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Re: Supermicro server motherboards with hardware backdoor?

From DecadentLinuxUserNumeroUno@decadence.org
Newsgroups sci.electronics.design
Subject Re: Supermicro server motherboards with hardware backdoor?
Date 2018-10-09 07:03 +0000
Organization Aioe.org NNTP Server
Message-ID <pphjrs$1pti$1@gioia.aioe.org> (permalink)
References (5 earlier) <pp8pg7$1ndi$1@gioia.aioe.org> <ApmdnWGlI5J2niTGnZ2dnUU7-V2dnZ2d@supernews.com> <f6509bcd-8e29-4671-b3f3-a0ceeda939d9@googlegroups.com> <o6ednaRuUaleBybGnZ2dnUU7-LGdnZ2d@supernews.com> <464738e6-e97d-4b3b-b043-a560d83a61cf@googlegroups.com>

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gnuarm.deletethisbit@gmail.com wrote in
news:464738e6-e97d-4b3b-b043-a560d83a61cf@googlegroups.com: 

> On Monday, October 8, 2018 at 1:58:35 PM UTC-4, Phil Hobbs wrote:
>> On 10/6/18 10:43 PM, gnuarm.deletethisbit@gmail.com wrote:
>> > On Saturday, October 6, 2018 at 2:50:27 PM UTC-4, Phil Hobbs wrote:
>> >>
>> >> Embedded passives have been around for ages, so that's probably
>> >> quite feasible.
>> > 
>> > I think they've been around because they are fundamentally
>> > different fr 
> om adding chips.  In the late 70s or early 80s an array processor I
> worked on used a 16 or 18 layer board with an "omega" layer for
> termination resistors in ECL.  That was basically painted on the
> fiberglass between layers.  I expect capacitors would not have been so
> easy since they require much more height.  Do they add capacitors
> between layers now? 
>> > 
>> > Not saying it can't be done, just asking if it commonly available.
>> > 
>> > Rick C.
>> > 
>> 
>> Embedded passives are normal SMT components iirc.  Dunno how they're 
>> attached.
> 
> As I tried to explain resistors can be printed onto a board layer with
> virtually no thickness.  Capacitors more than a very few pF can not be
> added this way.  Inductors are even harder to add if they are more
> than a very few uH which can be done via traces on the PCB.  So I'm
> not sure why you think normal SMT devices can be added within the
> layers of a PCB... at least without creating visible bumps.  Are you
> suggesting they make holes in some of the layers to accommodate the
> thickness of the SMT parts?  Since you say you don't know how they are
> attached, I guess you can't answer any of this.  
> 
> So what makes you think this is possible? 
> 
> Rick C.
> 

We had HVPS designs where we had internal layers milled to create 
pockets and the PCB house had no problem with it.

  Still, this hack was not that and such a change would get caught 
almost immediately.  PCBs get tested on continuity machines.

