nanog mailing list archives
Re: Filter NTP traffic by packet size?
From: Damian Menscher <damian () google com>
Date: Fri, 21 Feb 2014 13:30:05 -0800
On Fri, Feb 21, 2014 at 1:22 PM, Cb B <cb.list6 () gmail com> wrote:
On Thu, Feb 20, 2014 at 2:12 PM, Damian Menscher <damian () google com> wrote:On Thu, Feb 20, 2014 at 1:03 PM, Jared Mauch <jared () puck nether net>wrote:You may also want to look at filtering UDP/80 outright as well, as thatiscommonly used as an "I'm going to attack port 80" by attackers thatdon'tquite understand the difference between UDP and TCP.Please don't filter UDP/80. It's used by QUIC ( http://en.wikipedia.org/wiki/QUIC).The folks at QUIC have been advised to not use UDP for a new protocol, and they would be very well advised to not use UDP:80 since that is a well known target port used in the DDoS reflection attacks.
Please suggest which protocol has less blocking on the internet today (keeping in mind the full end-to-end stack of CPE, various ISPs, country-level proxies, backbone providers, etc). Damian
Current thread:
- Filter NTP traffic by packet size? Edward Roels (Feb 20)
- Re: Filter NTP traffic by packet size? John Weekes (Feb 20)
- Re: Filter NTP traffic by packet size? Jared Mauch (Feb 20)
- Re: Filter NTP traffic by packet size? Damian Menscher (Feb 20)
- Re: Filter NTP traffic by packet size? TGLASSEY (Feb 20)
- Re: Filter NTP traffic by packet size? Cb B (Feb 21)
- Re: Filter NTP traffic by packet size? Damian Menscher (Feb 21)
- Re: Filter NTP traffic by packet size? Cb B (Feb 21)
- Re: Filter NTP traffic by packet size? Seth Mattinen (Feb 21)
- Re: Filter NTP traffic by packet size? Saku Ytti (Feb 22)
- Re: Filter NTP traffic by packet size? Carsten Bormann (Feb 22)
- Re: Filter NTP traffic by packet size? Cb B (Feb 22)
- Re: Filter NTP traffic by packet size? Carsten Bormann (Feb 22)
- Re: Filter NTP traffic by packet size? Randy Bush (Feb 22)
- Re: Filter NTP traffic by packet size? Nick Hilliard (Feb 22)
- Re: Filter NTP traffic by packet size? Paul Ferguson (Feb 22)
- Re: Filter NTP traffic by packet size? Chris Laffin (Feb 22)
- Re: Filter NTP traffic by packet size? Jared Mauch (Feb 20)
- Re: Filter NTP traffic by packet size? John Weekes (Feb 20)