11-27-2025 12:26 AM
Hi Everyone,
We are currently experiencing an issue where WhatsApp on iOS devices is unable to connect, while Android devices and laptops work without any problems.
After some investigation and troubleshooting, we found that even after allowing all WhatsApp applications along with their dependencies (including SSL and web-browsing), the issue persisted. However, when we temporarily allowed unknown-tcp, WhatsApp on iOS started working.
Of course, allowing all unknown-tcp traffic is not a viable long-term solution for the entire network.
What should be our next step?
Could this be related to an App-ID signature mismatch or an identification issue?
11-27-2025 02:28 AM
Hi @Star_Man ,
I have seen similar reports come in regarding this misclassification.
Please ensure your firewall has installed the latest Applications and Threats content package (specifically 9042-9771 or newer).
If the issue persists after updating the content package, I recommend submitting a ticket to TAC.
They will need to capture and analyze the payload to determine why the traffic is being misclassified.
Kind regards,
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