linux-kernel - Re: sunrpc port allocation and IANA reserved list

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Date:	Wed, 11 Nov 2009 07:14:51 +0900
From:	Trond Myklebust <trond.myklebust@....uio.no>
To:	Ben Hutchings <bhutchings@...arflare.com>
Cc:	Chris Friesen <cfriesen@...tel.com>, netdev@...r.kernel.org,
	Linux kernel <linux-kernel@...r.kernel.org>
Subject: Re: sunrpc port allocation and IANA reserved list

On Tue, 2009-11-10 at 21:32 +0000, Ben Hutchings wrote:
> On Tue, 2009-11-10 at 15:06 -0600, Chris Friesen wrote:
> > On 11/10/2009 02:26 PM, Trond Myklebust wrote: 
> > > Just use /proc/sys/sunrpc/{max,min}_resvport interface to restrict the
> > > range used to a safer one. That's what it is for...
> 
> Unless I'm much mistaken, that only affects in-kernel SunRPC users.

There shouldn't be that many non-kernel sunrpc users that require
privileged ports.

The exceptions I can think of are

      * the 'mount' program, if you are using the legacy binary mount
        interface. Use text mounts instead...
      * rpc.statd might also use privileged ports when booting the
        system when it needs to notify servers of the reboot. You can
        set that port number using the '-o' option.

Others? Do any of the NIS services require it?

Trond

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