North American Network Operators Group
Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical

Re: pool.ntp.org NTP servers

  • From: Matt Zimmerman
  • Date: Tue Jun 10 16:59:33 2003 
On Sun, Jun 08, 2003 at 12:15:19AM -0400, Sean Donelan wrote:

> As a general principle, having an open UDP port exposes your network
> infrastructure to either something like a NTP worm (if one was written)
> or a great attack amplifier by spoofing NTP queries from a victim's IP
> address.  You can search Google for other NTP specific security issues.

I don't see how a (unicast) NTP service could be used as an effective
amplifier, though it could be used to conceal the source of a ~1:1 DDoS
attack.

-- 
 - mdz