nanog mailing list archives
Re: Open Letter to D-Link about their NTP vandalism
From: Valdis.Kletnieks () vt edu
Date: Mon, 10 Apr 2006 00:05:17 -0400
On Sat, 08 Apr 2006 11:17:20 CDT, Nicholas Suan said:
It would be nice if it were that simple. However there are an annoyingly large amount of poorly-written clients whose polling ratios do not decrease after they get no response from the server. There have even been some clients whose polling rate *increases* after they get no response.
One particular piece of crapware of the tucows archive variety would retry once per second if it hadn't heard a response - but a ICMP Port Unreachable would trigger an *immediate* query, so it would basically re-query at whatever the RTT for the path was. Said software was why instead of leaving NTP disabled on the before-mentioned box, and hoping that at least *some* people would clue in from the ICMP reply, I had to basically firewall and drop the packets entirely.
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Current thread:
- Re: Open Letter to D-Link about their NTP vandalism, (continued)
- Re: Open Letter to D-Link about their NTP vandalism Simon Lockhart (Apr 08)
- Re: Open Letter to D-Link about their NTP vandalism Jared Mauch (Apr 08)
- Re: Open Letter to D-Link about their NTP vandalism Per Gregers Bilse (Apr 07)
- 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)