Re: [uml-user] Re: Trouble setting up network from the command-line

[Mattia D. <mal...@li...>]

On Fri, May 05, 2006 at 11:11:51AM +0200, Stephane Bortzmeyer wrote:
> On Tue, May 02, 2006 at 08:39:54AM -0700,
>  Brock, Anthony - NET <Ant...@or...> wrote 
>  a message of 25 lines which said:
[...]
> [42949384.150000] * bash -c echo 0 > /proc/sys/net/ipv4/conf/tap0/proxy_arp
> [42949384.150000] * arp -i eth0 -d 192.134.4.79 pub
> [42949384.150000] * route add -host 192.134.4.79 dev tap0
> [42949384.150000] * bash -c echo 1 > /proc/sys/net/ipv4/conf/tap0/proxy_arp
> [42949384.150000] * arp -Ds 192.134.4.79 eth0 pub
>                                                                          [ ok ]
> Most of these (modifying the routes, playing with the ARP cache,
> enabling forwarding) require to be root and I do not think that access
> to the TAP device is enough?

Indeed, the last part of the trick is installing um-net suid root.

# ls -l /usr/lib/uml/uml_net
-rwsr-x--- 1 root uml-net 19648 2006-04-14 19:58 /usr/lib/uml/uml_net

The user needs then to be added to the group uml-net (in my case).

-- 
mattia
:wq!