Re: NTP, ntpdate, and ISP-based firewall

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Don Levey wrote:
I've been trying to set up an NTP server within my own local network, and
have it sync with an outside server.  It appears that my ISP is blocking NTP
access; I can get a sync only when I run ntpdate -u.

While I could do that manually, or even set it up as a cron job, I'd rather
set up ntpd to do this at intervals if possible.  Any suggestions as to how
I can configure ntpd to work correctly, and/or pointers to tutorials that
might help?

What does your /etc/ntp.conf file look like currently? Are you sure ntp packets are going out but not returning? ('tcpdump port ntp' or 'tcpdump port 123' might help debug this.)

On a side note, what kind of fascist, unfriendly ISP blocks NTP traffic? Correct timekeeping is essential for a properly run network (especially if you have shared filesystems or want to be able to merge logfiles).




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