1GSSPROXY.CONF(5) GssProxy Manual pages GSSPROXY.CONF(5)
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6 gssproxy.conf - GssProxy Daemon Configuration file
7
9 Optional configuration directives for the gssproxy daemon.
10 GSS-Proxy conf files are classic ini-style configuration files. Each
12 option consist of a key = value pair. Any characters behind '#' will be
13 treated as comments and will be ignored. Boolean parameters accept "1",
14 "true", "yes" and "on" as positive values. All other values will be
15 considered as negative values.
16 GSS-Proxy conf files must either be named "gssproxy.conf", or be of the
18 form "##-foo.conf" (that is, start with two numbers followed by a dash,
19 and end in ".conf"). Files not conforming to this will be ignored
20 unless specifically requested through command line parameters. Within a
21 single file, any duplicate values or sections will be merged. Across
22 multiple files, duplicates will generate a warning, and the first value
23 encountered will take precedence (i.e., there is no merging).
24
26 A section in a GSS-Proxy conf file is identified by the sectionname in
27 square brackets ([sectionname]).
28 There is one special section for global gssproxy settings, called
30 [gssproxy].
31 Services such as nfs, apache, ssh, etc. are represented by sections
33 like [service/nfs], [service/apache], etc. and are identified by the
34 "euid" setting (see below).
35
37 String parameters may contain substitution patterns. This allows
38 gssproxy to deal with patterns for the storage location of keytabs or
39 credential caches easier.
40 The supported patterns are:
42 %U
44 substitutes to the user's numeric uid (e.g. 123)
45 %u
47 substitutes to the user's username (e.g. john).
48
50 gssproxy supports the following options:
51 allow_any_uid (boolean)
53 Allow any process of any user to use this service.
54 Note that absent a custom socket option this option may cause a
56 service definition to mask access to following services. To avoid
57 issues change the order of services in your configuation file so
58 that services with allow_any_uid enabled are listed last, or define
59 a custom socket for other services.
60 Default: false
62 allow_protocol_transition (boolean)
64 Allow clients to request a ticket to self for an arbitrary user.
65 This option controls whether s4u2self requests are allowed for the
67 requesting client. The configured keytab is used as the service
68 identity for which a ticket is requested. The KDC still needs to
69 allow the operation for it to succeed.
70 Default: false
72 allow_constrained_delegation (boolean)
74 Allow clients to request a ticket to another service using an
75 evidence ticket.
76 This option controls whether s4u2proxy requests are allowed for the
78 requesting client. The KDC still needs to allow the operation for
79 it to succeed.
80 Default: false
82 allow_client_ccache_sync (boolean)
84 Allow clients to request credentials to be sent back for better
85 caching.
86 This option allows the proxy, in certain circumstances, to send
88 back an additional option in the response structure of certain
89 calls when it determines that a new ticket may have been added to
90 the internal ccache. Clients can then replace their (encrypted)
91 copy with the updated ccache.
92 Default: false
94 cred_store (string)
96 This parameter allows to control in which way gssproxy should use
97 the cred_store interface provided by GSSAPI. The parameter can be
98 defined multiple times per service.
99 The syntax of the cred_store parameter is as follows: cred_store =
101 <cred_store_option>:<cred_store_value>
102 Currently this interface supports the following options:
104 keytab
106 Defines the keytab the service should use. Example: cred_store
107 = keytab:/path/to/keytab
108 client_keytab
110 Defines a client keytab the service should use. Example:
111 cred_store = client_keytab:/path/to/client_keytab.
112 ccache
114 Defines a credential cache the service should use. Example:
115 cred_store = ccache:/path/to/ccache.
116 Notably the client_keytab and the ccache setting typically are used
118 with variable substitution placeholders (see above). For example:
119 cred_store = keytab:/etc/krb5.keytab
121 cred_store = ccache:FILE:/var/lib/gssproxy/krb5cc_%U
122 cred_store = client_keytab:/var/lib/gssproxy/%U.keytab
123 Default: cred_store =
125 cred_usage (string)
127 Allow to restrict the kind of operations permitted for this
128 service.
