... perhaps they're hoping for a retaliation against WHNS. /kc On Tue, Nov 01, 2016 at 09:44:23PM +0300, Oleg A. Arkhangelsky said:
Hello,
A couple of cuts from tcpdump output:
21:31:54.995170 IP 141.138.131.115.80 > 109.72.248.114.21: Flags [S], seq 1376379765, win 8192, length 0 21:31:55.231925 IP 194.73.173.154.80 > 109.72.241.198.21: Flags [S], seq 2254756684, win 8192, length 0 21:27:50.413927 IP 95.131.188.179.80 > 109.72.248.114.21: Flags [S], seq 3619475318, win 8192, length 0 21:27:50.477014 IP 95.131.191.77.80 > 109.72.248.114.21: Flags [S], seq 2412690982, win 8192, length 0
Does anyone seeing this right now (18:31 UTC)? I see this traffic on at least two completely independent ISPs near Moscow. The rate is about a few dozen PPS hitting all BGP-announced networks.
--?? wbr, Oleg.
"Anarchy is about taking complete responsibility for yourself." ?? ?? ?? Alan Moore.
-- Ken Chase - math@sizone.org Guelph Canada