[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] WAAS.....

2014-01-10 Thread J. L. Trantham
Robert, Thought as much but hadn't researched it. The next time it goes into annual, I'll see if I can get them to install the filter on the KY197. I haven't tried tuning the #2 Nav/Com, a KX165, to see if the same problem arises there as well. Perhaps the KX165 has a better behaved LO. As I

Re: [time-nuts] OT - Old Hatfield 2105 Step attenuator specs

2014-01-10 Thread Alberto di Bene
On 1/8/2014 11:13 PM, Alan Melia wrote: /Hi Alberto it is quite interesting to continue that test with no attenuator but the shells of the coax plugs connected together. I would guess with the gear you have the resultant would be at least 120dB downbut this is not the case for all

Re: [time-nuts] WAAS.....

2014-01-10 Thread Sanjeev Gupta
On Fri, Jan 10, 2014 at 3:32 AM, Joe Leikhim jleik...@leikhim.com wrote: Once at St John USVI, I spotted a huge luxury motor yacht anchored with 18 to 20 VHF or UHF fiberglass whip antennas attached top side. Never could figure why they needed so many. A Time-Nut's boat? -- Sanjeev Gupta

[time-nuts] Phase Noise at 5-10Mhz

2014-01-10 Thread Tom Knox
I was wondering what kind of Phase Noise performance benchmarks Time Nuts have achieved in their labs. I have been rebuilding my Time and Freq test system for the last few years and at times it has been humbling to say the least. I am finally seeing light at the end of the tunnel and seem to

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

Re: [time-nuts] Trimble Studio, what is it?

2014-01-10 Thread Paul Alfille
Trimble Studio works under wine (under linux). This is the newest version from the Trimble website v2.02.6 dated 10/25/2013 It's not prefect, some menu items will break it. But choosing your com port as a new Connection and GPS will show the Trimble Thunderbolt status. As far as I can tell,