6e4f755e71
Nodes running inside WSL2 or Docker have a virtual network interface whose IP (172.16-31.x.x) is not reachable from physical machines on the LAN. The UDP socket probe for outbound IP returns this virtual IP, which gets registered with the tracker — causing downstream pipeline hops to time out with "urlopen error timed out". _warn_virtual_network_ip() now prints a clear multi-line warning at startup when the auto-detected advertise IP falls in 172.16.0.0/12, including the fix: --advertise-host <LAN-ip>. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>