Re: [time-nuts] NTP as vector for DDOS attacks?

2014-01-12 Thread Bob Camp
Hi There is indeed a list devoted to NTP and they have spent the last couple of months / years going over security issues in great detail. Bob On Jan 11, 2014, at 11:44 PM, Tapio Sokura tapio.sok...@iki.fi wrote: On 10.1.2014 23:10, Jim Lux wrote: but how long before someone thinks of

Re: [time-nuts] NTP as vector for DDOS attacks?

2014-01-11 Thread Tapio Sokura
On 10.1.2014 23:10, Jim Lux wrote: but how long before someone thinks of putting the amplifier after a botnet, rather than driving it directly. It has probably been done for a while already, like has been done before with protocols such as dns and chargen. I'm perpetually amazed how so many IP

[time-nuts] NTP as vector for DDOS attacks?

2014-01-10 Thread Jim Lux
http://arstechnica.com/security/2014/01/dos-attacks-that-took-down-big-game-sites-abused-webs-time-synch-protocol/ Interesting.. throw requests at an NTP server that look as if they come from the target, prompting large responses to the victim, presumably to overload it. The article talks

Re: [time-nuts] NTP as vector for DDOS attacks?

2014-01-10 Thread Chris Albertson
It's not a big deal. Even if one pool NTP server is down, there are literally hundreds others and most NTP users are configured to look at between three and five. Not only that if they POOL servers are randomly assigned so if one of your NTP servers is taken down, next time it is unlikely you'd

Re: [time-nuts] NTP as vector for DDOS attacks?

2014-01-10 Thread Paul
On Fri, Jan 10, 2014 at 2:52 PM, Chris Albertson albertson.ch...@gmail.comwrote: It's not a big deal. Even if one pool NTP server is down On Fri, Jan 10, 2014 at 4:32 AM, Jim Lux jim...@earthlink.net wrote: The article talks about how the victim site can easily filter out the messages

Re: [time-nuts] NTP as vector for DDOS attacks?

2014-01-10 Thread Jim Lux
On 1/10/14 1:06 PM, Paul wrote: On Fri, Jan 10, 2014 at 2:52 PM, Chris Albertson albertson.ch...@gmail.comwrote: It's not a big deal. Even if one pool NTP server is down On Fri, Jan 10, 2014 at 4:32 AM, Jim Lux jim...@earthlink.net wrote: The article talks about how the victim site can

Re: [time-nuts] NTP as vector for DDOS attacks?

2014-01-10 Thread Harlan Stenn
This amplification attack vector is really easy to stop. The procedure is documented in the CERT advisory, which was released with almost no forewarning to me or my team. While we knew about it and drafted the mitigation information and tweaked other portions of the announcement, we were