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Google.com intermittent connectivity

MySuperSonicMySuperSonic Newbie ✭
in Mid Range Firewalls

Hello all,


Our enterprise network has experienced a very odd issue: users some times cannot browse google.com on any browsers. It is a network wide issue.

  1. We confirmed that when directly connecting to Modem, google.com works
  2. Cellphone users can browse google.com when using cellular data
  3. End users can ping google.com
  4. This issue happens more than 10 times a day. Every time last about 5-30 minutes
  5. All the other websites work as expected.
  6. Firewall packet monitor does not capture any data from my IP.
  7. I used wireshark to capture packets and keep refreshing browse to re-connect google.com. There are a lot of TCP RST, and re-transmission.

I pasted some screenshots here and share anything that will help. Much appreciated!

image.png
image.png

our prtg network monitor shows google.com http sensor downtime

image.png

wireshark

image.png


Category: Mid Range Firewalls
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