nanog mailing list archives
Re: TWC (AS11351) blocking all NTP?
From: Stephane Bortzmeyer <bortzmeyer () nic fr>
Date: Mon, 3 Feb 2014 10:55:00 +0100
On Mon, Feb 03, 2014 at 04:09:39AM +0000, Dobbins, Roland <rdobbins () arbor net> wrote a message of 20 lines which said:
I also think that restricting your users by default to your own recursive DNS servers, plus a couple of well-known, well-run public recursive services, is a good idea - as long as you allow your users to opt out.
That's a big "as long". I agree with you but I'm fairly certain that most ISP who deny their users the ability to do DNS requests directly (or to run their own DNS resolver) have no such opt-out (or they make it expensive and/or complicated). After all, when outside DNS is blocked, it is more often for business reasons (forcing the users to use a local lying resolver, with ads when NXDOMAIN is returned) than for security reasons.
Current thread:
- Re: TWC (AS11351) blocking all NTP?, (continued)
- Re: TWC (AS11351) blocking all NTP? Valdis . Kletnieks (Feb 03)
- Re: TWC (AS11351) blocking all NTP? Brian Rak (Feb 03)
- 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)