macOS Tahoe 26: DFS namespace subfolders return "No route to host" while direct SMB connections work
Environment macOS Tahoe 26.2 (Build 25C56) Also tested with macOS 26.3 Developer Beta - same issue Windows Server 2022 DFS namespace Connection via Tailscale VPN (but also tested with direct network connection) Problem Description When connecting to a Windows Server 2022 DFS namespace from macOS Tahoe, the root namespace connects successfully, but all subfolders appear empty and return either: No route to host Authentication error (alternates inconsistently) Steps to Reproduce Set up a Windows Server 2022 DFS namespace (e.g., domain.comfs) Add DFS folder targets pointing to file servers (e.g., fs02share, fs03share) From macOS Tahoe, connect via Finder: smb://domain.com/fs Root namespace mounts successfully Issue: Subfolders show as empty or return No route to host when accessed What Works Direct SMB connections to individual file servers work perfectly: smb://10.118.0.26/sharename ✓ smb://fs02.domain.com/sharename ✓ Same DFS namespace works from Windows clients Same DFS nam