Posts by Woodgie


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1) Message boards : Number crunching : Macs Vulnerable To Virus - not Removable (Message 1633519)
Posted 3 days ago by Profile WoodgieProject donor
Here's a little update:

http://www.macrumors.com/2015/01/26/os-x-10-10-2-thunderstrike-exploit-fix/
2) Message boards : Number crunching : Macs Vulnerable To Virus - not Removable (Message 1627191)
Posted 16 days ago by Profile WoodgieProject donor
The real danger here hasn't been posted yet. Joe Gambling Debt works at the Thunderbolt device maker. He takes the cash to change the ROM image that is placed in every device off his production line. As long as the Nation State behind this has done their job there aren't going to be any crashes from bad code. Now they have unfettered access to your security keys, and you haven't a clue. That is the real danger in this hack, or the same for the USB interface hack. Do you trust the maker of the device you are about to plug in from the factory sealed box?


That is true but again, while it IS possible I think it unlikely. Especially if the manufacturer has half decent QC in place.

That's not to say it can't happen, you could have a company whose sole purpose is to produce rooted devices. An extreme example of this is all the fake Cisco kit which hit the market a few years ago, imagine the implications THAT has!
3) Message boards : Number crunching : Macs Vulnerable To Virus - not Removable (Message 1627132)
Posted 16 days ago by Profile WoodgieProject donor
Saw this on one of my favorite sites this morning. The Guru of 3D site is highly reliable and I would suggest that all mac users take note.

http://www.guru3d.com/news-story/macs-vulnerable-to-virus-is-not-removable.html


As with all things Cyber Security related I think this needs to be understood in context.

Absolutely this is a potential horror story, I don't deny it and I am not trying to come across as an Apple apologist (though full disclosure, my everyday job is IT Manager of a large Mac network) but in mitigation, the original attack needed unfettered access to the machine and enough time to disassemble it to access chips directly on the logic board.

Fair enough, the subsequent attack can use a modified Thunderbolt device. This is indeed easier to use but not necessarily to implement as it would involve an understanding of how to access the PCIe bus and write firmware to the ROMs at a very low level. Get that part wrong and you're at best not going to get the results you want and at worst the machine will fail to boot causing the user to either have the logic board replaced or get a new computer. Annoying for them to be sure but a complete failure to launch for the potential villain.

Yes, there will now no doubt come a time when Thunderbolt RootKits are available to Joe Skriptkiddie but by then the hole will largely have been patched and some new vulnerability will be the latest-greatest thing.

Security is all about risk mitigation. While I agree the attack is not good I think there are things like Heartbleed and Poodle which are far more likely to cause problems in your everyday lives.

Also, please don't think I'm dismissing Cyber Security entirely! I certainly am not. I'm just saying I have far more luck with Social Engineering than I ever do with 'hacking'.

[edit for spelling x2]
4) Message boards : Number crunching : Dell PowerEdge 1950 (Message 1626722)
Posted 18 days ago by Profile WoodgieProject donor
Those last 2 posts have a couple of lovely pieces of advice.

I realise the downsides to doing something like that, mainly the loss of processing power/speed due to bus constraints, but something is better than nothing and they give me a way to do something nice and cheaply (which face it, is the point here!)
5) Message boards : Number crunching : Dell PowerEdge 1950 (Message 1625700)
Posted 21 days ago by Profile WoodgieProject donor
Yes, I know where that image came from. I also know what you said in your above post, http://setiathome.berkeley.edu/forum_thread.php?id=76467&postid=1625305
Now you know what he did. His post does say what he did, "..but by testing several mobo's, graphic cards etc.."
He just failed to mention what type of mobo's he was testing...


I get it, sorry. I was trying to prevent confusion for anyone else who might come along and read the thread.

