putty send null

Question

Using Putty, how can someone send a null character, ie \0

I have seen control+@ but that doesnt seem to work.

I'm trying to do manual SMTP AUTH:

EHLO
AUTH PLAIN username\0\0password

Answer 1

The following worked for me when using PuTTY on windows with a local serial port.

1. Under Window->Translation choose "ISO-8859-1:1998 (Latin-1, West Europe)"
2. Send your null using alt+0256

On Mac I used the 'screen' program.

1. Open the OS X terminal program, and run screen /dev/tty.SLAB_USBtoUART 115200 Use the path of your own serial device, something in /dev/tty.* 115200 was the baud for my specific device.
2. Send null with ^@ (Ctrl+Shift+2). See This SU Post

References:

1. Serial Console on OSX
2. SU Post