set ftp user without shell, but cannot login {solved}

[James D. Parra]

Running proftpd on two machines. One has all the ftp users set with
/dev/null as their shell and they can get into their ftp accounts. 

Setup another proftpd server, but ftp users can only login to their ftp
accounts if they have a real shell account, /bin/bash, for example.

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Adding /dev/null to /etc/shells solved the login problem.

James