[ntp:questions] Re: server's address in ntp payload?
David L. Mills
mills at udel.edu
Tue Nov 22 22:41:42 UTC 2005
Not at all to prolong this discussion, but there is a simple test to
determine if multiple addresses belong to the same machine. If a
certificate with public key works and is verified for a number of
addresses, they are all on the same machine and that machine has the
private key. I do the same thing here as you do, trusted with no
authenticate and untrusted with authentication. There is a discussion on
secure hierarchical groups on the autokey protocol page and briefing at
the NTP project page.
David Schwartz wrote:
> "Danny Mayer" <mayer at gis.net> wrote in message
> news:4380B20A.9010804 at gis.net...
>>David Schwartz wrote:
>>> For example, suppose I have two servers, A and B. A is talking to a
>>>third server C. I wish to determine if a server B is talking to is that
>>>server C, or a distinct server, D. How will a session hash help me do
>>>On the other hand, a public server ID that is globally unique *will* help
>>>do that. The source IP won't, because a single machine can have multiple
>>That's what the refid is for.
> I've seen many servers with the same refid. It does not appear to be a
> globally unique server identifier.
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