Kerberos Keytab Error
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/etc/krb5.keytab Missing
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Klist: Key Table File '/etc/krb5.keytab' Not Found While Starting Keytab Scan
it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top error reading keytab file krb5.keytab up vote failed to read keytab sssd 4 down vote favorite 1 I've noticed these kerberos keytab error messages on both SLES 11.2 and CentOS 6.3: sshd[31442]: pam_krb5[31442]: error reading keytab 'FILE: / etc/ krb5. keytab' /etc/krb5.keytab does not exist on our hosts, and from what I understand of the keytab file, we don't need it. Per this kerberos keytab introduction: A keytab is a file containing pairs of Kerberos principals and encrypted keys (these are derived from the Kerberos password). keytab file windows You can use this file to log into Kerberos without being prompted for a password. The most common personal use of keytab files is to allow scripts to authenticate to Kerberos without human interaction, or store a password in a plaintext file. This sounds like something we do not need and is perhaps better security-wise to not have it. How can I keep this error from popping up in our system logs? Here is my krb5.conf if its useful: banjer@myhost:~> cat /etc/krb5.conf # This file managed by Puppet # [libdefaults] default_tkt_enctypes = RC4-HMAC DES-CBC-MD5 DES-CBC-CRC default_tgs_enctypes = RC4-HMAC DES-CBC-MD5 DES-CBC-CRC preferred_enctypes = RC4-HMAC DES-CBC-MD5 DES-CBC-CRC default_realm = FOO.EXAMPLE.COM dns_lookup_kdc = true clockskew = 300 [logging] default = SYSLOG:NOTICE:DAEMON kdc = FILE:/var/log/kdc.log kadmind = FILE:/var/log/kadmind.log [appdefaults] pam = { ticket_lifetime = 1d renew_lifetime = 1d forwardable = true proxiable = false retain_after_close = false minimum_uid = 0 debug = false banner = "Enter your current" } Let me know if you need to see any other configs. Thanks. EDIT This message shows up in /var/log/secure whenever a non-root user logs in via SSH or the console. It seems to only occur with password-based authentication. If I do a key-based ssh to a server, I don't see the error. If I log in with root, I do not see the error. O
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Kadmin Create Keytab
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Keytab Contains No Suitable Keys
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a keytab, and how do I use one? On this page: Introduction Creating a keytab file Using a keytab to authenticate scripts Listing the keys in a keytab file https://kb.iu.edu/d/aumh Deleting a key from a keytab file Merging keytab files Copying a keytab file to another computer Introduction A keytab is a file containing pairs of Kerberos principals and encrypted keys (which are derived from the Kerberos password). You can use a keytab file to authenticate to various remote systems using Kerberos without entering a password. However, when you change your Kerberos password, you failed to will need to recreate all your keytabs. Keytab files are commonly used to allow scripts to automatically authenticate using Kerberos, without requiring human interaction or access to password stored in a plain-text file. The script is then able to use the acquired credentials to access files stored on a remote system. Important: Anyone with read permission on a keytab file can use all the keys failed to read in the file. To prevent misuse, restrict access permissions for any keytab files you create. For instructions, see In Unix, how do I change the permissions for a file? Back to top Creating a keytab file Note: To use the instructions and examples on this page, you need access to a Kerberos client, on either your personal workstation or a UITS research computing system. When following the examples on this page, enter the commands exactly as they are shown. You may need to modify your path to include the location of ktutil (e.g., /usr/sbin or /usr/kerberos/sbin). You can create keytab files on any computer that has a Kerberos client installed. Keytab files are not bound to the systems on which they were created; you can create a keytab file on one computer and copy it for use on other computers. Following is an example of the keytab file creation process using MIT Kerberos: > ktutil ktutil: addent -password -p username@ADS.IU.EDU -k 1 -e rc4-hmac Password for username@ADS.IU.EDU: [enter your password] ktutil: addent -password -p username@ADS.IU.EDU -k 1 -e aes256-cts Password for username@ADS.IU.EDU: [enter your password] ktutil: wkt username.keytab ktutil: quit Following is