Re: ntp authentication

in NTP .. authentication is performed by clients ..... client will
authenticate from which server to take the time .

If NTP is not checking for auth ( no authentication ) ; whatever
server is sending is not taken in account

HTH
Gaurav Madan

On Wed, Jul 14, 2010 at 10:52 PM, Oskar <xyz7412369_at_yahoo.ca> wrote:
> Hello,
>
> I am playing with NTP authentication and it is not working as I axpect. Here is
> the configuration:
>
> R1, master ntp server, authentication configured.
> ntp authentication-key 1 md5 0802455D0A16 7
> ntp master 2
>
> R2, ntp client with authentication, but wrong key configured:
> ntp authentication-key 1 md5 13243531 7
> ntp authenticate
> ntp trusted-key 1
> ntp clock-period 17179862
> ntp server 131.1.12.1 key 1
>
> R3, ntp client, NO authentication configured:
> ntp server 131.1.13.1
>
> As a result:
> R2 does not get time from R1 which is expected.
> But R3 gets time from R1 even if it has no authentiocation configured:
> R3#sh ntp status
> Clock is synchronized, stratum 3, reference is 131.1.13.1
>
> Why R3 gets time from R1 then ?
>
> Thanks,
>
>
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Received on Wed Jul 14 2010 - 23:03:59 ART