A keytab can also be used as a cache for obtaining Kerberos Ticket-Granting-Tickets (TGTs), but that is for when you want your host to act as a client for a Kerberos server, not as a server. pam_krb5 uses the keytab to verify that the password typed is the actual password in the KDC.

I would like to know if it’s possible to create a keytab file direct from a client machine without using the ktpass utility in the Windows Server side. The main reason I would want this, is to automatically enable the integration of Kerberos authentication from Windows Active Directory in Linux machines using some shell scripts. Thanks

The first command (which creates the .keytab file) should specify /out only, but for all subsequent additions you specify both /in and /out, with both pointing at the same file, and this will append the subsequent keys onto the existing keytab file specified. Found this information here (more info and examples can be found at this link as well):

2025年2月7日 · I'm trying to write an idempotent script for Linux (MIT kerberos) that applies a given keytab to /etc/krb5.keytab by merging with its existing content. On MacOS (which, I believe uses Heimdal) it's...

2013年3月14日 · The primary use of the local keytab during local authentication is to protect against KDC spoofing. Kerberos login authentication works by requesting a TGT from the Kerberos KDC and then decrypting it with a key formed from the password entered locally. If that decryption works, the login is considered successful (if there's no keytab).

2015年3月7日 · Then we create a new keytab based on the system keytab and in this new keytab delete all but the HTTP SPNs: # ktutil ktutil: rkt /etc/krb5.keytab ktutil: list ktutil: delent <number of non-HTTP entry>

2014年8月15日 · It's a terrible idea for a keytab that you want to use for some automated process as it will randomize the password and make the account unusable without the keytab. If you are using the keytab as a password store to feed to kinit to automate a process, I would suggest you use whatever enctype that you get when you run kinit using a password.

Update the keytab for the host from the KDC where. ipahostname.mydomain.com is the fully qualified domain name of the IPA server; host/[email protected] is the service principal for the host ipahostname.mydomain.com in the mydomain.com realm /etc/krb5.keytab is the location of the system keytab being used. This path is the default for many ...

My working example is NFSv4, which requires each client to have a Kerberos keytab locally on the client machines (as well as the NFS server hosts). What badness, if any, could result from sharing the same key in a generic keytab file (for NFS purposes) between all client machines requiring access to the NFS host(s)?

2017年5月24日 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.