My connection has been dropping out fairly regularly so I wrote a scheduled task yesterday to ping google's DNS server every 5 minutes and record the result, so I have a note of when it's happening in case we need to talk to the ISP about it. However, after a few hours, every ping started failing.

What could be causing this, and is it likely to be something out of my control e.g. a fault on the ISP's end?

Some details:

  • All computers on the network have this problem now
  • I can ping within the network, just not anything outside it
  • I've tried restarting/reconnecting the computers and the router to no effect
  • Are other connections also failing from inside to outside? Can you resolve DNS using Google's dns nslookup google.com – prateek61 Jan 5 '18 at 18:49
  • 1
    You must talk with ISP. I've seen exactly same problem & ISP solved that. Try to use tracert to trace any IP address (e.g. Google.com) and find the faulty hop. – Biswapriyo Jan 5 '18 at 19:06
  • Is there a specific error that is occuring? – multithr3at3d Jan 5 '18 at 20:15
  • It's fixed itself now. I suppose it must have been the ISP. – Tharwen Jan 5 '18 at 21:12

If everything is stable and works within you network 100% when the issue occurs, ISP seems the way to go, however to rule out further if possible:

  • Have a wireshark capture running overnight to see what is catched when ping fails.
  • Try pinging a different IP.

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