Pam Error Reading Keytab
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/etc/krb5.keytab Missing
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Failed To Read Keytab Sssd
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Key Version Number For Principal In Key Table Is Incorrect
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Failed To Join Domain Failed To Connect To Ad Cannot Read Password
Gigs Live Careers Vendor Services Groups Website Testing Store Headlines Experts Exchange > Questions > Kerberos Authentication Want to Advertise ktutil Here? Solved Kerberos Authentication Posted on 2008-06-10 Linux Linux Security 1 Verified Solution 7 Comments 2,937 Views Last Modified: 2013-12-16 I've setup Kerberos authentication on a Linux box to authenticate users against an Active https://access.redhat.com/discussions/626593 Directory domain. It is working, however, for each domain user that authenticates I get the following in /var/log/secure: Jun 10 08:58:27 dev sshd[8532]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=123.456.789.123 user=bjones Jun 10 08:58:27 dev sshd[8532]: pam_krb5[8532]: authentication succeeds for 'bjones' (bjones@CORP.DOMAIN.LAN) Jun 10 08:58:27 dev sshd[8532]: Accepted password for bjones from 123.456.789.123 port 2716 ssh2 Jun 10 08:58:27 dev sshd[8532]: pam_unix(sshd:session): session opened for user https://www.experts-exchange.com/questions/23472151/Kerberos-Authentication.html bjones by (uid=0) The problem I have with this is the 'authentication failure' log for all of the domain users (because it is failing to authenticate locally). So I edited /etc/pam.d/system-auth and changed: auth required pam_env.so auth sufficient pam_unix.so nullok try_first_pass auth requisite pam_succeed_if.so uid >= 500 quiet auth sufficient pam_krb5.so use_first_pass auth required pam_deny.so to: auth required pam_env.so auth sufficient pam_krb5.so use_first_pass auth sufficient pam_unix.so nullok try_first_pass auth requisite pam_succeed_if.so uid >= 500 quiet auth required pam_deny.so Which works, however, now I present myself with another problem that I need to restrict domain authentication to user IDs 500 and above. With the above change, users such as 'root' in the domain will authenticate with credentials from active directory. So I switched it back to the original (moved "auth sufficient pam_krb5.so use_first_pass" back down). I also changed the "... >= 500 quiet" to "... >= 700 quiet" so that I could still cre
The module expects its configuration information to be in the pam subsection of the appdefaults section. Directives Directives which take a true, false, or a PAM service name can also be selectively disabled https://linux.die.net/man/5/pam_krb5 for specific PAM services using the related "no_" option (exceptions to "debug = true" can be made using "no_debug", for example). debug = true|false|service [...] turns on debugging via syslog(3). Debug messages are logged with priority LOG_DEBUG. debug_sensitive = true|false|service [...] turns on debugging of sensitive information via syslog(3). Debug messages are logged with priority LOG_DEBUG. addressless = true|false|service [...] if set, requests a TGT failed to with no address information. This can be necessary if you are using Kerberos through a NAT, or on systems whose IP addresses change regularly. This directive is deprecated in favor of the libdefaults noaddresses directive. afs_cells = cell.example.com [...] tells pam_krb5.so to obtain tokens for the listed cells, in addition to the local cell and the cell which contains the user's home directory, for the user. failed to read The module will guess the principal name of the AFS service for the listed cells, or it can be specified by listing cells in the form cellname=principalname. banner = Kerberos 5 specifies what sort of password the module claims to be changing whenever it is called upon to change passwords. The default is Kerberos 5. ccache_dir = /var/tmp specifies the directory in which to place credential cache files. The default is /tmp. ccname_template = KEYRING:krb5cc_%U_%P ccname_template = FILE:%d/krb5cc_%U_XXXXXX specifies the location in which to place the user's session-specific credential cache. This value is treated as a template, and these sequences are substituted: %u login name %U login UID %p principal name %r realm name %h home directory %d the default ccache directory (as set with ccache_dir) %P the current process ID %% literal '%'The default is FILE:%d/krb5cc_%U_XXXXXX". chpw_prompt = true|false|service [...] tells pam_krb5.so to allow expired passwords to be changed during authentication attempts. While this is the traditional behavior exhibited by "kinit", it is inconsistent with the behavior expected by PAM, which expects authentication to (appear to) succeed, only to have password expiration be flagged by a subsequent call to the account management func