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xen-users
Re: [Xen-users] Xen forwarding port to VM
Codecr wrote:
> Hi!!
>
> I'm being using xen with great sucess, now I want to expose a port in one VM
> to the outside world. The VM is a Windows 2003 server and I want to open the
> port 3389.
>
> I am being searching but I can't find the rule that I need to add to
> iptables to do so. The interface for the VM is vif9.0 with internat IP
> 192.168.1.77. The xen is running in bridge mode.
If you're running in bridge mode, domU should have its own MAC address
and IP address, and shouldn't really be affected by iptables rules,
unless you're blocking all net traffic to the virtual interface (which
your rules don't seem to be doing). Check that the virtual device
exists and can be seen from the outside world (i.e ping it, nmap it
etc). If these work, then the lack of rdp on the Windows server is due
to the Windows config, not the Dom0 config.
If you're actually using NAT, then you probably needing to use the PRE
and POSTROUTING tables. The following should be enough to get it all
working:
echo "1" > /proc/sys/net/ipv4/ip_forward
iptables -t nat -A POSTROUTING -s 192.168.1.77 -j MASQUERADE
iptables -A PREROUTING -t nat -p tcp -i eth0 --dport 3389 -j DNAT --to
192.168.1.77:3389
Note that this will 'redirect' 3389 from dom0 to the IP of the
appropriate domU.
Matthew
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