</pre>
== A Xen Migration Tutorial Firewall Configuration ==
In the remainder of this chapter we will work through an example migration of Before a Xen domainU guest from one domain can be migrated it is important to ensure that the firewall settings on the destination host are configured appropriately. As outlined above, Xen uses port 8002 by default for performing migrations. If this port is blocked by the firewall on the destination host then the migration will fail with the following error message: <pre>Error: can't connect: No route to anotherhost</pre> In order to resolve this problem it is essential that the firewall on the destination host be configured to allow TCP traffic on either port 8002 or the port number specified for ''xend-relocation-port'' in the ''/etc/xen/xend-config.sxp'' files if the default value was not used.
== Preparing the Xen Migration Environment ==
<pre>
xm migrate 1 192.168.2.32 21 -l
</pre>
