### `osconf.h`

There is one configuration file which you may wish to edit to control various compile-time parameters in the Kerberos distribution: `include/krb5/stock/osconf.h`. The list that follows is by no means complete, just some of the more interesting variables.

Please note: The former configuration file `config.h` no longer exists as its functionality has been merged into the auto-configuration process. See Options to Configure.

`DEFAULT_PROFILE_PATH`
  The pathname to the file which contains the profiles for the known realms, their KDCs, etc. The default value is /etc/krb5.conf.

  The profile file format is no longer the same format as Kerberos V4's `krb.conf` file.

`DEFAULT_KEYTAB_NAME`
  The type and pathname to the default server keytab file (the equivalent of Kerberos V4's `/etc/srvtab`). The default is /etc/krb5.keytab.
`DEFAULT_KDC_ENCTYPE`
  The default encryption type for the KDC. The default value is des3-cbc-sha1.
`KDCRCACHE`
  The name of the replay cache used by the KDC. The default value is krb5kdc_rcache.
`RCTMPDIR`
  The directory which stores replay caches. The default is to try /var/tmp, /usr/tmp, /var/usr/tmp, and /tmp.
`DEFAULT_KDB_FILE`
  The location of the default database. The default value is /usr/local/var/krb5kdc/principal.