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Dodo

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    Episode 5x26

    in Hak5

    Posted

    Around 16:40 you're talking about a setting on the SIM card, which the provider can set to prevent a message being displayed on the handset in case the AC at the base station does not provide encryption (standard in India for example). How do I figure out which option is currently set on a particular SIM card (preferably without a trip to India or some African third world country), and how do I change that setting?

    I don't like it that text messages may be sent plain over the air, before being received by the handset. Or, if I'm ever evil enough, I might want to tamper with certain people's SIM cards. :)

    I've been reading those documents (and and a few others), but none of them explicitly say in detail which data array I'd need to read or modify to achieve the desired result (view/change the encryption warning setting).

    Addendum:

    http://www.crypto.rub.de/imperia/md/conten...rd_security.pdf

    http://www.hackcanada.com/blackcrawl/cell/.../gsm-secur.html

    Episode 5x19

    in Hak5

    Posted

    Yay, I won something.

    Software RAID ain't so bad, sure you'll lose some CPU performance, but regarding that RESTful services don't utilize the CPU much, and the RAID load only affects a single CPU core, that's actually negligible and the more 'green' thing to do in the $2000 price range. Also, storage expandability and cost effectiveness were the most important parts. The 3ware 9650SE-24M8 ain't so cheap (~ $1000). Port multiplier cables are cheaper. :)

    The server hosting Hak5.org and the Hak5 forums was hacked.

    in Everything Else

    Posted

    On July 20th, 2009 the server hosting Hak5.org and the Hak5 forums was hacked into and defaced via an exploit on a unrelated system. During this time the forum database was accessed and as such, passwords (which are linked to your email address) used for forum accounts have been compromised. Please login to http://www.hak5.org/forums/ and change your password, if you used this password elsewhere you will need to change these passwords ASAP. We apologize for this inconvenience.

    That shouldn't be a problem. You shouldn't store passwords in plain text. The database shouldn't be hacked, and if that happens, you shouldn't even know about it. This is forum software, thus any damn page request, malicious or not, will inflict a database query.

    Also, the attacker usually won't want a user account or their passwords, but rather the email addresses to sell them to spam forwarders. Sorry if this sounds rude now, but this site and its forums are simply to invaluable or irrelevant to attack for other reasons.

    I'm not changing my password. May someone play havoc with this user account on THESE forums, and THESE forums only... Like as if I'm using the same password and username everywhere... come on, get real... like I would risk anything important, I want to keep to some random forums that don't rely on keeping my credentials safe... seriously... <_<

    Episode 5x19

    in Hak5

    Posted

    I need crazy amounts of storage, so the most effort with this one would go into the case, the RAID and the hard drives. If I would want to run a webserver on it, a slow CPU does fine, since it's not on high amounts of traffic.

    Per unit:

    1x RC0424 4U 24 DRIVE Rackmount Chassis (~ $600) (damn expensive, but the cheapest 24 SATA drive unit I found, includes threeway redundant PSU, though)

    1x GigaByte GA-EX58-UD3R (~ $190) (seems to be the cheapest one)

    1x MSI NX8400GS-TD256EH (~ $30)

    1x Intel Xeon E5502 (~ $195) (should work)

    1x 12GB (6x2048MB) T/C Kit PN - OCZ3G1333LV12GS (~ $175) (DDR3-800 without ECC seems to be more expensive than DDR3-1333)

    That totals up to ~ $1190 so far.

    NNx Samsung EcoGreen F2 H103SI (~ $70 per drive, you could get up to 11 for the rest, they're even on par with WD Raptors performance wise >120MB/s sequential read)

    With 8 ports for 8 drives, there's $250 left for replacing fans and coolers to something silent and efficient. Have a look at this.

    I would implement RAID in software as the performance hit on a storage solution, even if it provides basic web or network media publishing services, doesn't impact the system performance very much and won't be noticable on 1000MBit BaseT full-duplex network connections anyway. The mainboard has 8 SATA2 ports with hot-plug support (must be enabled in the BIOS in most cases) for more ports (and drives) additional costs may arise that may exceed the 2000USD limit. Hot swap bay cases are mostly in the same price range, even though they're smaller (2U or 3U) and conceil less drive bays. Using this case enables easy and convenient expandability. Using RAID implemented in software enables easy expansion and does not limit RAID functions to the controller functions (most don't support expanding RAID 0 arrays with additional drives and can't recover from a crash during such a migration either. The OS goes onto the storage array, as nice as separation is, for replacement, if the single separate OS device fails, your system is down, no matter the RAID, thus it's a bad practice. OS will be installed via PXE boot or a USB pen drive, you always have one lying around.

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