linux-kernel - Re: [patch 03/19] SUNRPC: avoid choosing an IPMI port for RPC traffic

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Message-ID: <20061012015306.GB27693@lists.us.dell.com>
Date:	Wed, 11 Oct 2006 20:53:06 -0500
From:	Matt Domsch <Matt_Domsch@...l.com>
To:	Trond Myklebust <Trond.Myklebust@...app.com>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Jan Engelhardt <jengelh@...ux01.gwdg.de>,
	Greg KH <gregkh@...e.de>, linux-kernel@...r.kernel.org,
	stable@...nel.org, Justin Forbes <jmforbes@...uxtx.org>,
	Zwane Mwaikambo <zwane@....linux.org.uk>,
	"Theodore Ts'o" <tytso@....edu>,
	Randy Dunlap <rdunlap@...otime.net>,
	Dave Jones <davej@...hat.com>,
	Chuck Wolber <chuckw@...ntumlinux.com>,
	Chris Wedgwood <reviews@...cw.f00f.org>,
	Michael Krufky <mkrufky@...uxtv.org>, torvalds@...l.org,
	akpm@...l.org, Chuck Lever <chuck.lever@...cle.com>
Subject: Re: [patch 03/19] SUNRPC: avoid choosing an IPMI port for RPC traffic

On Wed, Oct 11, 2006 at 06:35:05PM -0700, Trond Myklebust wrote:
> On Thu, 2006-10-12 at 02:12 +0100, Alan Cox wrote:
> > Ar Mer, 2006-10-11 am 19:45 -0400, ysgrifennodd Trond Myklebust:
> > > Feel free to tell the board manufacturers that they are idiots, and
> > > should not design boards that hijack specific ports without providing
> > > the O/S with any means of detecting this, but in the meantime, it _is_
> > > the case that they are doing this.
> > 
> > Then their hardware is faulty and should be specifically blacklisted not
> > make everyone have to deal with silly unmaintainable hacks.
> 
> They are not hacks. The actual range of ports used by the RPC client is
> set using /proc/sys/sunrpc/(min|max)_resvport. People that don't have
> broken motherboards can override the default range, which is all that we
> are changing here.
> 
> To be fair, the motherboard manufacturers have actually registered these
> ports with IANA:
> 
> asf-rmcp        623/tcp    ASF Remote Management and Control Protocol
> asf-rmcp        623/udp    ASF Remote Management and Control Protocol
> 
> asf-secure-rmcp 664/tcp    ASF Secure Remote Management and Control Protocol
> asf-secure-rmcp 664/udp    ASF Secure Remote Management and Control Protocol
> 
> but the problem remains that we have no way to actually detect a
> motherboard that uses those ports.

My hackish solution was to create a fake xinetd service listening on
those ports.

http://lists.us.dell.com/pipermail/linux-poweredge/2005-November/023606.html

For the one Dell server affected, we could DMI list
it; likewise for others.


-- 
Matt Domsch
Software Architect
Dell Linux Solutions linux.dell.com & www.dell.com/linux
Linux on Dell mailing lists @ http://lists.us.dell.com
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