1.\" $Id: kdc.8,v 1.17 2002/08/28 21:09:05 joda Exp $
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32.\" $Id: kdc.8,v 1.23 2003/04/06 17:48:40 lha Exp $
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|
3.Dd August 22, 2002
4.Dt KDC 8
5.Os HEIMDAL
6.Sh NAME
7.Nm kdc
8.Nd Kerberos 5 server
9.Sh SYNOPSIS
10.Nm
11.Oo Fl c Ar file \*(Ba Xo
12.Fl -config-file= Ns Ar file
13.Xc
14.Oc
15.Op Fl p | Fl -no-require-preauth
16.Op Fl -max-request= Ns Ar size
17.Op Fl H | Fl -enable-http
| 34.Dd August 22, 2002
35.Dt KDC 8
36.Os HEIMDAL
37.Sh NAME
38.Nm kdc
39.Nd Kerberos 5 server
40.Sh SYNOPSIS
41.Nm
42.Oo Fl c Ar file \*(Ba Xo
43.Fl -config-file= Ns Ar file
44.Xc
45.Oc
46.Op Fl p | Fl -no-require-preauth
47.Op Fl -max-request= Ns Ar size
48.Op Fl H | Fl -enable-http
|
| 49.Op Fl -no-524
50.Op Fl -kerberos4
51.Op Fl -kerberos4-cross-realm
|
18.Oo Fl r Ar string \*(Ba Xo
19.Fl -v4-realm= Ns Ar string
20.Xc
21.Oc
| 52.Oo Fl r Ar string \*(Ba Xo
53.Fl -v4-realm= Ns Ar string
54.Xc
55.Oc
|
22.Op Fl K | Fl -no-kaserver
23.Op Fl r Ar realm
24.Op Fl -v4-realm= Ns Ar realm
25.Oo Fl P Ar string \*(Ba Xo
26.Fl -ports= Ns Ar string
| 56.Op Fl K | Fl -kaserver
57.Oo Fl P Ar portspec \*(Ba Xo
58.Fl -ports= Ns Ar portspec
|
27.Xc
28.Oc
| 59.Xc
60.Oc
|
| 61.Op Fl -detach
|
29.Op Fl -addresses= Ns Ar list of addresses
30.Sh DESCRIPTION
31.Nm
| 62.Op Fl -addresses= Ns Ar list of addresses
63.Sh DESCRIPTION
64.Nm
|
32serves requests for tickets. When it starts, it first checks the flags
33passed, any options that are not specified with a command line flag is
34taken from a config file, or from a default compiled-in value.
| 65serves requests for tickets.
66When it starts, it first checks the flags passed, any options that are
67not specified with a command line flag are taken from a config file,
68or from a default compiled-in value.
|
35.Pp
36Options supported:
37.Bl -tag -width Ds
38.It Xo
39.Fl c Ar file ,
40.Fl -config-file= Ns Ar file
41.Xc
42Specifies the location of the config file, the default is
43.Pa /var/heimdal/kdc.conf .
44This is the only value that can't be specified in the config file.
45.It Xo
46.Fl p ,
47.Fl -no-require-preauth
48.Xc
49Turn off the requirement for pre-autentication in the initial AS-REQ
| 69.Pp
70Options supported:
71.Bl -tag -width Ds
72.It Xo
73.Fl c Ar file ,
74.Fl -config-file= Ns Ar file
75.Xc
76Specifies the location of the config file, the default is
77.Pa /var/heimdal/kdc.conf .
78This is the only value that can't be specified in the config file.
79.It Xo
80.Fl p ,
81.Fl -no-require-preauth
82.Xc
83Turn off the requirement for pre-autentication in the initial AS-REQ
|
50for all principals. The use of pre-authentication makes it more
51difficult to do offline password attacks. You might want to turn it
52off if you have clients that doesn't do pre-authentication. Since the
53version 4 protocol doesn't support any pre-authentication, so serving
54version 4 clients is just about the same as not requiring
55pre-athentication. The default is to require
56pre-authentication. Adding the require-preauth per principal is a more
57flexible way of handling this.
| 84for all principals.
85The use of pre-authentication makes it more difficult to do offline
86password attacks.
87You might want to turn it off if you have clients
88that don't support pre-authentication.
89Since the version 4 protocol doesn't support any pre-authentication,
90serving version 4 clients is just about the same as not requiring
91pre-athentication.
92The default is to require pre-authentication.
