v0.67.0

## Release Notes for v0.67.0

### What's New
#### Major Networking & Proxy Enhancements
- Introduced **Layer 4 (L4) capabilities (TLS/TCP/UDP)** across client, management, and proxy.  
  https://github.com/netbirdio/netbird/pull/5530
- Added **header-based authentication, access restrictions, and session idle timeout** for proxy services.  
  https://github.com/netbirdio/netbird/pull/5587
- Added support for **wildcard certificates** and improved certificate handling (read from disk if available).  
  https://github.com/netbirdio/netbird/pull/5583  
  https://github.com/netbirdio/netbird/pull/5574
- Added **require_subdomain capability** for proxy clusters.  
  https://github.com/netbirdio/netbird/pull/5628
- Improved proxy reliability with **domain switching fixes and recovery after cleanup**.  
  https://github.com/netbirdio/netbird/pull/5585  
  https://github.com/netbirdio/netbird/pull/5617

> Dashboard support and documentation update are coming soon.

#### Client Improvements
- Added **client metrics support** and enhanced observability.  
  https://github.com/netbirdio/netbird/pull/5512
- Added **health check flag** and daemon status output to `netbird status`.  
  https://github.com/netbirdio/netbird/pull/5650
- Restart engine automatically when **peer IP changes**.  
  https://github.com/netbirdio/netbird/pull/5614
- Improved **DNS handling, IPv6 formatting, and probe thread safety**.  
  https://github.com/netbirdio/netbird/pull/5603  
  https://github.com/netbirdio/netbird/pull/5576
- Added **MTU option and DNSLabels support** to embedded client.  
  https://github.com/netbirdio/netbird/pull/5550  
  https://github.com/netbirdio/netbird/pull/5493
- Refactored **auto-update workflow** and simplified container entrypoint.  
  https://github.com/netbirdio/netbird/pull/5448  
  https://github.com/netbirdio/netbird/pull/5652
- Fixed multiple issues including **duplicate logs, firewall init behavior, and container logging**.  
  https://github.com/netbirdio/netbird/pull/5609  
  https://github.com/netbirdio/netbird/pull/5621
- Additional client fixes and improvements.  
  https://github.com/netbirdio/netbird/pull/5510  
  https://github.com/netbirdio/netbird/pull/5613  
  https://github.com/netbirdio/netbird/pull/5622  
- Updated gvisor to build with Go 1.26.x.  
  https://github.com/netbirdio/netbird/pull/5447

#### Management Improvements
- Added **reverse proxy cluster APIs and domain-based targeting**.  
  https://github.com/netbirdio/netbird/pull/5611  
  https://github.com/netbirdio/netbird/pull/5612
- Improved **concurrency handling and proxy exclusions from peer approval**.  
  https://github.com/netbirdio/netbird/pull/5584  
  https://github.com/netbirdio/netbird/pull/5588

#### Proxy Enhancements
- Added **log-level flag and usage improvements**.  
  https://github.com/netbirdio/netbird/pull/5594

#### Security & Packaging
- Added **GPG signing key support for RPM packages**.  
  https://github.com/netbirdio/netbird/pull/5581

#### Miscellaneous
- Added **image build after merge to main** workflow.  
  https://github.com/netbirdio/netbird/pull/5605
- Added **netbird-tui** to community projects.  
  https://github.com/netbirdio/netbird/pull/5568

### New Contributors
- @n0pashkov made their first contribution in https://github.com/netbirdio/netbird/pull/5568
- @tham-le made their first contribution in https://github.com/netbirdio/netbird/pull/5550
- @wehagy made their first contribution in https://github.com/netbirdio/netbird/pull/5447
- @mango766 made their first contribution in https://github.com/netbirdio/netbird/pull/5603
- @Wouter0100 made their first contribution in https://github.com/netbirdio/netbird/pull/5493

**Full Changelog**: https://github.com/netbirdio/netbird/compare/v0.66.4...v0.67.0