Monitoring station seems to hate my server all of a sudden


Just an update:

So I had a Comcast Business tech out yesterday… we checked signal to the amp right outside our location (which looked good), and we also replaced everything (line wise) from the ped to the modem, even a new tap.

While I did see some sort of an uptick after we did so for a few hours, last night and today are proving that this was just a coincidence. Still seeing issues with this location. Random ups and downs like others.

I asked about upstream issues, but the tech was unaware of any either locally or at our backbone connection in Chicago. This doesn’t really surprise me, as the standard answer from Comcast always seems to be - “well, nobody else is complaining”. But I’m sure that not many others are running the services we are running either, soooo, I always take “nobody else” with a grain of salt.

@curbynet , I joined the #ntp channel but haven’t seen anymore chatter about upstream IL CB issues. Have you seen anything else / further developments on that elsewhere? Just curious if anyone with enough “clout”
or an insider had gotten wind of it yet?

Thanks all!


Looking at my graphs and @tebeve 's, it seems like things are improving, albeit slowly. The monitoring station’s view of my Comcast server has been stable since the 8th, but my Linode is still having issues, although the score has been above 0 most of the time in the past few days.

I’m not privy to “behind the scenes” activity either. If anyone knows more, please let us know!


Something is apparently up. Our NTP server have been in the pool for only about a month, but yesterday its score plummeted to well below zero. I was initially confused since I couldn’t find any obvious reasons for it, but when you look at, the probes graph is telling. The big dip on March 12 coincides with our own dip the same day.

Not sure what’s happening, but something’s broken somewhere.


At this point, I don’t know whether this thread should be broken up into separate topics, as there seem to be multiple issues involved. The first was the apparent connectivity issues from the monitoring station(s) to several of our servers.

The second was the graphing issues that started on the 12th. If you look at your graphs or the graphs that other posters linked above, you’ll notice a conspicuous lack of green dots on the graphs during the “dip” times. I mention the 12th because the lack of dots was seen then as well.

Going back to the first problem addressed in this thread, my server saw a score dip for the first time in several days today. It was registered just after the “missing dots” problem was resolved. Perhaps something was resetting/reinitializing itself and the score dips were side effects?

Linking again for reference: