> 
> Reachability for all the listed timeservers is 0, which means you have
> never had a successful connect. Check your firewall logs, or do an
> ntptrace. Chances are, the packets are being rejected at your side or
> theirs.

I did a ntptrace, It gives:
[root@zeus lts_kmap]#  ntptrace -d -v -t 40 ntp.tuxfamily.net
DoTransmit(80.67.179.2)
DoTransmit to 80.67.179.2
timeout
[ repeated 4 times ]
sherkan.tuxfamily.net:  *Timeout*

I think the problem lies on my side because these are public timeservers for my
zone. I think I have no firewall on my computer. And I don't administer the one
which are on the way. However, it seems to me that they accept any outgoing
connection. Is there a need for ingoing connection for ntp ? 

What could I do to understand what happens ? Is there any tool which could be
used to follow a packet and know where a firewall blocked it ?

Pat



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