From: tycampbell@comcast.net
Date: Wed Jun 23 2004 - 17:10:34 GMT-3
Thanks!!!
> Ty,
>
> Yes - think of NTP Authentication not as "I want to make sure I know who
> you are before I tell you what time it is", but instead as "I want to
> make sure I know who you are before I -BELIEVE- what time you tell me it
> is".
>
> I consider it almost like a signature in PKI - it's authenticating
> (trusting) the SENDER, not the RECEIVER. (Similar to the way ISIS
> updates are authenticated as well!).
>
> Hope this helps!
>
> Kenneth E. Wygand
> Systems Engineer, Project Services
> CISSP #37102, CCNP, CCDP, ACSP, Cisco IPT Design Specialist, MCP, CNA,
> Network+, A+
> Custom Computer Specialists, Inc.
> "The only unattainable goal is the one not attempted."
> -Anonymous
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Brian Dennis
> Sent: Tuesday, June 22, 2004 8:48 PM
> To: Ty; ccielab@groupstudy.com
> Subject: RE: NTP
>
> Ty,
> You might take a look at this white paper on NTP Authentication
> to help answer your question.
>
> http://www.internetworkexpert.com/resources/01700369.htm
>
> Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
> bdennis@internetworkexpert.com
> Internetwork Expert, Inc.
> http://www.InternetworkExpert.com
> Toll Free: 877-224-8987
> Direct: 775-745-6404 (Outside the US and Canada)
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Ty
> Sent: Tuesday, June 22, 2004 5:19 PM
> To: ccielab@groupstudy.com
> Subject: NTP
>
> quick NTP question..did research on DOC CD and a few books I have but
> couldn't
> find an answer..
>
> R1 is ntp master...has authentication
>
> R2 is server connecting to R1... has authentication
>
> R4 is configured as peer, connecting to R2
>
> with no authentication on R4 configured, R4 received the correct time.
> Should
> this have happened without R4 being configured for authentication, or is
> it
> because R4 peers to the interface of R2 that I do not need
> authentication ?
> just looking for clarification, as this was not in the lab I was
> doing...I was
> taking the lab farther on my own to experiment. (yes, even on NTP
> hahahah)
>
> Thanks!!
>
> Ty
>
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