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OJsvk's avatar
OJsvk
Copper Contributor
Jun 16, 2026

WAC vMode fails validating SMB

Hi

Reviewing vMode and try add a Hyper-V 2025 (non hyperconverged) cluster with a FC SAN. Fails on Validating "SMB port accessibility".  Have gone through firewall settings and opened all neccesary ports that i can find mentioned. Even tried without FW turned off without any success so hit the wall now. WAC vMode is installed on a vm running Win2025std and in same domain as the cluster (and hosts) i try  to add. Probably some obvious thing i have missed so any suggestions?

WAC
Windows Admin Center

1 Reply

  • Jamony's avatar
    Jamony
    MCT
    Jul 09, 2026

    Hi, I would test this from the Windows Admin Center gateway itself, not only from an admin workstation. Run `Test-NetConnection <each-node-FQDN> -Port 445` for every cluster node and the cluster name, then verify forward and reverse DNS. Also confirm the Server service is running and that SMB traffic is not being filtered by endpoint security, IPsec, or a network ACL; turning off Windows Firewall would not rule those out. Because your storage is FC SAN, the validator may still be applying an SMB prerequisite intended for another vMode path. If all port tests pass, collect the WAC gateway logs and cluster validation report and raise it as a possible validation defect.