Editing Sahyog password policy

[[Catagory:Sahyog]]
== Appendix E – Password requirements. ==


 1. Users must change password at least once every 90 days.
 2. Passwords must have minimum length of 7 characters.
 3. Passwords must contains alpha-numeric and special characters.
 4. New passwords cannot be the same as the four previously used passwords.
 5. A user’s account must be locked out after not more than six invalid logon attempts.
 6. Once a user account is locked out, it must remain locked for a minimum of 30 minutes or until a system administrator resets the account.


Public IP

ssh 182.73.247.53 -l root -v



== user’s account must be locked out after not more than six invalid logon attempts ==

 vi /etc/pam.d/system-auth
 account     required      pam_tally2.so
 auth        required      pam_tally2.so  file=/var/log/tallylog deny=5 even_deny_root unlock_time=1800 root_unlock_time=1800


192.168.100.21 done,192.168.100.25 done,192.168.100.24 done,
192.168.100.26 done,192.168.100.22 done


== Set number of days for password Expiration. ==

Users must change their password within the days.
This setting impacts only when creating a user, not impacts to exisiting users.
If set to exisiting users, run the command "chage -M (days) (user)".

 [root@dlp ~]# vi /etc/login.defs
 # line 25: set 90 for Password Expiration
 PASS_MAX_DAYS 90

192.168.100.21 done,192.168.100.25 done,192.168.100.24 done,
192.168.100.26 done,192.168.100.22 done



== Set number of days for warnings before expiration. ==

This setting impacts only when creating a user, not impacts to exisiting users.
If set to exisiting users, run the command "chage -W (days) (user)".

 [root@dlp ~]# vi /etc/login.defs
 # line 28: set 7 for number of days for warnings
 PASS_WARN_AGE 7

192.168.100.21 done,192.168.100.25 done,192.168.100.24 done,
192.168.100.26 done,192.168.100.22 done


== Limit using a password that was used in past. ==
 
Users can not set the same password within the generation.

 [root@dlp ~]# vi /etc/pam.d/system-auth
 # near line 15: prohibit to use the same password for 4 generation in past
 password     sufficient     pam_unix.so sha512 shadow nullok try_first_pass use_authtok remember=4

192.168.100.21 done,192.168.100.25 done,192.168.100.24 done,
192.168.100.26 done,192.168.100.22 done


== Set minimum password length. ==

Users can not set their password length less than this parameter.

 # set 8 for minimum password length
 [root@dlp ~]# authconfig --passminlen=7 --update
 # the parameter is set in a config below
 [root@dlp ~]# grep "^minlen" /etc/security/pwquality.conf 
 minlen = 7

192.168.100.21 done,192.168.100.25 done,192.168.100.24 done,
192.168.100.26 done,192.168.100.22 done



== Set minimum number of required classes of characters for the new password. (kinds ⇒ UpperCase / LowerCase / Digits / Others) ==
 
 # set 2 for minimum number of required classes of characters
 [root@dlp ~]# authconfig --passminclass=2 --update
 # the parameter is set in a config below
 [root@dlp ~]# grep "minclass" /etc/security/pwquality.conf 
 minclass = 2

192.168.100.21 done,192.168.100.25 done,192.168.100.24 done,
192.168.100.26 done,192.168.100.22 done


== Require at least one lowercase character in the new password. ==


 [root@dlp ~]# authconfig --enablereqlower --update
 # the parameter is set in a config below
 # (if you'd like to edit the value, edit it with vi and others)
 [root@dlp ~]# grep "^lcredit" /etc/security/pwquality.conf 
 lcredit = -1

192.168.100.21 done,192.168.100.25 done,192.168.100.24 done,
192.168.100.26 done,192.168.100.22 done


== Require at least one uppercase character in the new password ==


 [root@dlp ~]# authconfig --enablerequpper --update
 # the parameter is set in a config below
 # (if you'd like to edit the value, edit it with vi and others)
 [root@dlp ~]# grep "^ucredit" /etc/security/pwquality.conf 
 ucredit = -1

192.168.100.21 done,192.168.100.25 done,192.168.100.24 done,
192.168.100.26 done,192.168.100.22 done


== Require at least one digit in the new password ==
 
 [root@dlp ~]# authconfig --enablereqdigit --update
 # the parameter is set in a config below
 # (if you'd like to edit the value, edit it with vi and others)
 [root@dlp ~]# grep "^dcredit" /etc/security/pwquality.conf 
 dcredit = -1

192.168.100.21 done,192.168.100.25 done,192.168.100.24 done,
192.168.100.26 done,192.168.100.22 done


== Require at least one other character in the new password. ==

 [root@dlp ~]# authconfig --enablereqother --update
 # the parameter is set in a config below
 # (if you'd like to edit the value, edit it with vi and others)
 [root@dlp ~]# grep "^ocredit" /etc/security/pwquality.conf 
 ocredit = -1

192.168.100.21 done,192.168.100.25 done,192.168.100.24 done,
192.168.100.26 done,192.168.100.22 done


== Set number of characters in the new password that must not be present in the old password. ==
 
 [root@dlp ~]# vi /etc/security/pwquality.conf
 # add to the end
 difok = 5

192.168.100.21 done, 192.168.100.25 done,192.168.100.24 done,
192.168.100.26 done,192.168.100.22 done

RHEL 5  ,192.168.100.29, 192.168.100.30 done

 vi /etc/pam.d/system-auth
 password requisite pam_cracklib.so try_first_pass retry=3 minlength=7 lcredit=1 ucredit=1 dcredit=1 ocredit=1 difok=5



== user’s account must be locked out after not more than six invalid logon attempts  ==

 vi /etc/pam.d/system-auth
 account     required      pam_tally2.so
 auth        required      pam_tally2.so  file=/var/log/tallylog deny=5 even_deny_root unlock_time=1800 root_unlock_time=1800
 password     sufficient     pam_unix.so sha512 shadow nullok try_first_pass use_authtok remember=4


 [root@dlp ~]# vi /etc/login.defs
 # line 28: set 7 for number of days for warnings
 PASS_WARN_AGE 7