Open SSTP Client

KOBAYASHI Ittoku

About this app

This is a VPN client app for Secure Socket Tunneling Protocol.

Features:
- Simple for maintainability
- No Ads
- Open source (https://github.com/kittoku/Open-SSTP-Client)

Tips:
With the app's notifications allowed, you can get error messages and disconnect easily. Also, you can connect/disconnect from Quick Settings panel.

License:
This app and its source code are under MIT License. I'll do my best, but be sure that you use this app at your own risk.

Notice:
- Only SoftEther server is officially supported.
- This app uses VpnService class to establish SSTP connections.

False positive detections:
I tested this app's apk on VirusTotal and confirmed nothing detected as of 2022-11-18. I think I made this app as secure as I can by publishing its source, but it seems that some anti-virus softwares are still warning about this app. I'm sorry to say I cannot handle all false positive detections alone. Your available options may be,

1. Ignore the alert.
2. Submit a false positive report to your anti-virus software's vendor.
3. Build this app from its source.
4. Try another SSTP client.

I hope you will achieve secure communication in some way.

Ratings and reviews

To previous comments, it works with Mikrotik! you need to export the certificate used in server settings (pem format, tick Trusted in certificate settings), and put it in a folder on the phone. Also in the app, select that folder for trusted certificates. Basic Mikrotik settings without cert work only between Mikrotiks, you need a Windows way of settings for it to work

Thank you for the effort you’ve put into developing this software. However, the problem I’m facing is that when I connect using SSTP, the VPN connection sometimes drops intermittently. After I turn the VPN off and on again, the connection is re-established. I’m not sure whether this issue comes from the Open SSTP Client app or from the MikroTik server configuration I’ve set up.

Works like a charm, to my surprise. Good job, honestly! (Used with WinSer19 RRAS)

What’s new

- Updated dependencies
- Fixed broken layout on Android 15 or newer

No need to update if the app works fine.

As always, if there is something wrong, please try reinstalling.