HPC cluster public network open security reinforcement and resource display, hpc cluster open reinforcement

HPC cluster public network open security reinforcement and resource display, hpc cluster open reinforcement
1. Force password change upon Logon

[Root @ node24 ~] # Cat/etc/passwd | tail-31 | awk-F ":" '{print $1}'> user

[Root @ node24 ~] # For I in 'cat user'; do chage-d 0 $ I; done

 

2. Set Password Complexity

[Root @ node24 ~] # Cat/etc/pam. d/system-auth

# % PAM-1.0

# This file is auto-generated.

# User changes will be destroyed the next time authconfig is run.

Auth required pam_env.so

Auth sufficient pam_fprintd.so

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 type =

Password requisite pam_cracklib.so try_first_pass retry = 5 difok = 3 minlen = 8 ucredit =-1 lcredit =-1 dcredit =-1 dictpath =/usr/share/cracklib/pw_dict

Password sufficient pam_unix.so sha512 shadow nullok try_first_pass use_authtok

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

[Root @ node24 ~] #

 

Number of attempts: 5

Minimum number of different characters: 3

Minimum Password Length: 8

Minimum capital letters: 1

Minimum lowercase letters: 1

Minimum Number: 1

Password dictionary:/usr/share/cracklib/pw_dict

 

3. Minimum number of digits for password Modification

[Root @ node24 ~] # Vi/etc/login. defs

......

PASS_MAX_DAYS 99999

PASS_MIN_DAYS 0

PASS_MIN_LEN 8

PASS_WARN_AGE 7

......

 

4. Synchronize users hourly (the management node is independent of the logon node)

[Root @ node24 ~] # Cat <EOF>/etc/cron. hourly/sync_user.cron

> Clusconf -- sync-user

> EOF

[Root @ node24 ~] #

 

5. Record History commands to public directories

[Root @ node24 ~] # Cat <EOF>/etc/profile. d/Sugon_history.sh

> Export HISTTIMEFORMAT = '% F % t'

> Export HISTSIZE = 10000

> Export HISTFILESIZE = 10000

> Export HISTFILE =/public/sourcecode/Sugon_history_log

> Shopt-s histappend

> PROMPT_COMMAND = "history-a; \ $ PROMPT_COMMAND"

> Export HOSTCONTROL = ignoredups

>

> EOF

[Root @ node24 ~] # Source/etc/profile. d/Sugon_history.sh

 

6 restrict normal users from wasting login node resources

[Root @ node24 ~] # Cat <EOF>/etc/security/limits. conf

> @ Users-rss 16777216 # limits the maximum memory usage of each user in the users Group to 16 GB.

> @ Users-maxlogins 6 # limit a maximum of 6 concurrent users in a single user group

> @ Users-nproc 16 # displays a maximum of 16 concurrent processes for a single user in the users Group

>

> EOF

[Root @ node24 ~] #