RE: NTP authentication

From: Kenneth Kriel (kkriel@xxxxxxxxxxxx)
Date: Thu Aug 03 2000 - 12:35:49 GMT-3

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   Gentleman,
   
   My ntp authentication seems to work fine ! Configs as follows:
   
   Router A
   
   ntp authentication-key 1 md5 xxxx
   ntp authenticate
   ntp trusted-key 1
   ntp master 1
   
   interface serial 0
   ip add 10.1.1.1 255.255.255.0
   
   
   Router B
   
   ntp authentication-key 1 md5 xxxx
   ntp authenticate
   ntp trusted-key 1
   ntp server 10.1.1.1 key 1
   
   Then after that I do a sh ntp ass det:
   
   R2#sh ntp associations det
   10.1.1.1 configured, authenticated, our_master, sane, valid, stratum 1
   ref ID .LOCL., time BD341B94.F4B37C83 (16:25:56.955 UTC Thu Aug 3
   2000)
   our mode client, peer mode server, our poll intvl 64, peer poll intvl
   64
   root delay 0.00 msec, root disp 0.03, reach 377, sync dist 28.870
   delay 57.46 msec, offset 2.7210 msec, dispersion 0.11
   precision 2**24, version 3
   org time BD341BCD.1FAC9761 (16:26:53.123 UTC Thu Aug 3 2000)
   rcv time BD341BCD.2655BF13 (16:26:53.149 UTC Thu Aug 3 2000)
   xmt time BD341BCD.178BD22C (16:26:53.091 UTC Thu Aug 3 2000)
   filtdelay = 57.46 57.33 57.60 57.68 57.50 57.59 57.63
   57.30
   filtoffset = 2.72 2.84 2.78 2.88 2.81 2.78
   2.79 2.66
   filterror = 0.02 0.99 1.97 2.94 3.92 3.94
   3.95 3.97
   
   
   !!!! check line 1 it says authenticated !!!!!
   
   
   I am using different versions of the IOS - 12 on R1 and 11.3 on R2
   
   
   Let me know if this works for you !
   
   Ken
   -----Original Message-----
   From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
   Brian S turner
   Sent: Wednesday, August 02, 2000 5:40 PM
   To: ccielab@groupstudy.com
   Subject: RE: NTP authentication
   
   I think I had the same problem, and NTP authentication only works on
   broadcast NTP configurations.
   
   If you give a specific IP address it will ignore the authentication
   
   
   
   
   
   -----Original Message-----
   From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
   John Conzone
   Sent: Sunday, July 30, 2000 11:45 AM
   To: ccielab
   Subject: NTP authentication
   
       I have 6 routers, one as NTP Master 1 and the others as NTP server
   X.X.X.X (ip of master).
   
   I have no problem getting the other 5 to pull time from the master and
   clocks all synch up.
   
       However, I cannot get authentication to work. The clients synch to
   the master regardless of whether authentication is on or not. I can't
   find any good examples of NTP authentication configuration. I'm sure
   I'm implementing wrong. Any help?
   
       Thanks!

• Next message: Mark Lewis: "RE: HSRP tracking of Frame ciruits"
• Previous message: Bert Kellerman: "Re: back-to-back BRI"
• Maybe in reply to: Sam Munzani: "RE: NTP authentication"
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