Bug 510223

Summary: KDE Connect Android fails to ping devices via IPv6 link-local addresses.
Product: [Applications] kdeconnect Reporter: BryanLiang <liangrui.ch>
Component: android-applicationAssignee: Albert Vaca Cintora <albertvaka>
Status: REPORTED ---    
Severity: normal CC: andrew.g.r.holmes
Priority: NOR    
Version First Reported In: 25.08.1   
Target Milestone: ---   
Platform: Android   
OS: Android 14.x   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description BryanLiang 2025-10-04 12:29:27 UTC 
SUMMARY
When using KDE Connect android client to add a device by its IPv6 link-local address, the app displays “Unable to ping device”. But the same IPv6 address can be successfully pinged from the same Android phone using other applications and the devices are actually reachable and can communicate successfully over IPv6.


STEPS TO REPRODUCE
1. Connect two devices (e.g. an Android phone and a PC) to the same Wi-Fi network.
2. On the Android device, open KDE Connect → Setting Menu → Add device by IP.
3. Enter the target device’s IPv6 link-local address (for example, fe80::1234:1122:3322:1111)
4. Observe the connection status.

OBSERVED RESULT
1. KDE Connect shows “Unable to ping device”.
2. Two devices are actually connected successfully.

EXPECTED RESULT
KDE Connect should recognize that the device is reachable and not report a ping failure when IPv6 communication is functioning correctly.


SOFTWARE/OS VERSIONS
PC Side:
Operating System: Arch Linux 
KDE Plasma Version: 6.4.5
KDE Frameworks Version: 6.18.0
Qt Version: 6.9.2
Kernel Version: 6.16.10-arch1-1-cjktty (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 5800H with Radeon Graphics
Memory: 16 GiB of RAM (13.5 GiB usable)
Graphics Processor: AMD Radeon Graphics

Android Side:
Android 14.0
KDE Connect 1.33.5


ADDITIONAL INFORMATION
Screenshot of kdeconnect android and other network tools:
https://sm.ms/image/RPtXIoiypeCWNOw
https://sm.ms/image/vb5qAWn87Ck6UZa
https://sm.ms/image/vyLAzOPwHofReTm