Re: [Qemu-devel] user-net -redir working?

[Ben Taylor]

Richard Neill <address@hidden> wrote:
> 
> Re: User-net not working:
> 
> > Disabling the Nagle algorithm (i.e., enabling TCP_NODELAY) or typing a
> > lot of garbage just to fill the buffer with enough data can help,
> > also.
> > 
> > And IIRC, netcat has a UDP mode as well. I see no reason for this to
> > happen, but is there any chance it's using UDP by default, and you're
> > only redirecting TCP?
> > 
> > Good luck!
> 
> Thanks for your message.
> 
> I think that -redir really is broken: I've also been unsuccessful in 
> trying to make it work using an FTP server on a Windows guest, and using 
> the SSH server on a knoppix guest. Has anyone here ever had success with 
> it? It also fails on hosts with 2 different versions of Mandrake.
> 
> Anyway, I've taken your suggestion, and run both ends with ethereal. 
> Here's what I did:
> 
> 
> HOST (Linux);
>    qemu -cdrom /dev/cdrom -boot d -user-net -redir tcp:2200::22
> 
> GUEST (Knoppix):
>    Boot up, then start sshd. Verify that I can indeed do ssh
>    address@hidden, and that PermitRootLogin is yes in sshd_config.
> 
>     Then, start ethereal (on the "any" interface)
> 
> 
> HOST:
>    Start ethereal (on the "any" interface")
>    ssh -p 2200 address@hidden
> 
>   At this point, ssh just stalls. It's obviously waiting for something,
>   but not known what. I get no output at all from it.


Can you try "ssh -p 2200 root@<my IP address not localhost>

I've run into this several times dealing with the -redir
function, especially since localhost resolves as 127.0.0.1.
On my Solaris host with a linux guest, the packet arriving
showed up as 127.0.0.1, which ended up with the same
behavior as you're describing.


Ben

ethereal.guest.log
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ethereal.host.log
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