In <[🔎] i7jp57$jro$2@dough.gmane.org>, T o n g wrote:
>How do I use the '-net user' kvm command-line option?
"-net" command-line options must be provided in pairs to be effective. The
first one must be a "-net nic" to give the internal view of the device (i.e.
how the guest sees it). The second one should be a "-net user/tap/socket" to
give the external view of the device (i.e. how the host handles it).
(Yes, this isn't entirely clear from the documentation. I know because I live
with a qemu hacker.)
>According to
>https://help.ubuntu.com/community/KVM/Networking
>
>,-----
>| By default, if you enable the usermode networking using the '-net
>| user' command-line option, the guest OS will get an IP address in
>| the 10.0.2.0/24 address space and the host OS will be reachable
>| at 10.0.2.2.
>`-----
% man qemu | grep -B 2 -A 1 'default configuration'
-net none
Indicate that no network devices should be configured. It is used
to override the default configuration (-net nic -net user) which is
activated if no -net options are provided.
(The default configuration is not *just* "-net user".)
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