Posts from 2009-10

M-Audio Transit USB

Hardware

I took a couple of images of the hardware and put them on PicasaWeb: https://picasaweb.google.com/111743287730172647732/MAudioTransitUSB.

The ICs used are:

  • U1 TI TAS1020A (8052 w/USB audio streaming) Stereo USB Audio Interface
  • U2 uC 24LC64 (serial EEPROM) 64 Kbit Electrically Erasable PROM
  • U3 AKM AK4584VQ (audio) 24Bit 96kHz Audio CODEC with DIT/DIR
  • U4 1117M3...

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Set Your Physical NIC to a Different MAC Address

It's called MAC spoofing.

The commands do achieve it are:

  1. Bring down the interface and enter a new MAC address
  2. Bring up the interface

On Ubuntu Linux this can be achieved (for nic eth1 and a new mac address of 00:14:11:12:34:15) like this:

sudo ifconfig eth1 down hw ether 00:14:11:12:34:15
sudo ifconfig eth1 up

To...

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checksum offloading - wireshark

http://www.wireshark.org/docs/wsug_html_chunked/ChAdvChecksums.html

If wireshark reports many wrong checksums, this can be caused by checksum calculations done by hardware which means that the wrong checksums reported by Wireshark are simply meaningless.

If you're sure, that's the problem, you may simple not care about wrong checksums:

  • Turn off the checksum offloading in the network...

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DD-WRT on the ASUS WL-500G Premium v1 WiFi Router

WOL – Wakeup Computers via LAN

to wake up the computers on the homenetwork use the following commands (execute on the router) connect to the router first:

ssh root@your.dyndns.org

And wake up the computer with the network interface with the MAC 00:11:24:xx:yy:zz (assuming it is in the network 192.168.1.1/24):

/usr/sbin/wol -i...

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