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MIT Kerberos Documentation

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MIT Kerberos defaults

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General defaults

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Description
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Default
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Environment
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keytab file
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DEFKTNAME
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KRB5_KTNAME
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Client keytab file
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DEFCKTNAME
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KRB5_CLIENT_KTNAME
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Kerberos config file krb5.conf
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/etc/krb5.conf:SYSCONFDIR/krb5.conf
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KRB5_CONFIG
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KDC config file kdc.conf
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LOCALSTATEDIR/krb5kdc/kdc.conf
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KRB5_KDC_PROFILE
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GSS mechanism config file
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SYSCONFDIR/gss/mech
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GSS_MECH_CONFIG
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KDC database path (DB2)
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LOCALSTATEDIR/krb5kdc/principal
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Master key stash file
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LOCALSTATEDIR/krb5kdc/.k5.realm
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Admin server ACL file kadm5.acl
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LOCALSTATEDIR/krb5kdc/kadm5.acl
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OTP socket directory
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RUNSTATEDIR/krb5kdc
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Plugin base directory
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LIBDIR/krb5/plugins
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replay cache directory
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/var/tmp
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KRB5RCACHEDIR
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Master key default enctype
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aes256-cts-hmac-sha1-96
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Default keysalt list
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aes256-cts-hmac-sha1-96:normal aes128-cts-hmac-sha1-96:normal
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Permitted enctypes
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aes256-cts-hmac-sha1-96 aes128-cts-hmac-sha1-96 aes256-cts-hmac-sha384-192 aes128-cts-hmac-sha256-128 des3-cbc-sha1 arcfour-hmac-md5 camellia256-cts-cmac camellia128-cts-cmac
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KDC default port
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88
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Admin server port
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749
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Password change port
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464
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Replica KDC propagation defaults

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This table shows defaults used by the kprop and

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kpropd programs.

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Description
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Default
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Environment
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kprop database dump file
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LOCALSTATEDIR/krb5kdc/replica_datatrans
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kpropd temporary dump file
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LOCALSTATEDIR/krb5kdc/from_master
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kdb5_util location
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SBINDIR/kdb5_util
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kprop location
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SBINDIR/kprop
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kpropd ACL file
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LOCALSTATEDIR/krb5kdc/kpropd.acl
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kprop port
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754
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KPROP_PORT
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Default paths for Unix-like systems

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On Unix-like systems, some paths used by MIT krb5 depend on parameters

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chosen at build time.  For a custom build, these paths default to
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subdirectories of /usr/local.  When MIT krb5 is integrated into an
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operating system, the paths are generally chosen to match the
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operating system’s filesystem layout.

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Description
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Symbolic name
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Custom build path
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Typical OS path
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User programs
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BINDIR
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/usr/local/bin
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/usr/bin
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Libraries and plugins
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LIBDIR
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/usr/local/lib
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/usr/lib
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Parent of KDC state dir
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LOCALSTATEDIR
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/usr/local/var
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/var
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Parent of KDC runtime dir
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RUNSTATEDIR
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/usr/local/var/run
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/run
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Administrative programs
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SBINDIR
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/usr/local/sbin
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/usr/sbin
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Alternate krb5.conf dir
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SYSCONFDIR
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/usr/local/etc
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/etc
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Default ccache name
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DEFCCNAME
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FILE:/tmp/krb5cc_%{uid}
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FILE:/tmp/krb5cc_%{uid}
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Default keytab name
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DEFKTNAME
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FILE:/etc/krb5.keytab
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FILE:/etc/krb5.keytab
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The default client keytab name (DEFCKTNAME) typically defaults to

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FILE:/usr/local/var/krb5/user/%{euid}/client.keytab for a custom
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build.  A native build will typically use a path which will vary
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according to the operating system’s layout of /var.

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On this page

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  • MIT Kerberos defaults
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    • General defaults
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    • Replica KDC propagation defaults
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    • Default paths for Unix-like systems
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      Table of contents

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      • For users
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      • For administrators
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        • Installation guide
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        • Configuration Files
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        • Realm configuration decisions
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        • Database administration
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        • Database types
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        • Account lockout
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        • Configuring Kerberos with OpenLDAP back-end
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        • Application servers
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        • Host configuration
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        • Backups of secure hosts
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        • PKINIT configuration
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        • OTP Preauthentication
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        • SPAKE Preauthentication
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        • Addressing dictionary attack risks
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        • Principal names and DNS
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        • Encryption types
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        • HTTPS proxy configuration
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        • Authentication indicators
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        • Administration programs
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        • MIT Kerberos defaults
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        • Environment variables
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        • Troubleshooting
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        • Advanced topics
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        • Various links
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        • For application developers
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        • For plugin module developers
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        • Building Kerberos V5
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        • Kerberos V5 concepts
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        • Protocols and file formats
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        • MIT Kerberos features
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        • How to build this documentation from the source
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        • Contributing to the MIT Kerberos Documentation
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        • Resources
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          Full Table of Contents

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          Release: 1.18.2
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                          © Copyright 1985-2020, MIT.
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