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Supermicro server motherboards with hardware backdoor? Clifford Heath <no.spam@please.net> - 2018-10-05 09:29 +1000
  Re: Supermicro server motherboards with hardware backdoor? Chris <xxx.syseng.yyy@gfsys.co.uk> - 2018-10-05 01:14 +0100
  Re: Supermicro server motherboards with hardware backdoor? gnuarm.deletethisbit@gmail.com - 2018-10-04 19:31 -0700
  Re: Supermicro server motherboards with hardware backdoor? Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2018-10-05 07:27 +0000
    Re: Supermicro server motherboards with hardware backdoor? Gene Filatov <evgeny.filatov@ieee.org> - 2018-10-05 11:12 +0300
      Re: Supermicro server motherboards with hardware backdoor? Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2018-10-05 08:41 +0000
  Re: Supermicro server motherboards with hardware backdoor? Theo Markettos <theom+news@chiark.greenend.org.uk> - 2018-10-05 16:28 +0100
    Re: Supermicro server motherboards with hardware backdoor? Rob Gaddi <rgaddi@highlandtechnology.invalid> - 2018-10-05 09:34 -0700
      Re: Supermicro server motherboards with hardware backdoor? Theo <theom+news@chiark.greenend.org.uk> - 2018-10-05 20:59 +0100
        Re: Supermicro server motherboards with hardware backdoor? gnuarm.deletethisbit@gmail.com - 2018-10-05 14:19 -0700
          Re: Supermicro server motherboards with hardware backdoor? Chris <xxx.syseng.yyy@gfsys.co.uk> - 2018-10-05 23:44 +0100
            Re: Supermicro server motherboards with hardware backdoor? Clifford Heath <no.spam@please.net> - 2018-10-06 09:58 +1000
              Re: Supermicro server motherboards with hardware backdoor? Steve Wilson <no@spam.com> - 2018-10-06 00:39 +0000
                Re: Supermicro server motherboards with hardware backdoor? Clifford Heath <no.spam@please.net> - 2018-10-06 12:50 +1000
                Re: Supermicro server motherboards with hardware backdoor? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-06 08:42 +0000
                Re: Supermicro server motherboards with hardware backdoor? Clifford Heath <no.spam@please.net> - 2018-10-06 21:41 +1000
                Re: Supermicro server motherboards with hardware backdoor? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-06 14:59 +0000
                Re: Supermicro server motherboards with hardware backdoor? Jeff Liebermann <jeffl@cruzio.com> - 2018-10-06 09:10 -0700
                Re: Supermicro server motherboards with hardware backdoor? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-06 16:44 +0000
                Re: Supermicro server motherboards with hardware backdoor? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-06 16:46 +0000
                Re: Supermicro server motherboards with hardware backdoor? gnuarm.deletethisbit@gmail.com - 2018-10-06 19:34 -0700
                Re: Supermicro server motherboards with hardware backdoor? Rob <nomail@example.com> - 2018-10-06 13:46 +0000
                Re: Supermicro server motherboards with hardware backdoor? gnuarm.deletethisbit@gmail.com - 2018-10-06 05:12 -0700
              Re: Supermicro server motherboards with hardware backdoor? gnuarm.deletethisbit@gmail.com - 2018-10-06 04:36 -0700
            Re: Supermicro server motherboards with hardware backdoor? Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2018-10-06 14:50 -0400
              Re: Supermicro server motherboards with hardware backdoor? gnuarm.deletethisbit@gmail.com - 2018-10-06 19:43 -0700
                Re: Supermicro server motherboards with hardware backdoor? Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2018-10-08 13:58 -0400
                Re: Supermicro server motherboards with hardware backdoor? gnuarm.deletethisbit@gmail.com - 2018-10-08 20:04 -0700
                Re: Supermicro server motherboards with hardware backdoor? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-09 07:03 +0000
                Re: Supermicro server motherboards with hardware backdoor? Chris <xxx.syseng.yyy@gfsys.co.uk> - 2018-10-09 12:13 +0100
                Re: Supermicro server motherboards with hardware backdoor? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-09 22:52 +0000
                Re: Supermicro server motherboards with hardware backdoor? Clifford Heath <no.spam@please.net> - 2018-10-10 10:06 +1100
                Re: Supermicro server motherboards with hardware backdoor? gnuarm.deletethisbit@gmail.com - 2018-10-10 19:06 -0700
                Re: Supermicro server motherboards with hardware backdoor? gnuarm.deletethisbit@gmail.com - 2018-10-10 18:43 -0700
                Re: Supermicro server motherboards with hardware backdoor? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-11 12:16 +0000
