How to Fix StrongSwan VPN “Untrusted Certificate” Issue ?
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Zyxel_Stanley
Posts: 1,435 
Zyxel Employee
Zyxel Employee
in VPN
Question:
A client using StrongSwan VPN encountered an issue where the VPN stopped working. The log indicated a problem with the VPN certificate being untrusted.
Answer:
(1) Remove the existing VPN profile from the StrongSwan app on the device.
(2) Re-download the VPN profile from the Nebula server.
(3) Re-import the downloaded VPN profile to the StrongSwan app.
(4) If the issue persists, uninstall and reinstall the StrongSwan app.
(5) Reboot the device to ensure clean initialization.
After performing the steps mentioned above, the user confirmed that the issue was resolved successfully. If you encounter similar problems.
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