Re: [Xen-users] Networking from domu to the outside

[Marcus Brown <marcusbrutus@xxxxxxxxxxxxxxxx>]

Hi Kris,

> First of all my setup looks like this
> 
> Router (A.B.C.D) - dom0(A.B.C.D+1) - domU(A.B.C.D+2)
> 
> I can ping from domU -> dom0 and visa versa.
> I can ping from dom0 -> Router.
> I can't ping from domU -> Router.

It would appear that either domU doesn't know how to reach the router,
and/or dom0 isn't forwarding IP.

Perhaps you could try the following?

The domU will need dom0 as it's gateway, so the routing table in
domU should be something like:
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
A.B.C.0         0.0.0.0         255.255.255.0   U     0      0        0 eth0
0.0.0.0         A.B.C.D+1       0.0.0.0         UG    0      0        0 eth0

Also, ensure that port forwarding is enabled in the dom0:
#echo 1 > /proc/sys/net/ipv4/ip_forward


Marcus.

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