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 Post subject: Dallas NTP servers?
PostPosted: Tue Apr 28, 2009 4:18 am 
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Joined: Sat May 03, 2008 4:01 pm
Posts: 569
Website: http://www.mattnordhoff.com/
This is kind of silly, but:

I just started running ntpd on tick.mattnordhoff.com in Dallas. Are any of you running an NTP server nearby? Do you mind if I configure my ntpd to sync from it? :)

(Actually, I know someone is, cuz I saw it in the pool, but I feel like getting someone's email address from whois and emailing him just for this would be kind of creepy. :?)

Edit (2011-03-28T15:41Z): I don't actively maintain this post. You should check my website or the internal services wiki page for current information. For example, one of the IPs listed below is deprecated, though it still works.

Edit (2009-06-14T13:31:35Z): To be more clear, here's a (partial) list of what it's available at:
  • tick.mattnordhoff.com / 67.18.187.111, 2001:470:1f0f:b4::123:1
  • ipv4.tick.mattnordhoff.com (IPv4-only)
  • ipv6.tick.mattnordhoff.com (IPv6-only)
  • private.tick.mattnordhoff.com / 192.168.130.4 (Dallas private network)
  • NTP pool stats: IPv4, IPv6 (though the NTP pool site doesn't support IPv6 servers)

It's open access; just don't burn through my bandwidth or DoS me, etc.

IPv6 is through an HE tunnel, but I've got very low latency to the tunnel server.

Edit (2009-06-14T17:06:32Z): I put up a web page listing my NTP servers. (Well, currently just server, since there's only this one.)

_________________
Matt Nordhoff (aka Peng on IRC)


Last edited by mnordhoff on Mon Mar 28, 2011 11:43 am, edited 11 times in total.

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 Post subject:
PostPosted: Tue Apr 28, 2009 3:01 pm 
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Joined: Tue Apr 27, 2004 11:46 pm
Posts: 30
I just added tick.mikeshoup.com to the pool. The server is on dallas150. You're welcome to synch off of it, though give it a day or so for the time on it to stabilize.


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 Post subject:
PostPosted: Tue Apr 28, 2009 3:14 pm 
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Joined: Sat May 03, 2008 4:01 pm
Posts: 569
Website: http://www.mattnordhoff.com/
Yay, thanks. :)

Since I didn't make it clear, anyone can feel free to use my server as well. As long as you're not horribly abusive or whatever. It has more or less stabilized by now.


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 Post subject:
PostPosted: Tue Apr 28, 2009 10:48 pm 
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Joined: Sat Mar 28, 2009 4:23 pm
Posts: 415
Website: http://jedsmith.org/
Location: Out of his depth and job-hopping without a clue about network security fundamentals
I just added myself as time.jedsmith.org. Not in Dallas, but Fremont.

I have it set to sync to all Stratum 1 servers with extremely low latency, so depending on how this bandwidth works out, I might consider opening it up as a Stratum 2. I'm not using the bandwidth anyway.


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 Post subject:
PostPosted: Wed Apr 29, 2009 5:25 am 
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Joined: Sat May 03, 2008 4:01 pm
Posts: 569
Website: http://www.mattnordhoff.com/
jed wrote:
I just added myself as time.jedsmith.org. Not in Dallas, but Fremont.

I have it set to sync to all Stratum 1 servers with extremely low latency, so depending on how this bandwidth works out, I might consider opening it up as a Stratum 2. I'm not using the bandwidth anyway.


Sooo...you'd be fine if I used it, right? :)


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 Post subject:
PostPosted: Wed Apr 29, 2009 3:04 pm 
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Joined: Tue Apr 27, 2004 11:46 pm
Posts: 30
Forgot to mention, if you guys are running kernel 2.6.18, be sure to set clock independent from the host.

Set the sysctl,
xen.independent_wallclock=1


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 Post subject:
PostPosted: Wed Apr 29, 2009 3:46 pm 
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Joined: Sat Mar 28, 2009 4:23 pm
Posts: 415
Website: http://jedsmith.org/
Location: Out of his depth and job-hopping without a clue about network security fundamentals
mnordhoff wrote:
jed wrote:
I just added myself as time.jedsmith.org. Not in Dallas, but Fremont.

I have it set to sync to all Stratum 1 servers with extremely low latency, so depending on how this bandwidth works out, I might consider opening it up as a Stratum 2. I'm not using the bandwidth anyway.


Sooo...you'd be fine if I used it, right? :)


Absolutely, knock yourself out! I woke up to a 16.3 this morning, so it would appear that I am evened out. I synced fast with the quick latency to Hurricane's Stratum 1 servers.

My traffic's already picking up, too, finally I can use more than 0% of my bandwidth in a month :D


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 Post subject:
PostPosted: Wed Apr 29, 2009 4:03 pm 
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Joined: Sat Mar 28, 2009 4:23 pm
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Website: http://jedsmith.org/
Location: Out of his depth and job-hopping without a clue about network security fundamentals
mikeshoup wrote:
Forgot to mention, if you guys are running kernel 2.6.18, be sure to set clock independent from the host.


From your wording, I'm assuming that doesn't apply to pv_ops kernels?


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 Post subject:
PostPosted: Wed Apr 29, 2009 4:10 pm 
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Joined: Tue Apr 27, 2004 11:46 pm
Posts: 30
jed wrote:
From your wording, I'm assuming that doesn't apply to pv_ops kernels?

I have no idea.

I was having the problem where my clock would get set back to host time.

I would think with the pv_ops kernels, since they drift on their own, they're not synchronized to host time and it doesn't matter.


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 Post subject:
PostPosted: Wed Apr 29, 2009 6:24 pm 
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Joined: Sat Mar 28, 2009 4:23 pm
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Website: http://jedsmith.org/
Location: Out of his depth and job-hopping without a clue about network security fundamentals
time.jedsmith.org is now a Stratum 2 source: http://support.ntp.org/bin/view/Servers/TimeJedsmithOrg
Pool statistics: http://www.ntppool.org/scores/64.62.228.129

Feel free to sync against it. Fellow Linode customers get $10 off an annual subscription to UDP packets!


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 Post subject:
PostPosted: Wed Apr 29, 2009 7:40 pm 
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Senior Member

Joined: Sat May 03, 2008 4:01 pm
Posts: 569
Website: http://www.mattnordhoff.com/
jed wrote:
mikeshoup wrote:
Forgot to mention, if you guys are running kernel 2.6.18, be sure to set clock independent from the host.


From your wording, I'm assuming that doesn't apply to pv_ops kernels?


The xen sysctls don't exist on pv_ops, so whether or not you need to make the clock independent, you can't do it that way. The pv_ops kernels are known for drifting, so whether or not they should be independent, it seems they are.


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 Post subject:
PostPosted: Thu Apr 30, 2009 3:50 pm 
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Joined: Tue Apr 27, 2004 11:46 pm
Posts: 30
Added its IPv6 address to the pool! http://www.ntppool.org/scores/2001:470:1f0e:68a::2


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