v1.12.15

Release v1.12.15

What's New

AnyTLS Heartbeat Support

• Added configurable heartbeat option to AnyTLS outbound for maintaining connection health
• Helps detect connection failures early and keeps connections alive
• Example: "heartbeat": "11s" sends heartbeat every 11 seconds
• Option prepared for future anytls library support

Critical Fix: TCP Dial Error in Go 1.23+

• Fixed "dial tcp: invalid argument" error when starting sing-box with Go 1.23+
• Go 1.23 introduced a new KeepAliveConfig structure that replaced the old KeepAlive field
• This was causing connection failures when initializing rule-sets and other network operations
• Properly implements version-specific handling for both Go 1.23+ and earlier versions

Binaries

This release includes pre-built binaries for:

• Windows (AMD64, ARM64)
• Linux (AMD64, ARM64) - Updated with heartbeat feature and TCP dial fix
• macOS/Darwin (AMD64, ARM64)

All binaries are built with the following features:

• gVisor
• QUIC
• DHCP
• WireGuard
• uTLS
• ACME
• Clash API
• Tailscale

Linux binaries last updated: 2026-01-12 (Revision: 3673595)