nanog mailing list archives
Re: Fwd: port 123 reflection attacks
From: alvin nanog <nanogml () Mail DDoS-Mitigator net>
Date: Wed, 30 Dec 2015 02:11:39 -0800
hi ya colin On 12/30/15 at 09:04am, Colin Johnston wrote:
Where does it say we need to contact home cert instead on your website ?
because cncert () cert org cn asked ?
verification of what ?
i'd want to see if it's a simple port scan by a script kidddie vs a more serious upcoming DOS attack from attackers with a "evil purpose" they might just be poking around to find vulnerable ntpd servers ? since there's been no satisfactory answer in 5 days, in the meantime, i'd suggest: - be sure ntpd is properly configured - be sure to be running the latest ( no known exploits ) ntpd server - ntpd servers should only be necessary for your servers ... and incoming connections from outside should never reach your ntpd - use an alternative ntpd server/source on a different wire
HSOFT ranges have been compromised by NTP reflection attacks
there's a difference between compromized vs port scanning ( probes ) - compromized... hsoft need to fix it ( upgrade and reconfigure ntpd ) - probes/scanners ... nothing much you can do other than limit your outgoing ( 123/udp) replies - there's thousands of probes occuring constantly on various ports ...
and the NTP servers hosted by HSOFT need to have a NTP update.
they better get going to update their ntpd and configs ... i'd rattle hsoft's cage harder ... :-)
This has been discussed on NANOG and I also sent information in Chinese to aid debug as well. Have had no response from HSOFT…
:-) i wonder what else is occupying their time magic pixie dust alvin # DDoS-Simulator.net
From: "cncertcc" <cncert () cert org cn> Subject: Re:Fwd: port 123 reflection attacks Date: 30 December 2015 at 08:15:28 GMT To: "Colin Johnston" <colinj () gt86car org uk> Greetings, Please forward the case to the corresponding CERT you are located in first to have it transferred to CNCERT after verification. Thanks for your understanding.
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From: Colin Johnston <colinj () gt86car org uk <mailto:colinj () gt86car org uk>> Subject: port 123 reflection attacks Date: 25 December 2015 at 11:19:26 GMT To: 16036260 () qq com <mailto:16036260 () qq com>, ipas () cnnic cn <mailto:ipas () cnnic cn> Cc: Colin Johnston <colinj () gt86car org uk <mailto:colinj () gt86car org uk>> please stop the port 123 reflection attacks from 115.47.24.220
Current thread:
- Fwd: port 123 reflection attacks Colin Johnston (Dec 30)
- Re: Fwd: port 123 reflection attacks alvin nanog (Dec 30)
- Re: Fwd: port 123 reflection attacks Randy Bush (Dec 30)
- Re: Fwd: port 123 reflection attacks alvin nanog (Dec 30)