Thank you for creating this great tutorial.

Generally everything written in this tutorial went smooth except that I was not able to logon with an ftp-client.

After studying some logfiles I found some entries in  /var/log/auth.log:

vsftpd: PAM unable to dlopen(/lib/security/pam_mysql.so): /lib/security/pam_mysq
vsftpd: PAM adding faulty module: /lib/security/pam_mysql.so

Since my ftp machine (ubuntu 10.04) was actually set up from scratch the pam_mysql.so  module was missing and I installed it using:

sudo aptitude install libpam-mysql

Finally I think I had to restart vsftpd - but I'm not sure if this was really necessary.

Maybe that could help other users to solve their problems.