| 1 | .\" Title: idmap_rid
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| 2 | .\" Author: [see the "AUTHOR" section]
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| 3 | .\" Generator: DocBook XSL Stylesheets v1.74.0 <http://docbook.sf.net/>
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| 4 | .\" Date: 06/18/2010
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| 5 | .\" Manual: System Administration tools
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| 6 | .\" Source: Samba 3.5
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| 7 | .\" Language: English
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| 8 | .\"
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| 9 | .TH "IDMAP_RID" "8" "06/18/2010" "Samba 3\&.5" "System Administration tools"
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| 158 | ..
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| 159 | .\" -----------------------------------------------------------------
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| 160 | .\" * set default formatting
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| 165 | .ad l
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| 166 | .\" -----------------------------------------------------------------
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| 167 | .\" * MAIN CONTENT STARTS HERE *
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| 168 | .\" -----------------------------------------------------------------
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| 169 | .SH "Name"
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| 170 | idmap_rid \- Samba\'s idmap_rid Backend for Winbind
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| 171 | .SH "DESCRIPTION"
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| 172 | .PP
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| 173 | The idmap_rid backend provides a way to use an algorithmic mapping scheme to map UIDs/GIDs and SIDs\&. No database is required in this case as the mapping is deterministic\&.
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| 174 | .SH "IDMAP OPTIONS"
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| 175 | .PP
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| 176 | range = low \- high
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| 177 | .RS 4
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| 178 | Defines the available matching uid and gid range for which the backend is authoritative\&. Note that the range acts as a filter\&. If algorithmically determined UID or GID fall outside the range, they are ignored and the corresponding map is discarded\&. It is intended as a way to avoid accidental UID/GID overlaps between local and remotely defined IDs\&.
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| 179 | .RE
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| 180 | .PP
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| 181 | base_rid = INTEGER
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| 182 | .RS 4
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| 183 | Defines the base integer used to build SIDs out of a UID or a GID, and to rebase the UID or GID to be obtained from a SID\&. This means SIDs with a RID less than the base rid are filtered\&. The default is not to restrict the allowed rids at all, i\&.e\&. a base_rid value of 0\&. A good value for the base_rid can be 1000, since user RIDs by default start at 1000 (512 hexadecimal)\&.
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| 184 | .sp
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| 185 | Use of this parameter is deprecated\&.
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| 186 | .RE
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| 187 | .SH "THE MAPPING FORMULAS"
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| 188 | .PP
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| 189 | The Unix ID for a RID is calculated this way:
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| 190 | .sp
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| 201 | .sp -1
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| 202 |
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| 203 | ID = RID \- BASE_RID + LOW_RANGE_ID\&.
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| 204 |
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| 215 | .PP
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| 216 | Correspondingly, the formula for calculating the RID for a given Unix ID is this:
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| 217 | .sp
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| 227 | .BB lightgray adjust-for-leading-newline
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| 228 | .sp -1
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| 229 |
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| 230 | RID = ID + BASE_RID \- LOW_RANGE_ID\&.
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| 231 |
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| 241 | .\}
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| 242 | .sp
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| 243 | .SH "EXAMPLES"
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| 244 | .PP
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| 245 | This example shows how to configure two domains with idmap_rid, the principal domain and a trusted domain, leaving the default id mapping scheme at tdb\&. The example also demonstrates the use of the base_rid parameter for the trusted domain\&.
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| 246 | .sp
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| 256 | .BB lightgray adjust-for-leading-newline
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| 257 | .sp -1
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| 258 |
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| 259 | [global]
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| 260 | security = domain
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| 261 | workgroup = MAIN
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| 262 |
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| 263 | idmap backend = tdb
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| 264 | idmap uid = 1000000\-1999999
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| 265 | idmap gid = 1000000\-1999999
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| 266 |
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| 267 | idmap config MAIN : backend = rid
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| 268 | idmap config MAIN : range = 10000 \- 49999
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| 269 |
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| 270 | idmap config TRUSTED : backend = rid
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| 271 | idmap config TRUSTED : range = 50000 \- 99999
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| 272 | idmap config TRUSTED : base_rid = 1000
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| 273 |
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| 282 | .RE
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| 283 | .\}
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| 284 | .SH "AUTHOR"
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| 285 | .PP
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| 286 | The original Samba software and related utilities were created by Andrew Tridgell\&. Samba is now developed by the Samba Team as an Open Source project similar to the way the Linux kernel is developed\&.
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