Kvno
The kvno command is a powerful utility for managing
Kerberos service tickets. It allows users to obtain and display
service tickets for specified principals, which is crucial for
authentication in Kerberos-enabled environments. This tool is
essential for administrators and developers working with Kerberos to
verify and troubleshoot authentication processes.
Obtain Kerberos Service Ticket
The primary function of kvno is to obtain a service
ticket for a given principal. This is the fundamental step in
establishing a secure session with a Kerberos-protected service.
# kvno
# Obtain and display the Kerberos service ticket for a specified principal.
# Obtain a service ticket for a specific principal
kvno [principal_name]
Manage Multiple Service Tickets
kvno can also be used to obtain service tickets for
multiple principals simultaneously, streamlining the process when
dealing with various services.
# Obtain service tickets for multiple specified principals
kvno [principal1_name] [principal2_name] [principal3_name]
Obtain Ticket for Current User
For convenience, kvno can retrieve a service ticket for
the current user's primary principal, often used for accessing local
services.
# Obtain and display a service ticket for the current user's primary principal
kvno host/[hostname]
Advanced Ticket Options
The tool supports advanced options for obtaining tickets, including specifying encryption types, enabling verbose output for detailed information, and selecting specific Key Distribution Centers (KDCs).
# Obtain a service ticket with a specified encryption type (e.g., aes256-cts)
kvno -e [enctype] [principal_name]
# Obtain a service ticket with verbose output to show detailed information
kvno -verbose [principal_name]
# Obtain a service ticket from a specific Key Distribution Center (KDC)
kvno -c [cache_name] [principal_name]
# Allows for proxiable tickets
kvno -P [principal_name]
# Specifies the keytab from which credentials are accessed
kvno -k [keytab] [principal_name]