Table of Contents IssueImpactResolutionAdditional references
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Windows Server 2012
One or more firewall ports needed by iSCSI is not open.
ISCSI initiators will be unable to access block resources due to blocked network traffic by the firewall.
Verify all firewall ports needed by iSCSI are open using Group Policy or Windows Firewall.
iSCSI_Target_Overview - Topic Overview