                Re: Supermicro server motherboards with hardware backdoor? Gerhard Hoffmann <ghf@hoffmann-hochfrequenz.de> - 2018-10-11 14:50 +0200
                Re: Supermicro server motherboards with hardware backdoor? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-11 13:51 +0000
                Re: Supermicro server motherboards with hardware backdoor? gnuarm.deletethisbit@gmail.com - 2018-10-11 08:35 -0700
                Re: Supermicro server motherboards with hardware backdoor? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-11 15:56 +0000
                Re: Supermicro server motherboards with hardware backdoor? gnuarm.deletethisbit@gmail.com - 2018-10-11 13:24 -0700
                Re: Supermicro server motherboards with hardware backdoor? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-11 21:24 +0000
                Re: Supermicro server motherboards with hardware backdoor? gnuarm.deletethisbit@gmail.com - 2018-10-11 20:43 -0700
                Re: Supermicro server motherboards with hardware backdoor? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-12 07:38 +0000
                Re: Supermicro server motherboards with hardware backdoor? gnuarm.deletethisbit@gmail.com - 2018-10-12 08:55 -0700
                Re: Supermicro server motherboards with hardware backdoor? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-12 16:48 +0000
                Re: Supermicro server motherboards with hardware backdoor? gnuarm.deletethisbit@gmail.com - 2018-10-12 10:22 -0700
                Re: Supermicro server motherboards with hardware backdoor? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-12 16:49 +0000
                Re: Supermicro server motherboards with hardware backdoor? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-12 16:53 +0000
                Re: Supermicro server motherboards with hardware backdoor? gnuarm.deletethisbit@gmail.com - 2018-10-12 10:27 -0700
                Re: Supermicro server motherboards with hardware backdoor? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-12 23:46 +0000
                Re: Supermicro server motherboards with hardware backdoor? gnuarm.deletethisbit@gmail.com - 2018-10-12 17:10 -0700
                Re: Supermicro server motherboards with hardware backdoor? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-13 02:13 +0000
                Re: Supermicro server motherboards with hardware backdoor? gnuarm.deletethisbit@gmail.com - 2018-10-12 22:29 -0700
                Re: Supermicro server motherboards with hardware backdoor? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-13 09:14 +0000
                Re: Supermicro server motherboards with hardware backdoor? +++ATH0 <news@ringpiece.local> - 2018-10-13 14:29 -0700
                Re: Supermicro server motherboards with hardware backdoor? Chris <xxx.syseng.yyy@gfsys.co.uk> - 2018-10-15 16:27 +0100
                Re: Supermicro server motherboards with hardware backdoor? gnuarm.deletethisbit@gmail.com - 2018-10-11 08:28 -0700
                Re: Supermicro server motherboards with hardware backdoor? gnuarm.deletethisbit@gmail.com - 2018-10-11 08:27 -0700
              Re: Supermicro server motherboards with hardware backdoor? Clifford Heath <no.spam@please.net> - 2018-10-10 10:04 +1100
                Re: Supermicro server motherboards with hardware backdoor? pcdhobbs@gmail.com - 2018-10-10 06:47 -0700
                Re: Supermicro server motherboards with hardware backdoor? gnuarm.deletethisbit@gmail.com - 2018-10-10 19:01 -0700
          Re: Supermicro server motherboards with hardware backdoor? <698839253X6D445TD@nospam.org> - 2018-10-06 06:03 +0000
            Re: Supermicro server motherboards with hardware backdoor? gnuarm.deletethisbit@gmail.com - 2018-10-06 05:17 -0700
              Re: Supermicro server motherboards with hardware backdoor? <698839253X6D445TD@nospam.org> - 2018-10-06 15:38 +0000
                Re: Supermicro server motherboards with hardware backdoor? gnuarm.deletethisbit@gmail.com - 2018-10-06 19:14 -0700
                Re: Supermicro server motherboards with hardware backdoor? <698839253X6D445TD@nospam.org> - 2018-10-07 07:15 +0000
                Re: Supermicro server motherboards with hardware backdoor? gnuarm.deletethisbit@gmail.com - 2018-10-07 08:13 -0700
          Re: Supermicro server motherboards with hardware backdoor? <698839253X6D445TD@nospam.org> - 2018-10-20 07:07 +0000
    Re: Supermicro server motherboards with hardware backdoor? Jeff Liebermann <jeffl@cruzio.com> - 2018-10-05 20:12 -0700
      Re: Supermicro server motherboards with hardware backdoor? Clifford Heath <no.spam@please.net> - 2018-10-06 13:42 +1000
        Re: Supermicro server motherboards with hardware backdoor? Jeff Liebermann <jeffl@cruzio.com> - 2018-10-05 21:02 -0700
