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Newcomer
September 26, 2025
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zoom captive portal

  • September 26, 2025
  • 2 replies
  • 6 views

Hi we are using zoom in our environment, however we see traffic to this url "captive2.onzoom.com" is blocked by our firewalls, I would like to know when this will trigger and what process triggers this url

Best answer by Ray_Harwood

Welcome to the Zoom Community, @ironsecurity.

 

For questions about why your firewalls block a URL, you’d need to ask your organization’s network staff.

 

When I access that specific URL you provided, I get only an “OK” response.

 

When accessing OnZoom.com, I’m redirected to https://on.zoom.us, and get the full OnZoom screen. Note that OnZoom is only available in the US, and attempts to access it from outside the US are blocked by Zoom. If you are inside the US and being blocked, that’s most likely from your firewall. See this for additional info:

https://explore.zoom.us/en/event_participant_tou/ 

2 replies

Ray_Harwood
Community Super Champion | Customer
Community Super Champion | Customer
September 26, 2025

Welcome to the Zoom Community, @ironsecurity.

 

For questions about why your firewalls block a URL, you’d need to ask your organization’s network staff.

 

When I access that specific URL you provided, I get only an “OK” response.

 

When accessing OnZoom.com, I’m redirected to https://on.zoom.us, and get the full OnZoom screen. Note that OnZoom is only available in the US, and attempts to access it from outside the US are blocked by Zoom. If you are inside the US and being blocked, that’s most likely from your firewall. See this for additional info:

https://explore.zoom.us/en/event_participant_tou/ 

MGSR
Community Manager
Community Manager
October 2, 2025

Hi @ironsecurity !

Did you see the previous response from @Ray_Harwood?
If it has resolved your inquiry, please press Accept as Solution.

If you need further assistance, please let us know.

Have a great day!

MGSR
Community Manager
Community Manager
October 10, 2025

Hi @ironsecurity!

Given the time elapsed since we last heard from you, I've taken the liberty of marking the provided answer as the solution.

If you need further assistance, please let us know.

Have a fantastic day!