root : ALL

[root@lcoalhost ~]# tail -1 /etc/security/access.conf
-:user1:ALL

[root@localhost ~]# head -3 /etc/pam.d/sshd
#%PAM-1.0
auth       include      system-auth
account    required     pam_access.so   #I added this line in the file

Jan  1 16:40:06 localhost sshd[17981]: pam_access(sshd:account): access denied for user `user1' from `10.0.1.243'
Jan  1 16:40:06 localhost sshd[17981]: Failed password for user1 from 10.0.1.243 port 3186 ssh2
Jan  1 11:10:06 localhost sshd[17982]: fatal: Access denied for user user1 by PAM account configuration

Jan  1 16:53:29 localhost sshd[19144]: pam_access(sshd:account): access denied for user `root' from `10.0.1.243'
Jan  1 16:53:29 localhost sshd[19144]: Failed password for root from 10.0.1.243 port 3356 ssh2
Jan  1 11:23:29 localhost sshd[19145]: fatal: Access denied for user root by PAM account configuration