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need to implement account lockout policy

Hi ALl,


I am looking to implemnet some policy like - If user login 3 times wrong then he should be blocked for 180 seconds and after 180 seconds he should be unlocked - please provide some suggestion how to implement
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apunkabollywood
Asked:
apunkabollywood
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1 Solution
 
madunixChief Information Security Officer Commented:
You can check below article https://access.redhat.com/site/solutions/37687
but it will lock user permanently..not for certain amount of time, to unlock user for particular time you can check this https://access.redhat.com/site/node/15781
http://www.linuxquestions.org/questions/linux-security-4/pam-pam_tally-and-locking-out-users-after-3-failed-login-attempts-in-rhel5-624257/
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serialbandCommented:
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madunixChief Information Security Officer Commented:
Fail2ban check logs for brute force password attempts and bans IP if there are to many attempts. Fail2Ban is typically used for blocking users that are doing bad things (eg: brute-forcing, trying to relay through mail server, etc).  It does this by watching log files that admin specify, and keeping track of how many times an IP shows up with a specific error message.  Once that becomes too many, it creates an IP-tables rule (or performs some other blocking action).  Then (optionally) removes the block after a period of time.  
http://www.howtoforge.com/fail2ban_debian_etch
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apunkabollywoodAuthor Commented:
Hi Madunix - I have tried your initial links and modified pam files but it didnt work - It would be great if you provide some specific steps for the same which works or u in past .
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apunkabollywoodAuthor Commented:
:
My System_auth file:

# User changes will be destroyed the next time authconfig is run.
auth        required      pam_env.so
auth        required      pam_tally.so onerr=fail deny=5 magic_root unlock_time=900
auth        sufficient    pam_unix.so nullok try_first_pass
auth        requisite     pam_succeed_if.so uid >= 500 quiet
auth        required      pam_deny.so

account     required      pam_unix.so
account     sufficient    pam_localuser.so
account     sufficient    pam_succeed_if.so uid < 500 quiet
account     required      pam_permit.so

password    requisite     pam_cracklib.so try_first_pass retry=3 minlen=8 difok=3
password    sufficient    pam_unix.so md5 shadow nullok try_first_pass use_authtok remember=6
password    required      pam_deny.so

session     optional      pam_keyinit.so revoke
session     required      pam_limits.so
session     [success=1 default=ignore] pam_succeed_if.so service in crond quiet use_uid
session     required      pam_unix.so
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Seth SimmonsSr. Systems AdministratorCommented:
second auth line is incorrect; you have pam_tally.so and should be pam_tally2.so
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apunkabollywoodAuthor Commented:
Thanks for help - now it works fine but when i want to exclude root that thing doesnt work...

I tried magic_root but whenevr i am trying to add this .. failog wont capture any false login.

so how to exclude root in this case ?
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Seth SimmonsSr. Systems AdministratorCommented:
have you reviewed everything to make sure nothing was missed?
i am only using that first red hat article madunix listed and it's working fine when i test it
i place those 2 lines in system-auth and password-auth (inserted in both required in rhel 6)
with a test account i was able to lock out

Feb 12 23:03:10 nagios sshd[11166]: pam_tally2(sshd:auth): user nagios (700) tally 5, deny 3

when i attempt multiple failures for root, i can still get in when using correct password beyond the lockout threshold
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apunkabollywoodAuthor Commented:
Hi Seth - my test user working fine but for root i dont want  to include root in it so what should i do for this?
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apunkabollywoodAuthor Commented:
Thank you for your help
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