nanog mailing list archives
Re: TWC (AS11351) blocking all NTP?
From: John Kristoff <jtk () cymru com>
Date: Mon, 3 Feb 2014 16:21:34 -0600
On Mon, 03 Feb 2014 16:49:37 +1300 Geraint Jones <geraint () koding com> wrote:
We block all outbound UDP for our ~200,000 Users for this very reason (with the exception of some whitelisted NTP and DNS servers). So far we have had 0 complaints
I've heard this sort of absence of complaint statement used to justify some sort of truth claim about how to operate a network a number of times before. There is a certain appeal to it, particularly in cases such as this and for certain types of networks and operators, but if nothing else, for those that do it, I would also like to see some additional analysis about what is being filtered. It leaves many unconvinced and left to conjecture what the right approach is otherwise. If you have done that analysis or if you could make available some of that data for a research project, it would be very helpful for everyone to see what the measurable effect is. It would also make for a useful research project. John
Current thread:
- Re: TWC (AS11351) blocking all NTP?, (continued)
- Re: TWC (AS11351) blocking all NTP? Dobbins, Roland (Feb 03)
- Re: TWC (AS11351) blocking all NTP? Brian Rak (Feb 03)
- Re: TWC (AS11351) blocking all NTP? Dobbins, Roland (Feb 03)
- Message not available
- Re: TWC (AS11351) blocking all NTP? Larry Sheldon (Feb 02)
- Re: TWC (AS11351) blocking all NTP? Cb B (Feb 02)
- Re: TWC (AS11351) blocking all NTP? Geraint Jones (Feb 02)
- Re: TWC (AS11351) blocking all NTP? Dobbins, Roland (Feb 02)
- Re: TWC (AS11351) blocking all NTP? Dobbins, Roland (Feb 02)
- Re: TWC (AS11351) blocking all NTP? Stephane Bortzmeyer (Feb 03)
- Re: TWC (AS11351) blocking all NTP? Dobbins, Roland (Feb 03)
- Re: TWC (AS11351) blocking all NTP? John Kristoff (Feb 03)
- Re: TWC (AS11351) blocking all NTP? Peter Phaal (Feb 03)
- Re: TWC (AS11351) blocking all NTP? Christopher Morrow (Feb 03)
- Re: TWC (AS11351) blocking all NTP? Peter Phaal (Feb 03)
- Re: TWC (AS11351) blocking all NTP? Christopher Morrow (Feb 03)
- Re: TWC (AS11351) blocking all NTP? Peter Phaal (Feb 03)
- Re: TWC (AS11351) blocking all NTP? Christopher Morrow (Feb 03)
- Re: TWC (AS11351) blocking all NTP? Glen Turner (Feb 03)
- Re: TWC (AS11351) blocking all NTP? Christopher Morrow (Feb 03)
- Re: TWC (AS11351) blocking all NTP? Jay Ashworth (Feb 03)
- Re: TWC (AS11351) blocking all NTP? Peter Phaal (Feb 03)