root@gate:~# apt-get install opie-server

gate# su user1
$ opiepasswd -c -f
...
Enter new secret pass phrase: opassword1
Again new secret pass phrase: opassword1
...

gate# cat /etc/opiekeys
user1 0497 g23394           81a663d5347407bb  Oct 19,2006 09:48:53

Не требуется настройки

[gate:~] # grep opie /etc/pam.d/sshd
auth            sufficient      pam_opie.so             no_warn no_fake_prompts
auth            requisite       pam_opieaccess.so       no_warn allow_local

[gate:~] # cat /etc/ssh/sshd_config
...
#ChallengeResponseAuthentication yes
...

root@gate:~# cat /etc/ssh/sshd_config 
...
ChallengeResponseAuthentication yes
...

root@gate:~# cat /etc/pam.d/sshd 
...
auth    sufficient      pam_opie.so
# Standard Un*x authentication.
...

root@gate:~# /etc/init.d/ssh restart

$ opiekey 498 g23394
...
Enter secret pass phrase: opiepasswd
PER AND BURT SEE DIVE GILD

$ opiekey -n 6 497 g23394
...
Enter secret pass phrase: opiepasswd
492: AURA BATH MAUL WASH OWN FIST
...
497: FLAG PEP VOID CODA TIC SKID

http://sourceforge.net/projects/otp-j2me/