Another thing I've been toying with is maybe getting an external PCIe expansion box but now we're suddenly going from a couple of free servers and couple of hundred pounds for some extra processing power to a couple of thousands of pounds for a PCIe expansion bay (unless someone has one to donate to me :) ) and then more still for the graphics cards...
6) Message boards : Number crunching : Dell PowerEdge 1950 (Message 1625693)
Posted 21 days ago by Profile WoodgieProject donor
Someone in the 750ti thread pointed out this version but it remains to be seen if:
(a) there's enough room for the heatsink & fan
and
(b) it's a full length PCIe x16 slot.

Some mighty 'ifs'. I don't think I'm going to be so lucky.

I was looking at the image;



...and to me it looks as though that is a desktop board in a 2U server case. Now, I haven't seen very many server interiors, but, that's what it looks like to me. If that's the case, all you need is a smallish board with 4 PCIe slots and the correct 2U case.

The thread is still there;
PCI-e 16x card no fit in PCI-e 1x
But it looks as though the best image is missing. The OP in that thread used a soldering iron, my boards laughed at my iron. The dremel stopped the laughing.


That's not my server, that's DanHansen@Denmark's rig from his thread which I referenced earlier.
7) Message boards : Number crunching : Dell PowerEdge 1950 (Message 1625526)
Posted 21 days ago by Profile WoodgieProject donor
The link they gave you says quite clearly that it's a 16 slot card.


Sorry, I meant if the server has a x16 or an x8 (more likely) riser, I understand the card is a x16 hence it being a big if.
8) Message boards : Number crunching : Dell PowerEdge 1950 (Message 1625512)
Posted 21 days ago by Profile WoodgieProject donor
Someone in the 750ti thread pointed out this version but it remains to be seen if:
(a) there's enough room for the heatsink & fan
and
(b) it's a full length PCIe x16 slot.

Some mighty 'ifs'. I don't think I'm going to be so lucky.
9) Message boards : Number crunching : The GTX750(Ti) Thread (Message 1625509)
Posted 21 days ago by Profile WoodgieProject donor
I've a question for you 750ti users.

I know they're small and importantly they're bus powered. Do you think I could stuff one (or a couple) in a Dell PowerEdge 1950?


One (or a couple) of these might fit. I just put one into an OptiPlex 745 small form factor and it fits and runs fine.

http://www.newegg.com/Product/Product.aspx?Item=N82E16814127836


Well hello! That looks as if it'll do the job spiffingly! I'll have to double check the thickness of the heatsink & fan but that could be a winner. AND they sell it through the UK store.

Assuming, as was mentioned in the other thread, that it's a x16 slot...
10) Message boards : Number crunching : How To Do A "Headless Linux CLI Multiple GPU Boinc Server" Semi-Pro Cruncher ;) (Message 1625333)
Posted 22 days ago by Profile WoodgieProject donor
Today or tomorrow I should be being sent 3 x Dell PowerEdge 1950 1U servers and I was hoping to set them up running Linux.

I have a thread going on over here discussing what kind of graphics cards I could fit in them (it looks as if it has to be a one slot thick card and probably with the shorter PCIe x8 connector, we'll see).

Any thoughts on the matter? Also, as I said in a PM my offer of hosting your instructions (with full accreditation to you and the people who actually DID the work) on my website still stands.
11) Message boards : Number crunching : Dell PowerEdge 1950 (Message 1625305)
Posted 22 days ago by Profile WoodgieProject donor
OK for physics for getting a screaming GPU in there...

Have you any preference or experience for what Linux distro you want to try?


Good luck,

And happy fast crunch in!
Martin


I think THAT discussion is enough for a thread all of its own! I was hoping to find out more about what this guy did as my main aim.

I have to say all this discussion is brilliant and I appreciate every word of it. You brought up something that hadn't crossed my mind and that's the physical PCI slot it'd be, that limits my options further. DAMN I'm hoping they're long slots but they're going to be short, aren't they.

I'll keep you all updated and probably post something over on my blog when I get them.
12) Message boards : Number crunching : Dell PowerEdge 1950 (Message 1625122)
Posted 22 days ago by Profile WoodgieProject donor
Yep, it really doesn't look as if there's room for much more than a simple fibre card or NIC.

