Re: [RFC] Allowing non-root to get iptables info?

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On Wed, Feb 27, 2008 at 12:52:52PM +0100, Patrick McHardy wrote:
> Stephen Hemminger wrote:
> >Is there any strong reason why checking the status of iptables is 
> >restricted?
> >
> >Vyatta makes a distribution for routers. In our case, we use a non-root 
> >account
> >for operator commands, and some of the commands are about querying 
> >iptables status.
> >It seems to be less risky to just fix the kernel to allow non-root user to 
> >query rules
> >than the current script that uses sudo. Another alternative would be 
> >building a special
> >restricted command that could be setuid root, but just changing the kernel 
> >seems easiest.
> I always thought of it as a privacy thing, similar to restricting
> /proc/net/nf_conntrack. But since iptables rules usually don't
> allow you to determine active connections just from the packet
> counters that might be overkill. So I don't see any real harm
> in allowing users to list the ruleset.

At least for iptables, reading of iptables status can be done by making
iptables-save setuid-root. So I think no kernel patching is necessary.

 -- Michal Miroslaw
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