[KLUG Members] changed password on server, now can't login

[Adam Tauno Williams]

> I changed a user's password on my Suse 9.2 NIS server and now he can
> only login on a few newer installs of Suse 9.2. He can not login to some
> older Suse or any Redhat machines. The only thing I can see different is
> he has a longer passwd in the shadow file begining with $2a$.
> I believe this is using the newer higher encryption GNU crypt function?

You probably made an MD5 password,  you need to somehow set the password
module to make a crypt password.  See the PAM documentation.

> How can I get the other machines to accept the new password?

How much older?  You might be able to just try the MD5 parameter to the
PAM module doing the authentication (pam_unix?).