Category Archives: Hardware

DxDiag

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System Information
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Time of this report: 6/17/2014, 21:32:10
Machine name: GODBOX
Operating System: Windows 8.1 Pro 64-bit (6.3, Build 9600) (9600.winblue_gdr.140330-1035)
Language: English (Regional Setting: English)
System Manufacturer: System manufacturer
System Model: System Product Name
BIOS: BIOS Date: 09/10/13 20:36:16 Ver: 21.05
Processor: Intel(R) Core(TM) i5-3570K CPU @ 3.40GHz (4 CPUs), ~3.4GHz
Memory: 16384MB RAM
Available OS Memory: 16332MB RAM
Page File: 5280MB used, 13482MB available
Windows Dir: C:\WINDOWS
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.03.9600.16384 64bit Unicode

NTP Spoof Attacks

Apparently 2 out of 3 of our GPS clocks were being used in a spoof/DDOS attack.

The basic premise is that time requests are sent to the service with a spoofed IP for the response. Add in 100/1000/10000 clocks send results to a server/service that did not request them results in a denial of service attack.

Both clocks have been removed from the pool, scheduled for February 6th. Hickory.kulish.com has port 123 UDP closed at this time. The maintainer of Dickory.kulish.com has been notified.

Partitioning in Windows 7

Needed to remove junk from a USB thumb drive. Google search yielded a nice find at http://www.bleepingcomputer.com/forums/t/219693/unable-to-format-usb-stick-to-full-capacity/

1) Type “DISKPART” from the Command Prompt (accessible by clicking on Start and then typing “cmd” into the open field); you will then see the following prompt: DISKPART>

2) Type “LIST DISK” to see what number your USB drive is listed as.

3) Type “SELECT DISK 2″ (if your USB is disk 2; replace # with your disk #); Diskpart will confirm that “Disk 2 is now the select disk.”

Debian Jumbo Frames

2 NAS servers both with 802.3ad bonded gigE nics based on the Realtek 8169 chip.
The highest MTU I could set was 7000 even though the D-Link DGS-1210-24 Rev. A switch can support up to 10k.

Below is just a single sample, but all tests stayed within 57x Mbits for MTU=1500 and 77xMbits for MTU=7000.

The important bits.
iperf was used for this testing.

MTU 1500:
[ 3] 0.0-10.0 sec 687 MBytes 576 Mbits/sec


MTU 7000:
[ 3] 0.0-10.0 sec 926 MBytes 777 Mbits/sec