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The most likely cause of this problem is that the firewall on the destination host (i.e the server to which the guest domain is to be migrated) has not
be configured to allow traffic on the port used by Xen to perform relocations.
By default Xen performs guest migrations using port 8002. It is possible, however, to configure another port for this service by changing the value assigned to the ''xend-relocation-port'' setting in the ''/etc/xen/xend-config.sxp'' configuration file. If this
setting is commented out as shown below then the system will default to 8002:
If, on the other hand the line is uncommented and set to different value as shown below then the firewall needs to allow traffic on this port: