[ntp:questions] NPTdate - difference in packets between -q and not?

Richard B. Gilbert rgilbert88 at comcast.net
Sat Apr 4 17:14:16 UTC 2009


David J Taylor wrote:
> Richard B. Gilbert wrote:
> []
>> Routers sold into the consumer market generally have configuration
>> options to allow or block ports and some can be configured to block
>> specific IP addresses or address families.  By default they allow
>> responses to outgoing packets and block all other incoming traffic.
> 
> Thanks, Richard.  I've not met domestic routers which require specific 
> configuration for NTP packets, but perhaps I've just been lucky.  Would 
> what you describe explain why ntpdate -q <remote> works, but nptdate 
> <remote> responds with "no server suitable for synchronization found"?
> 
> [By works, I mean he gets a response like:
> 
> server 81.171.44.131, stratum 2, offset 12.016615, delay 0.05682
> 4 Apr 08:49:58 ntpdate[3936]: step time server 81.171.44.131 offset
> 12.016615 sec]
> 
> Thanks,
> David

NTP passes through my router with no problems.  I never had to do any 
configuration to allow it.  It seems to fall under "replies to outgoing 
packets are allowed"!  The router is is a LinkSys BEFR81. YMMV!




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