strongSwan VPN Client

F-Droid Open Source | Connectivity

4 Downloads 13 Views v2.6 12.2 MB 4.1+

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(12.2 MB)

Editor's Overview

strongSwan VPN Client is a connectivity application developed by F-Droid Open Source, packaged as a single Android APK of version 2.6 weighing in at 12.2 MB. The package targets Android 4.1+ and above. Below you'll find the publisher's own description, a quick spec sheet, and a short buyer-beware checklist so you know exactly what you're installing before tapping download.

Install Checklist

Only download through the button on this page — never from third-party mirrors or shortened links, which are the most common way malware spreads.
File size is a light 12.2 MB, so it installs quickly even on modest connections.
This build is signed by "F-Droid Open Source" — always verify the developer name matches what's listed on the app's official store page before installing an update.
After install, Android may prompt you to allow "Install from unknown sources" — approve only this one install, then revoke the permission in Settings > Apps > Special access.
We link directly to the APK file or the publisher's repository; we do not modify the binary. Always run a virus scan after any sideloaded install.

About this app

Official Android port of the popular strongSwan VPN solution.

# FEATURES AND LIMITATIONS #

Uses the VpnService API featured by Android 4+. Devices by some manufacturers seem to lack support for this - strongSwan VPN Client won't work on these devices!

Uses the IKEv2 key exchange protocol

Uses IPsec for data traffic

Full support for changed connectivity and mobility through MOBIKE (or reauthentication)

Supports username/password EAP authentication (namely EAP-MSCHAPv2, EAP-MD5 and EAP-GTC) as well as RSA/ECDSA private key/certificate authentication to authenticate users, EAP-TLS with client certificates is also supported

Combined RSA/ECDSA and EAP authentication is supported by using two authentication rounds as defined in RFC 4739

VPN server certificates are verified against the CA certificates pre-installed or installed by the user on the system. The CA or server certificates used to authenticate the server can also be imported directly into the app.

IKEv2 fragmentation is supported if the VPN server supports it (strongSwan does so since 5.2.1)

Split-tunneling allows sending only certain traffic through the VPN and/or excluding specific traffic from it

Per-app VPN allows limiting the VPN connection to specific apps, or exclude them from using it

The IPsec implementation currently supports the AES-CBC, AES-GCM, ChaCha20/Poly1305 and SHA1/SHA2 algorithms

Passwords are currently stored as cleartext in the database (only if stored with a profile)

VPN profiles may be imported from files

Supports managed configurations via enterprise mobility management (EMM)

Details and a changelog can be found in our documentation: https://docs.strongswan.org/docs/latest/os/androidVpnClient.html

# PERMISSIONS #

READ_EXTERNAL_STORAGE: Allows importing VPN profiles and CA certificates from external storage on some Android versions

QUERY_ALL_PACKAGES: Required on Android 11+ to select apps to ex-/include in VPN profiles and the optional EAP-TNC use case

# EXAMPLE SERVER CONFIGURATION #

Example server configurations may be found in our documentation: https://docs.strongswan.org/docs/latest/os/androidVpnClient.html#_server_configuration

Please note that the host name (or IP address) configured with a VPN profile in the app *must be* contained in the server certificate as subjectAltName extension.

# FEEDBACK #

Please post bug reports and feature requests via GitHub: https://github.com/strongswan/strongswan/issues/new/choose
If you do so, please include information about your device (manufacturer, model, OS version etc.).

The log file written by the key exchange service can be sent directly from within the application.

Details

Version	v2.6
Size	12.2 MB
Developer	F-Droid Open Source
Category	Connectivity
Package	org.strongswan.android
Android	4.1+
Last Updated	Oct 29, 2026
Downloads	4

Frequently Asked Questions

Is strongSwan VPN Client free to download?
Yes. The APK file linked from this page is free. The developer may offer in-app purchases once installed, but obtaining the installer itself costs nothing.

What Android version does strongSwan VPN Client require?
Android 4.1+ or newer. Installing on older devices may cause crashes or refuse to install.

Is strongSwan VPN Client safe to install?
We link to the exact APK published by F-Droid Open Source. We do not modify the file. Still, as with any sideloaded app, scan it with a reputable antivirus before opening it, and only grant permissions the app genuinely needs.

How do I update strongSwan VPN Client?
Install the newer version on top of the old one — Android will keep your data. If the signature differs, uninstall first (you may lose local progress).

Why is the app not installing?
Common causes: not enough storage, an older Android version than 4.1+, or a conflicting build already installed. Free up space, check your OS version, and uninstall any previous copy before retrying.

How to Download & Install strongSwan VPN Client

Tap the Download APK button above and save the file to your device.
Open your device Settings → Security (or Apps → Special access → Install unknown apps) and allow your file manager or browser to install unknown apps for this one file only.
Open the downloaded org.strongswan.android.apk file from your Downloads folder.
Tap Install and wait for Android to finish.
Open «strongSwan VPN Client» by F-Droid Open Source and grant only the permissions it actually needs.
Revoke the "unknown sources" permission once you are done installing.

Note: this page hosts or links to the installer only. The application name, icon and description are provided for identification. All trademarks belong to their respective owners.