93Adding the require-preauth per principal is a more flexible way of
94handling this.
|
58.It Xo
59.Fl -max-request= Ns Ar size
60.Xc
61Gives an upper limit on the size of the requests that the kdc is
62willing to handle.
63.It Xo
64.Fl H ,
65.Fl -enable-http
66.Xc
67Makes the kdc listen on port 80 and handle requests encapsulated in HTTP.
68.It Xo
| 95.It Xo
96.Fl -max-request= Ns Ar size
97.Xc
98Gives an upper limit on the size of the requests that the kdc is
99willing to handle.
100.It Xo
101.Fl H ,
102.Fl -enable-http
103.Xc
104Makes the kdc listen on port 80 and handle requests encapsulated in HTTP.
105.It Xo
|
69.Fl K ,
70.Fl -no-kaserver
| 106.Fl -no-524
|
71.Xc
| 107.Xc
|
72Disables kaserver emulation (in case it's compiled in).
| 108don't respond to 524 requests
|
73.It Xo
| 109.It Xo
|
74.Fl r Ar realm ,
75.Fl -v4-realm= Ns Ar realm
| 110.Fl -kerberos4
|
76.Xc
| 111.Xc
|
| 112respond to Kerberos 4 requests
113.It Xo
114.Fl -kerberos4-cross-realm
115.Xc
116respond to Kerberos 4 requests from foreign realms.
117This is a known security hole and should not be enabled unless you
118understand the consequences and are willing to live with them.
119.It Xo
120.Fl r Ar string ,
121.Fl -v4-realm= Ns Ar string
122.Xc
|
77What realm this server should act as when dealing with version 4
| 123What realm this server should act as when dealing with version 4
|
78requests. The database can contain any number of realms, but since the
79version 4 protocol doesn't contain a realm for the server, it must be
80explicitly specified. The default is whatever is returned by
| 124requests.
125The database can contain any number of realms, but since the version 4
126protocol doesn't contain a realm for the server, it must be explicitly
127specified.
128The default is whatever is returned by
|
81.Fn krb_get_lrealm .
82This option is only availabe if the KDC has been compiled with version
834 support.
84.It Xo
| 129.Fn krb_get_lrealm .
130This option is only availabe if the KDC has been compiled with version
1314 support.
132.It Xo
|
85.Fl P Ar string ,
86.Fl -ports= Ns Ar string
| 133.Fl K ,
134.Fl -kaserver
|
87.Xc
| 135.Xc
|
88Specifies the set of ports the KDC should listen on. It is given as a
| 136Enable kaserver emulation (in case it's compiled in).
137.It Xo
138.Fl P Ar portspec ,
139.Fl -ports= Ns Ar portspec
140.Xc
141Specifies the set of ports the KDC should listen on.
142It is given as a
|
89white-space separated list of services or port numbers.
90.It Fl -addresses= Ns Ar list of addresses
| 143white-space separated list of services or port numbers.
144.It Fl -addresses= Ns Ar list of addresses
|
91The list of addresses to listen for requests on. By default, the kdc
92will listen on all the locally configured addresses. If only a subset
93is desired, or the automatic detection fails, this option might be used.
| 145The list of addresses to listen for requests on.
146By default, the kdc will listen on all the locally configured
147addresses.
148If only a subset is desired, or the automatic detection fails, this
149option might be used.
|
94.El
95.Pp
| 150.El
151.Pp
|
96All activities , are logged to one or more destinations, see
| 152All activities are logged to one or more destinations, see
|
97.Xr krb5.conf 5 ,
98and
99.Xr krb5_openlog 3 .
100The entity used for logging is
101.Nm kdc .
102.Sh CONFIGURATION FILE
103The configuration file has the same syntax as
104.Xr krb5.conf 5 ,
105but will be read before
106.Pa /etc/krb5.conf ,
| 153.Xr krb5.conf 5 ,
154and
155.Xr krb5_openlog 3 .
156The entity used for logging is
157.Nm kdc .
158.Sh CONFIGURATION FILE
159The configuration file has the same syntax as
160.Xr krb5.conf 5 ,
161but will be read before
162.Pa /etc/krb5.conf ,
|
107so it may override settings found there. Options specific to the KDC
108only are found in the
| 163so it may override settings found there.
164Options specific to the KDC only are found in the
|
109.Dq [kdc]
110section.
111All the command-line options can preferably be added in the
| 165.Dq [kdc]
166section.
167All the command-line options can preferably be added in the
|
112configuration file. The only difference is the pre-authentication flag,
113that has to be specified as:
| 168configuration file.