129 The allowed options are: initiate, accept, both
131 Default: cred_usage = both
133 debug (boolean)
135 Enable debugging to syslog. Setting to true is identical to setting
136 debug_level to 1.
137 Default: debug = false
139 debug_level (integer)
141 Detail level at which to log debugging messages. 0 corresponds to
142 no logging, while 1 turns on basic debug logging. Level 2 increases
143 verbosity, including more detailed credential verification.
144 At level 3 and above, KRB5_TRACE output is logged. If KRB5_TRACE
146 was already set in the execution environment, trace output is sent
147 to its value instead.
148 Default: 1 if debug is true, otherwise 0
150 enforce_flags (string)
152 A list of GSS Request Flags that are added unconditionally to every
153 context initialization call. Flags can only be added to the list or
154 removed from the list by prepending a +/- sign to the flag name or
155 value.
156 Recognized flag names: DELEGATE, MUTUAL_AUTH, REPLAY_DETECT,
158 SEQUENCE, CONFIDENTIALITY, INTEGRITY, ANONYMOUS
159 Examples:
161 enforce_flags = +REPLAY_DETECT
163 enforce_flags = -0x0001
164 Default: enforce_flags =
166 euid (integer or string)
168 Either the numeric (e.g., 48) or symbolic (e.g., apache) effective
169 uid of a running process, required to identify a service.
170 The "euid" parameter is imperative, any section without it will be
172 discarded.
173 Default: euid =
175 filter_flags (string)
177 A list of GSS Request Flags that are filtered unconditionally from
178 every context initialization call. Flags can only be added to the
179 list or removed from the list by prepending a +/- sign to the flag
180 name or value.
181 NOTE: Because often gssproxy is used to withold access to
183 credentials the Delegate Flag is filtered by default. To allow a
184 service to delegate credentials use the first example below.
185 Recognized flag names: DELEGATE, MUTUAL_AUTH, REPLAY_DETECT,
187 SEQUENCE, CONFIDENTIALITY, INTEGRITY, ANONYMOUS
188 Examples:
190 filter_flags = -DELEGATE
192 filter_flags = -0x0001 +ANONYMOUS
193 Default: filter_flags = +DELEGATE
195 impersonate (boolean)
197 Use impersonation (s4u2self + s4u2proxy) to obtain credentials
198 Default: impersonate = false
200 kernel_nfsd (boolean)
202 Boolean flag that allows the Linux kernel to check if gssproxy is
203 running (via /proc/net/rpc/use-gss-proxy).
204 Default: kernel_nfsd = false
206 krb5_principal (string)
208 The krb5 principal to be used preferred for this service, if one
209 isn't requested by the application. Note that this does not enforce
210 use of this specific name; it only sets a default.
211 Default: krb5_principal =
213 mechs (string)
215 Currently only krb5 is supported.
216 The "mechs" parameter is imperative, any section without it will be
218 discarded.
219 Default: mechs =
221 program (string)
223 If specified, this service will only match when the program being
224 run is the specified string.
225 Programs are assumed to be specified as canonical paths (i.e., no
227 relative paths, no symlinks). Additionally, the '|' character is
228 reserved for future use and therefore forbidden.
229 run_as_user (string)
231 The name of the user gssproxy will drop privileges to.
232 This option is only available in the global section.
234 Default: run_as_user =
236 selinux_context (string)
238 This option is deprecated. Use a custom socket or euid instead.
239 socket (string)
241 This parameter allows to create a per-service socket file over
242 which gssproxy client and server components communicate.
243 When this parameter is not set, gssproxy will use a compiled-in
245 default.
246 syslog_status (boolean)
248 Enable per-call debugging output to the syslog. This may be useful
249 for investigating problems in applications using gssproxy.
250 Default: syslog_status = false
252 trusted (boolean)
254 Defines whether this service is considered trusted. Use with
255 caution, this enables impersonation.
256 Default: trusted = false
258 worker threads (integer)
260 Defines the amount of worker threads gssproxy will create at
261 startup.
262 Default: worker threads =
264
266 gssproxy(8) and gssproxy-mech(8).
267
269 GSS-Proxy - http://fedorahosted.org/gss-proxy
270GSS Proxy 01/26/2021 GSSPROXY.CONF(5)