        Re: Supermicro server motherboards with hardware backdoor? <698839253X6D445TD@nospam.org> - 2018-10-06 06:03 +0000
      Re: Supermicro server motherboards with hardware backdoor? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-06 08:45 +0000
        Re: Supermicro server motherboards with hardware backdoor? Jeff Liebermann <jeffl@cruzio.com> - 2018-10-06 08:51 -0700
          Re: Supermicro server motherboards with hardware backdoor? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-06 16:42 +0000
            Re: Supermicro server motherboards with hardware backdoor? Dimiter_Popoff <dp@tgi-sci.com> - 2018-10-06 19:55 +0300
              Re: Supermicro server motherboards with hardware backdoor? Chris <xxx.syseng.yyy@gfsys.co.uk> - 2018-10-06 19:29 +0100
                Re: Supermicro server motherboards with hardware backdoor? DLUNU <DecadentLinuxUserNumeroUno@DLU.org> - 2018-10-06 22:41 +0000
                Re: Supermicro server motherboards with hardware backdoor? Dimiter_Popoff <dp@tgi-sci.com> - 2018-10-07 02:07 +0300
                Re: Supermicro server motherboards with hardware backdoor? Clifford Heath <no.spam@please.net> - 2018-10-07 11:56 +1100
                Re: Supermicro server motherboards with hardware backdoor? gnuarm.deletethisbit@gmail.com - 2018-10-06 20:06 -0700
                Re: Supermicro server motherboards with hardware backdoor? Johnny B Good <johnny-b-good@invalid.ntlworld.com> - 2018-10-07 03:46 +0000
                Re: Supermicro server motherboards with hardware backdoor? gnuarm.deletethisbit@gmail.com - 2018-10-06 22:04 -0700
              Re: Supermicro server motherboards with hardware backdoor? DLUNU <DecadentLinuxUserNumeroUno@DLU.org> - 2018-10-06 22:40 +0000
                Re: Supermicro server motherboards with hardware backdoor? Dimiter_Popoff <dp@tgi-sci.com> - 2018-10-07 02:05 +0300
                Re: Supermicro server motherboards with hardware backdoor? Chris <xxx.syseng.yyy@gfsys.co.uk> - 2018-10-07 01:36 +0100
            Re: Supermicro server motherboards with hardware backdoor? Jeff Liebermann <jeffl@cruzio.com> - 2018-10-06 20:14 -0700
              Re: Supermicro server motherboards with hardware backdoor? Tom Gardner <spamjunk@blueyonder.co.uk> - 2018-10-07 08:07 +0100
              Re: Supermicro server motherboards with hardware backdoor? DLUNU <DecadentLinuxUserNumeroUno@DLU.org> - 2018-10-07 14:09 +0000
                Re: Supermicro server motherboards with hardware backdoor? Jeff Liebermann <jeffl@cruzio.com> - 2018-10-07 08:55 -0700
                Re: Supermicro server motherboards with hardware backdoor? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-08 00:50 +0000
                Re: Supermicro server motherboards with hardware backdoor? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-08 00:51 +0000
          Re: Supermicro server motherboards with hardware backdoor? gnuarm.deletethisbit@gmail.com - 2018-10-06 19:23 -0700
            Re: Supermicro server motherboards with hardware backdoor? DLUNU <DecadentLinuxUserNumeroUno@DLU.org> - 2018-10-07 13:52 +0000
              Re: Supermicro server motherboards with hardware backdoor? gnuarm.deletethisbit@gmail.com - 2018-10-07 08:18 -0700
                Re: Supermicro server motherboards with hardware backdoor? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-08 00:52 +0000
                Re: Supermicro server motherboards with hardware backdoor? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-08 00:54 +0000
                Re: Supermicro server motherboards with hardware backdoor? gnuarm.deletethisbit@gmail.com - 2018-10-07 22:20 -0700
                Re: Supermicro server motherboards with hardware backdoor? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-08 08:20 +0000
                Re: Supermicro server motherboards with hardware backdoor? Cows are Nice <nice@cows.moo> - 2018-10-08 08:19 -0700
                Re: Supermicro server motherboards with hardware backdoor? Jeff Liebermann <jeffl@cruzio.com> - 2018-10-08 10:30 -0700
                Re: Supermicro server motherboards with hardware backdoor? gnuarm.deletethisbit@gmail.com - 2018-10-08 19:57 -0700
                Re: Supermicro server motherboards with hardware backdoor? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-09 06:51 +0000
      Re: Supermicro server motherboards with hardware backdoor? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-06 08:50 +0000
  Re: Supermicro server motherboards with hardware backdoor? jurb6006@gmail.com - 2018-10-11 07:14 -0700
  Re: Supermicro server motherboards with hardware backdoor? Philipp Klaus Krause <pkk@spth.de> - 2018-10-12 08:21 +0200

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