Re: [PATCH] xen-2.0: privileged port connections

[Anthony Liguori <aliguori@us.ibm.com>]

Kurt Garloff wrote:

>Hi Anthony,
>
>On Wed, Mar 23, 2005 at 09:41:24AM -0600, Anthony Liguori wrote:
>  
>
>>So, here's my concerns:
>>
>>1) ports < 1024 are reserved although 732 is currently unassigned
>>    
>>
>
>Note that NFS uses such ports without asking prior permission.
>I chose 732 because it's unassigned indeed.
>
I know.  That's one of the reasons using this port worries me.  There 
may be nfs related conflicts.

>>4) you still have to find a way to deal with the consoles
>>    
>>
>
>Before I start working on getting the consoles under control, I 
>wanted to see whether this approach is acceptable at all.
>  
>
How would you extend this to consoles?  Each console can't have it's own 
privileged port :-)

>>5) you still have to deal with xfrd
>>    
>>
>
>It seems to listen on *:8002 ... 
>Is there no authentication either? Sigh.
>  
>
Nope.  I think there are a few options.  We could use hosts.allow or 
something similiar, we could restrict it to subnets, or we could try and 
implement some sort of authentication mechanism.

Perhaps shutting it off by default and making it clear that it is 
insecure is enough.

>And we probably need to look into the event channel (8001) as well.
>  
>
Yeah.

>But for Xen-2, let's try to find a pragmatic way that enables desktop
>users to install and test xen without raising too many security 
>concerns.
>  
>
I full-heartedly agree.  I'll gladly help out on this effort.

Regards,
Anthony Liguori

>Regards,
>  
>



-------------------------------------------------------
This SF.net email is sponsored by Microsoft Mobile & Embedded DevCon 2005
Attend MEDC 2005 May 9-12 in Vegas. Learn more about the latest Windows
Embedded(r) & Windows Mobile(tm) platforms, applications & content.  Register
by 3/29 & save $300 http://ads.osdn.com/?ad_id=6883&alloc_id=15149&op=click