nanog mailing list archives
Re: Open Letter to D-Link about their NTP vandalism
From: Simon Lyall <simon () darkmere gen nz>
Date: Tue, 11 Apr 2006 17:55:22 +1200 (NZST)
On Tue, 11 Apr 2006, Paul Vixie wrote:
simon () darkmere gen nz (Simon Lyall) writes:I've said in other forums the only solution for this sort of software is to return the wrong time (by several months). The owner might actually notice then and fix the problem.that creates new liability, and isn't realistic in today's litigious world.
Everyone here runs spam filters. Many times a day you tell a remote MTA you've accepted their email but you delete it instead. Explain the difference? I run a NTP server, The only place it is advertised is a list which says "To be used by people in DK exchange only" . Explain the difference between my blocking someones packets (which causes them to just resend), send a KOD ( ntp for "go away") packet (which is ignored) and telling them the time is "2001-11-11 11:11:11" every time they ask? People running RBLs change the access policy or return 127.0.0.1 for every query sometimes. People running public Mail relays or public DNS servers regularly block access or return bad results. NTP provides a method to tell people to go away (The KOD packet) , if a remote client ignores that and keeps flooding your (or your upstream filters) with many udp packets per-second what exactly is someone supposed to do? There is no contract between the Server operator and the abusing client, The client is abusing the access policy and they have ignored the automatic request to go away. -- Simon J. Lyall | Very Busy | Web: http://www.darkmere.gen.nz/ "To stay awake all night adds a day to your life" - Stilgar | eMT.
Current thread:
- Re: Open Letter to D-Link about their NTP vandalism, (continued)
- Re: Open Letter to D-Link about their NTP vandalism Nicholas Suan (Apr 07)
- RE: Open Letter to D-Link about their NTP vandalism David Hubbard (Apr 07)
- RE: Open Letter to D-Link about their NTP vandalism Todd Vierling (Apr 07)
- RE: Open Letter to D-Link about their NTP vandalism goemon (Apr 07)
- RE: Open Letter to D-Link about their NTP vandalism Church, Chuck (Apr 08)
- Re: Open Letter to D-Link about their NTP vandalism Nicholas Suan (Apr 08)
- Re: Open Letter to D-Link about their NTP vandalism Valdis . Kletnieks (Apr 09)
- Re: Open Letter to D-Link about their NTP vandalism Simon Lyall (Apr 10)
- Re: Open Letter to D-Link about their NTP vandalism Paul Vixie (Apr 10)
- Re: Open Letter to D-Link about their NTP vandalism Simon Lyall (Apr 10)
- Re: Open Letter to D-Link about their NTP vandalism Matt Ghali (Apr 10)
- Re: Open Letter to D-Link about their NTP vandalism Matthew Black (Apr 11)
- Re: Open Letter to D-Link about their NTP vandalism Joe Maimon (Apr 11)
- Re: Open Letter to D-Link about their NTP vandalism Matt Ghali (Apr 11)
- Re: Open Letter to D-Link about their NTP vandalism Nicholas Suan (Apr 08)
- Re: Open Letter to D-Link about their NTP vandalism Alain Hebert (Apr 10)
- Re: Open Letter to D-Link about their NTP vandalism Joseph S D Yao (Apr 11)
- Re: Open Letter to D-Link about their NTP vandalism Alain Hebert (Apr 11)
- Re: Open Letter to D-Link about their NTP vandalism Paul Vixie (Apr 11)
- Re: Open Letter to D-Link about their NTP vandalism Alain Hebert (Apr 11)
- Re: Open Letter to D-Link about their NTP vandalism M. David Leonard (Apr 12)