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KDC(8) NetBSD System Manager's Manual KDC(8)
NNAAMMEE
kkddcc - Kerberos 5 server
SSYYNNOOPPSSIISS
kkddcc [--cc _f_i_l_e | ----ccoonnffiigg--ffiillee==_f_i_l_e] [--pp | ----nnoo--rreeqquuiirree--pprreeaauutthh]
[----mmaaxx--rreeqquueesstt==_s_i_z_e] [--HH | ----eennaabbllee--hhttttpp] [--rr _s_t_r_i_n_g | ----vv44--rreeaallmm==_s_t_r_i_n_g]
[--KK | ----nnoo--kkaasseerrvveerr] [--rr _r_e_a_l_m] [----vv44--rreeaallmm==_r_e_a_l_m] [--PP _s_t_r_i_n_g |
----ppoorrttss==_s_t_r_i_n_g] [----aaddddrreesssseess==_l_i_s_t _o_f _a_d_d_r_e_s_s_e_s]
DDEESSCCRRIIPPTTIIOONN
kkddcc serves requests for tickets. When it starts, it first checks the
flags passed, any options that are not specified with a command line flag
is taken from a config file, or from a default compiled-in value.
Options supported:
--cc _f_i_l_e, ----ccoonnffiigg--ffiillee==_f_i_l_e
Specifies the location of the config file, the default is
_/_v_a_r_/_h_e_i_m_d_a_l_/_k_d_c_._c_o_n_f. This is the only value that can't be
specified in the config file.
--pp, ----nnoo--rreeqquuiirree--pprreeaauutthh
Turn off the requirement for pre-autentication in the initial AS-
REQ for all principals. The use of pre-authentication makes it
more difficult to do offline password attacks. You might want to
turn it off if you have clients that doesn't do pre-authentica-
tion. Since the version 4 protocol doesn't support any pre-au-
thentication, so serving version 4 clients is just about the same
as not requiring pre-athentication. The default is to require
pre-authentication. Adding the require-preauth per principal is a
more flexible way of handling this.
----mmaaxx--rreeqquueesstt==_s_i_z_e
Gives an upper limit on the size of the requests that the kdc is
willing to handle.
--HH, ----eennaabbllee--hhttttpp
Makes the kdc listen on port 80 and handle requests encapsulated
in HTTP.
--KK, ----nnoo--kkaasseerrvveerr
Disables kaserver emulation (in case it's compiled in).
--rr _r_e_a_l_m, ----vv44--rreeaallmm==_r_e_a_l_m
What realm this server should act as when dealing with version 4
requests. The database can contain any number of realms, but
since the version 4 protocol doesn't contain a realm for the
server, it must be explicitly specified. The default is whatever
is returned by kkrrbb__ggeett__llrreeaallmm(). This option is only availabe if
the KDC has been compiled with version 4 support.
--PP _s_t_r_i_n_g, ----ppoorrttss==_s_t_r_i_n_g
Specifies the set of ports the KDC should listen on. It is given
as a white-space separated list of services or port numbers.
----aaddddrreesssseess==_l_i_s_t _o_f _a_d_d_r_e_s_s_e_s
The list of addresses to listen for requests on. By default, the
kdc will listen on all the locally configured addresses. If only
a subset is desired, or the automatic detection fails, this op-
tion might be used.
All activities , are logged to one or more destinations, see
krb5.conf(5), and krb5_openlog(3). The entity used for logging is kkddcc.
CCOONNFFIIGGUURRAATTIIOONN FFIILLEE
The configuration file has the same syntax as krb5.conf(5), but will be
read before _/_e_t_c_/_k_r_b_5_._c_o_n_f, so it may override settings found there. Op-
tions specific to the KDC only are found in the ``[kdc]'' section. All
the command-line options can preferably be added in the configuration
file. The only difference is the pre-authentication flag, that has to be
specified as:
require-preauth = no
(in fact you can specify the option as ----rreeqquuiirree--pprreeaauutthh==nnoo).
And there are some configuration options which do not have command-line
equivalents:
check-ticket-addresses = _b_o_o_l_e_a_n
Check the addresses in the ticket when processing TGS re-
quests. The default is FALSE.
allow-null-ticket-addresses = _b_o_o_l_e_a_n
Permit tickets with no addresses. This option is only rele-
vant when check-ticket-addresses is TRUE.
allow-anonymous = _b_o_o_l_e_a_n
Permit anonymous tickets with no addresses.
encode_as_rep_as_tgs_rep = _b_o_o_l_e_a_n
Encode AS-Rep as TGS-Rep to be bug-compatible with old DCE
code. The Heimdal clients allow both.
kdc_warn_pwexpire = _t_i_m_e
How long before password/principal expiration the KDC should
start sending out warning messages.
An example of a config file:
[kdc]
require-preauth = no
v4-realm = FOO.SE
key-file = /key-file
BBUUGGSS
If the machine running the KDC has new addresses added to it, the KDC
will have to be restarted to listen to them. The reason it doesn't just
listen to wildcarded (like INADDR_ANY) addresses, is that the replies has
to come from the same address they were sent to, and most OS:es doesn't
pass this information to the application. If your normal mode of opera-
tion require that you add and remove addresses, the best option is proba-
bly to listen to a wildcarded TCP socket, and make sure your clients use
TCP to connect. For instance, this will listen to IPv4 TCP port 88 only:
kdc --addresses=0.0.0.0 --ports="88/tcp"
There should be a way to specify protocol, port, and address triplets,
not just addresses and protocol, port tuples.
SSEEEE AALLSSOO
kinit(1), krb5.conf(5)
HEIMDAL August 22, 2002 2
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