https://community.cisco.com/t5/webex-meetings-and-webex-app/webex-app-network-connection-issue/m-p/5348664#M12273 <P>Hi all,<BR />we’re seeing recurring issues with the Webex App across multiple users (both office and home). Looking for pointers to known issues, best practices, or checks we should run.</P><DIV class="">&nbsp;</DIV><P>Symptoms</P><UL><LI>File/image sends intermittently fail; messages/status updates can be delayed by minutes.</LI><LI>Webex intermittently shows “Connection lost”; at the same time the entire internet becomes extremely slow/unreachable for 1–2 minutes (even Google).</LI><LI>On startup, we occasionally see a “Language package could not be installed”–type error; the UI then appears partly German/partly English. Restart usually helps.</LI><LI>Some users report Webex won’t come online after establishing OpenVPN; restarting Webex (sometimes also the VPN) resolves it.</LI></UL><P>Environment</P><UL><LI>Windows clients; Webex App up to date (Nov build, e.g., 45.11.x).</LI><LI>Webex traffic is designed “direct to Internet” (split tunnel), not routed through VPN.</LI><LI>Issues occur both on corporate network and in home offices; multiple users affected.</LI></UL><P>Observations so far</P><UL><LI>The 1–2 minute freezes look like general connectivity stalls; Webex exposes this most visibly on image/file sends and language package/CDN downloads.</LI><LI>One home user reported a simultaneous incident; their local internet otherwise looked fine.</LI></UL><DIV class="">&nbsp;</DIV><P>Questions for the community</P><OL><LI><P>Are there known issues with recent Webex App versions that:</P><UL><LI>block language package/CDN downloads, or</LI><LI>cause temporary messaging/image upload outages, especially when HTTPS inspection/content filters are in place?</LI></UL></LI><LI><P>Which domains/CDNs must be reachable “clean” (no SSL inspection/no proxy manipulation) for Webex App?</P></LI><LI><P>Any experience with Check Point web filter/HTTPS inspection + Webex that could explain 1–2 minute stalls (e.g., QUIC/HTTP/3, SNI handling, TLS handshake/resumption, certificate pinning)?</P></LI></OL><P>We’d appreciate any known bugs, best-practice configs for Check Point/load balancers, or a pointer to the current “Network Requirements for Webex Services” documentation. Happy to test concrete measures (bypass rules, QUIC off, MTU adjustments, etc.) and provide logs. Thanks!</P> Thu, 20 Nov 2025 11:42:02 GMT Andreas Goettl 2025-11-20T11:42:02Z https://community.cisco.com/t5/webex-meetings-and-webex-app/webex-app-network-connection-issue/m-p/5348664#M12273 <P>Hi all,<BR />we’re seeing recurring issues with the Webex App across multiple users (both office and home). Looking for pointers to known issues, best practices, or checks we should run.</P><DIV class="">&nbsp;</DIV><P>Symptoms</P><UL><LI>File/image sends intermittently fail; messages/status updates can be delayed by minutes.</LI><LI>Webex intermittently shows “Connection lost”; at the same time the entire internet becomes extremely slow/unreachable for 1–2 minutes (even Google).</LI><LI>On startup, we occasionally see a “Language package could not be installed”–type error; the UI then appears partly German/partly English. Restart usually helps.</LI><LI>Some users report Webex won’t come online after establishing OpenVPN; restarting Webex (sometimes also the VPN) resolves it.</LI></UL><P>Environment</P><UL><LI>Windows clients; Webex App up to date (Nov build, e.g., 45.11.x).</LI><LI>Webex traffic is designed “direct to Internet” (split tunnel), not routed through VPN.</LI><LI>Issues occur both on corporate network and in home offices; multiple users affected.</LI></UL><P>Observations so far</P><UL><LI>The 1–2 minute freezes look like general connectivity stalls; Webex exposes this most visibly on image/file sends and language package/CDN downloads.</LI><LI>One home user reported a simultaneous incident; their local internet otherwise looked fine.</LI></UL><DIV class="">&nbsp;</DIV><P>Questions for the community</P><OL><LI><P>Are there known issues with recent Webex App versions that:</P><UL><LI>block language package/CDN downloads, or</LI><LI>cause temporary messaging/image upload outages, especially when HTTPS inspection/content filters are in place?</LI></UL></LI><LI><P>Which domains/CDNs must be reachable “clean” (no SSL inspection/no proxy manipulation) for Webex App?</P></LI><LI><P>Any experience with Check Point web filter/HTTPS inspection + Webex that could explain 1–2 minute stalls (e.g., QUIC/HTTP/3, SNI handling, TLS handshake/resumption, certificate pinning)?</P></LI></OL><P>We’d appreciate any known bugs, best-practice configs for Check Point/load balancers, or a pointer to the current “Network Requirements for Webex Services” documentation. Happy to test concrete measures (bypass rules, QUIC off, MTU adjustments, etc.) and provide logs. Thanks!</P> Thu, 20 Nov 2025 11:42:02 GMT https://community.cisco.com/t5/webex-meetings-and-webex-app/webex-app-network-connection-issue/m-p/5348664#M12273 Andreas Goettl 2025-11-20T11:42:02Z