169The only difference is the pre-authentication flag, which has to be
170specified as:
|
114.Pp
115.Dl require-preauth = no
116.Pp
117(in fact you can specify the option as
118.Fl -require-preauth=no ) .
119.Pp
120And there are some configuration options which do not have
121command-line equivalents:
122.Bl -tag -width "xxx" -offset indent
123.It Li check-ticket-addresses = Va boolean
| 171.Pp
172.Dl require-preauth = no
173.Pp
174(in fact you can specify the option as
175.Fl -require-preauth=no ) .
176.Pp
177And there are some configuration options which do not have
178command-line equivalents:
179.Bl -tag -width "xxx" -offset indent
180.It Li check-ticket-addresses = Va boolean
|
124Check the addresses in the ticket when processing TGS requests. The
125default is FALSE.
| 181Check the addresses in the ticket when processing TGS requests.
182The default is FALSE.
|
126.It Li allow-null-ticket-addresses = Va boolean
| 183.It Li allow-null-ticket-addresses = Va boolean
|
127Permit tickets with no addresses. This option is only relevant when
128check-ticket-addresses is TRUE.
| 184Permit tickets with no addresses.
185This option is only relevant when check-ticket-addresses is TRUE.
|
129.It Li allow-anonymous = Va boolean
130Permit anonymous tickets with no addresses.
131.It encode_as_rep_as_tgs_rep = Va boolean
| 186.It Li allow-anonymous = Va boolean
187Permit anonymous tickets with no addresses.
188.It encode_as_rep_as_tgs_rep = Va boolean
|
132Encode AS-Rep as TGS-Rep to be bug-compatible with old DCE code. The
133Heimdal clients allow both.
| 189Encode AS-Rep as TGS-Rep to be bug-compatible with old DCE code.
190The Heimdal clients allow both.
|
134.It kdc_warn_pwexpire = Va time
135How long before password/principal expiration the KDC should start
136sending out warning messages.
137.El
138.Pp
| 191.It kdc_warn_pwexpire = Va time
192How long before password/principal expiration the KDC should start
193sending out warning messages.
194.El
195.Pp
|
| 196The configuration file is only read when the
197.Nm
198is started.
199If changes made to the configuration file are to take effect, the
200.Nm
201needs to be restarted.
202.Pp
|
139An example of a config file:
140.Bd -literal -offset indent
141[kdc]
142 require-preauth = no
143 v4-realm = FOO.SE
144 key-file = /key-file
145.Ed
146.Sh BUGS
147If the machine running the KDC has new addresses added to it, the KDC
| 203An example of a config file:
204.Bd -literal -offset indent
205[kdc]
206 require-preauth = no
207 v4-realm = FOO.SE
208 key-file = /key-file
209.Ed
210.Sh BUGS
211If the machine running the KDC has new addresses added to it, the KDC
|
148will have to be restarted to listen to them. The reason it doesn't
149just listen to wildcarded (like INADDR_ANY) addresses, is that the
150replies has to come from the same address they were sent to, and most
151OS:es doesn't pass this information to the application. If your normal
152mode of operation require that you add and remove addresses, the best
153option is probably to listen to a wildcarded TCP socket, and make sure
154your clients use TCP to connect. For instance, this will listen to
155IPv4 TCP port 88 only:
| 212will have to be restarted to listen to them.
213The reason it doesn't just listen to wildcarded (like INADDR_ANY)
214addresses, is that the replies has to come from the same address they
215were sent to, and most OS:es doesn't pass this information to the
216application.
217If your normal mode of operation require that you add and remove
218addresses, the best option is probably to listen to a wildcarded TCP
219socket, and make sure your clients use TCP to connect.
220For instance, this will listen to IPv4 TCP port 88 only:
|
156.Bd -literal -offset indent
157kdc --addresses=0.0.0.0 --ports="88/tcp"
158.Ed
159.Pp
160There should be a way to specify protocol, port, and address triplets,
161not just addresses and protocol, port tuples.
162.Sh SEE ALSO
163.Xr kinit 1 ,
164.Xr krb5.conf 5
| 221.Bd -literal -offset indent
222kdc --addresses=0.0.0.0 --ports="88/tcp"
223.Ed
224.Pp
225There should be a way to specify protocol, port, and address triplets,
226not just addresses and protocol, port tuples.
227.Sh SEE ALSO
228.Xr kinit 1 ,
229.Xr krb5.conf 5
|