nanog mailing list archives
Re: Open Letter to D-Link about their NTP vandalism
From: "Brian Dickson" <briand () chateau-briand net>
Date: Tue, 11 Apr 2006 23:47:11 -0400
Two concrete technical suggestions to mitigate the volunteered NTP server's usage issues at the DIX: (1) Have someone else anycast the DIX block, and NAT the incoming NTP requests to another NTP stratum-1 server (eg pool address(es)). Or a much better idea: (2) Renumber into a new /24, which is announced only at the DIX with no-export, so that only DIX members are able to reach the server - as was the intended usage of this NTP server in the first place. (The announcment can be made by anyone at the DIX, it is not strictly necessary that the NTP server be the announcer of the /24. And in fact, it need not be a /24, as the server should be the only occupant of the block - but it should not be covered by any globally visible aggregate, at least not one contiguous to the connectivity at the DIX.) As to the liability issue, it is easy enough to envision that someone, somewhere, is relying on time results from NTP for a life-or-death application, like a medical device, and is innocently an impacted third party in this. Sending bad NTP values could in theory be responsible for killing someone's scratch monkey... -- Brian Dickson Email: briand () chateau-briand net http://www.chateau-briand.net Tel : +1 647 234 7282
Current thread:
- Re: Open Letter to D-Link about their NTP vandalism, (continued)
- Re: Open Letter to D-Link about their NTP vandalism Hank Nussbacher (Apr 11)
- well-known NTP? (Re: Open Letter to D-Link about their NTP vandalism) Edward B. DREGER (Apr 11)
- Re: well-known NTP? Lars-Johan Liman (Apr 11)
- Re: well-known NTP? Edward B. DREGER (Apr 11)
- Re: well-known NTP? (Re: Open Letter to D-Link about their NTP vandalism) Stephane Bortzmeyer (Apr 12)
- Re: well-known NTP? (Re: Open Letter to D-Link about their NTP vandalism) Peter Dambier (Apr 12)
- Re: well-known NTP? (Re: Open Letter to D-Link about their NTP vandalism) Peter Dambier (Apr 12)
- Re: well-known NTP? (Re: Open Letter to D-Link about their NTP vandalism) Peter Dambier (Apr 12)
- Re: well-known NTP? (Re: Open Letter to D-Link about their NTP vandalism) Tony Finch (Apr 12)
- Re: Open Letter to D-Link about their NTP vandalism Martin Hannigan (Apr 11)
- Re: Open Letter to D-Link about their NTP vandalism Edward B. DREGER (Apr 11)
- Re: Open Letter to D-Link about their NTP vandalism Joe Maimon (Apr 12)
- Re: Open Letter to D-Link about their NTP vandalism Matt Ghali (Apr 13)
- Re: Open Letter to D-Link about their NTP vandalism Peter Corlett (Apr 13)
- Re: Open Letter to D-Link about their NTP vandalism Chris Kuethe (Apr 13)