i just tested grsecurity. i installed debian and a vulnerable version of proftpd. i launched an exploit. worked. patched the latest kernel with grsec. and now the exploit doesnt work anymore. BUT . wouldnt just a the new kernel alone cause the exploit to fail? the exploit was only for debian sqzeeze and one special version of proftpd??
It did work!
didnt see it in the remote shell but directly on the server