[Bug]: Cannot access the internet when using VPN

[lomirus]

Problem description

Under normal circumstances, Termux can access the network as expected.

When I launch the VPN, the termux cannot access the internet:

To rule out VPN as the problem, here are two pieces of evidence:

1. All other apps except Termux can access the network normally
2. Even when I select the Direct Mode in the VPN app settings, termux cannot access the internet either.

In addition, the ping command can receive the response:

Steps to reproduce the behavior.

I can always reproduce it on my phone, but don't know how to reproduce it on others users' phones.

My phone uses PixelExperience 13 Plus (Android 13) a week ago. Then I flashed it into crDroid 10 (Android 14), and that's when this problem appeared. I wonder if it's related to the ROM, so I just flashed my phone again into LineageOS 21 (Android 14), but it still reproduced the problem.

What is the expected behavior?

It can access the internet.

System information

• Termux application version: 0.118.1
• Android OS version: Android 14
• Device model: KB2000

[sylirre]

Termux doesn't manage network on its own, so the networking fixes from our side aren't really possible.

As frequent user of NordVPN, ProtonVPN and few other VPN apps, I would say that never had such issue myself. Maybe because I don't use exotic VPN protocols.