b4 Files

[1.26.0] - 2025-12-22

• ADDED: Upload Custom Payloads - upload your own binary payload files instead of capturing from live traffic (avilable in the Settings -> Capture tab).
• ADDED: Use Captured Payloads - new My own Payload file option in Faking settings lets you use previously captured or uploaded payload binaries.
• CHANGED: UDP traffic now only listens on port 443 (QUIC) by default instead of all UDP ports, reducing unnecessary packet processing.
• ADDED: Custom UDP port filtering - configure specific ports per set using the UDP port filter option, and B4 will automatically listen only on those ports.
• ADDED: Live firewall rule updates - changing UDP ports, connection limits, or other core settings in the web UI now takes effect immediately without restarting the service.
• FIXED: B4 no longer crashes on startup when geodat files (geosite.dat/geoip.dat) were manually deleted.
• FIXED: Re-downloading geodat files now properly reloads all domain and IP targets without requiring a service restart.
• FIXED: IPv6 bypass settings now work correctly - disabling IPv6 in config actually disables IPv6 packet processing.

Full Changelog: https://github.com/DanielLavrushin/b4/compare/v1.25.4...v1.26.0