Anyone know of a card that might work?
13) Message boards : Number crunching : Dell PowerEdge 1950 (Message 1624995)
Posted 22 days ago by Profile WoodgieProject donor
Well Generally, if it is made to fit in 2 slots - it will fit.

Just look at the computer and see if there is anything that would be in the way if you put 2 cards in it.

The 1950 is a 1U rack server (1 5/8 inches high): the PCIe expansion cards would be lying flat, or two separate buses. I suspect the thickness of typical 750Ti would be the limiting value.

Also, I've heard one of these servers powered up while lying flat on a desk: the cooling fans are LOUD, even when they haven't got the extra heat from two GPUs to dispose of. I hope you've got a brick outhouse to run them in.


I have a server room in which to run them with proper cooling etc. so that isn't going to be much of a problem.

I see what people are saying about thickness. That was my worry, the thickness of the heatsink/fan. I don't have them yet but a tape measure will be the first thing I put in them.

Thanks everyone.
14) Message boards : Number crunching : The GTX750(Ti) Thread (Message 1624960)
Posted 22 days ago by Profile WoodgieProject donor
I've a question for you 750ti users.

I know they're small and importantly they're bus powered. Do you think I could stuff one (or a couple) in a Dell PowerEdge 1950?
15) Message boards : Number crunching : Dell PowerEdge 1950 (Message 1624951)
Posted 22 days ago by Profile WoodgieProject donor
Of course I'm willing to accept suggestions for ANY graphics cards which would do the job and are reasonably priced.

And maybe some which aren't...
16) Message boards : Number crunching : Dell PowerEdge 1950 (Message 1624950)
Posted 22 days ago by Profile WoodgieProject donor
I'm about to come into a couple of Dell PowerEdge 1950 servers which I'm going to throw a flavour of Linux on and hope for the best...

I know they're old but the specs say there are 2 x PCIe slots so I was thinking of getting an nVidia 750ti (or 2) for each of them to give them an added bit of kick.

I'm worried about the size of fans and heatsinks. Does anyone have any experience with the PowerEdge series, would one of these fit? They look small enough. Or would I be better off with one of these?
17) Message boards : Number crunching : Another 'Sorry' thread (should we sticky one?) (Message 1623481)
Posted 25 days ago by Profile WoodgieProject donor
It automagically merged the host and abandoned the taks. All good now.


Thanks again.


This is what appears to have happened with Hermes. I was a bit confused when HAL9000 pointed out they'd been abandoned as I hadn't abandoned them, just deleted them from the machine.

So they'll be re-assigned in a timely fashion, good. All's well that ends well then?
18) Message boards : Number crunching : Another 'Sorry' thread (should we sticky one?) (Message 1622803)
Posted 26 days ago by Profile WoodgieProject donor
An apology to anyone relying on Hermes (6376517) to validate workunits but last night I did a dumb thing and updated BOINC.

Hermes is a an old Mac OS X 10.6.8 Mac Mini (CoreDuo) and really didn't like BOINC 7.4.36 (couldn't start the daemon etc.) So I RTFM and rolled back to 7.2.42. The problem is, in rolling back I went and deleted the workunits it was crunching.

Live and learn, huh? (also, 'stop and think' would have helped...) Sorry about that.
19) Message boards : Number crunching : How To Do A "Headless Linux CLI Multiple GPU Boinc Server" Semi-Pro Cruncher ;) (Message 1615793)
Posted 18 Dec 2014 by Profile WoodgieProject donor
Don't leave us hanging buddy!
20) Message boards : Number crunching : SETI/BOINC Milestones [ v2.0 ] - XXVIII (Message 1614781)
Posted 16 Dec 2014 by Profile WoodgieProject donor
AND I had my first host break the 10,000,000 mark yesterday.

outlander

Addictive, isn't it?


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