For clarity, I am not referring to the actual iPhone creating the VPN, I am referring to my Windows 10 Pro laptop creating the VPN when my iPhone is simply being used for personal hotspot. All other functions of personal hotspot appear to be fine - it's just that the phone is blocking the VPN passthrough. I have tried personal hotspot using USB, Wifi and Bluetooth but no success.

I can confirm this by using my wife's iPhone 6 running iOS 11 and personal hotspot allows the VPN connection. There have been no changes to the work VPN. This was not an issue on iOS 12 or iOS 11.

I've also installed/re-installed forticlient many times.Using my iPhone 8 Plus running iOS 13.2.3, I am unable to connect to my work VPN using the iPhone personal hotspot. I don't have complete data, but everything was fine until iOS 13 update. I have reset, factory reset my mobile device and still receive the same error code. I've established connections on my domestic internet service, various colleagues mobile hotspots (both on the same cellular network and different). Please check the password, client certificate, etc.' so I assume it's talking to something internally. If I intentionally enter foo bar credentials, I get the following error message: 'The VPN connection terminates unexpectedly! (Error Code: -121)' (I've searched online and can't find anything relating to this specific error code, but I don't have access to the corporate knowledge-base, so I'm not sure if there's something I'm missing. Each attempt returns the following error: Since upgrading to iOS 13.x I cannot establish a VPN connection via my cellular network hotspot. I have Forticlient 6.0.8.149 installed on my mac OS 10.14.5 and I'm trying to establish a VPN via mobile hotspot (iPhone Xs 13.1.3) I've tried to find any documentation that might help diagnose my issue but I've come up short. Hi, apologies if this isn't the place for this.

Vpn not working on iphone hotspot