The following network ports must be opened to ensure proper communication of the Veeam backup server with the VM guest OS system during application-item restore.
Veeam backup server
Microsoft SQL VM guest OS
Port used for communication with the Microsoft SQL Server installed inside the VM.
1434 and other
Exact port numbers depends on configuration of your Microsoft SQL Server. To learn more, see http://msdn.microsoft.com/en-us/library/cc646023.aspx#BKMK_ssde.
The following table describes range of ports opened by Veeam Backup & Replication for iSCSI traffic during restore to the original VM. See How It Works for details.
iSCSI initiator: target remote machine to which application items are restored, or staging Microsoft SQL Server
iSCSI target - machine running Veeam Explorer
3260 - 3270
Range of ports for iSCSI traffic. During restore the iSCSI initiator connects to the iSCSI target over one port from the range. Ports are open only during application item restore (Veeam Explorer session).