I tried compiling a 2.6.20 plain vanilla kernel for my host machine, and 
running the command suggested by R. L. Nevot

iptables -t nat -A POSTROUTING -s 192.168.0.0/24 -d 0.0.0.0/0 \
-j MASQUERADE

This let me get out of my host machine.  Who knows, maybe I forgot to 
remove the iptables --policy FORWARD DROP from the firewall, or 
something stupid like that.  I will have to check with the gentoo kernel 
again to see at some point.  Thanks for all your help, it was greatly 
appreciated.


Jeff Dike wrote:
> On Fri, Apr 13, 2007 at 03:32:42PM -0700, Joel Kreager wrote:
>> I tried running
>> iptables --flush
>> iptables -t nat --flush
>>
>> early on.  iptables -L and iptables -t nat -n -L show no rules.  As far 
>> as I know, I have no other sort of firewall on my linux box.
> 
> OK, I guess that rules out a firewall as the problem.
> 
> Have you tried just letting the uml_net helper set up the host,
> instead of configuring the tap device, forwarding, arp, etc by hand?
> 
> You do this with eth0=tuntap,,,1.2.3.4
> 
>                               Jeff
> 


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