1uux_selinux(8) SELinux Policy uux uux_selinux(8)
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6 uux_selinux - Security Enhanced Linux Policy for the uux processes
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9 Security-Enhanced Linux secures the uux processes via flexible manda‐
10 tory access control.
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12 The uux processes execute with the uux_t SELinux type. You can check if
13 you have these processes running by executing the ps command with the
14 -Z qualifier.
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16 For example:
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18 ps -eZ | grep uux_t
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23 The uux_t SELinux type can be entered via the uux_exec_t file type.
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25 The default entrypoint paths for the uux_t domain are the following:
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27 /usr/bin/uux
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30 SELinux defines process types (domains) for each process running on the
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33 You can see the context of a process using the -Z option to ps
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35 Policy governs the access confined processes have to files. SELinux
36 uux policy is very flexible allowing users to setup their uux processes
37 in as secure a method as possible.
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39 The following process types are defined for uux:
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41 uux_t
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43 Note: semanage permissive -a uux_t can be used to make the process type
44 uux_t permissive. SELinux does not deny access to permissive process
45 types, but the AVC (SELinux denials) messages are still generated.
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49 SELinux policy is customizable based on least access required. uux
50 policy is extremely flexible and has several booleans that allow you to
51 manipulate the policy and run uux with the tightest access possible.
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55 If you want to allow users to resolve user passwd entries directly from
56 ldap rather then using a sssd server, you must turn on the authlo‐
57 gin_nsswitch_use_ldap boolean. Disabled by default.
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59 setsebool -P authlogin_nsswitch_use_ldap 1
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63 If you want to deny any process from ptracing or debugging any other
64 processes, you must turn on the deny_ptrace boolean. Enabled by
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67 setsebool -P deny_ptrace 1
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71 If you want to allow any process to mmap any file on system with
72 attribute file_type, you must turn on the domain_can_mmap_files bool‐
73 ean. Enabled by default.
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75 setsebool -P domain_can_mmap_files 1
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79 If you want to allow all domains write to kmsg_device, while kernel is
80 executed with systemd.log_target=kmsg parameter, you must turn on the
81 domain_can_write_kmsg boolean. Disabled by default.
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83 setsebool -P domain_can_write_kmsg 1
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87 If you want to allow all domains to use other domains file descriptors,
88 you must turn on the domain_fd_use boolean. Enabled by default.
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90 setsebool -P domain_fd_use 1
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94 If you want to allow all domains to have the kernel load modules, you
95 must turn on the domain_kernel_load_modules boolean. Disabled by
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98 setsebool -P domain_kernel_load_modules 1
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102 If you want to allow all domains to execute in fips_mode, you must turn
103 on the fips_mode boolean. Enabled by default.
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105 setsebool -P fips_mode 1
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109 If you want to enable reading of urandom for all domains, you must turn
110 on the global_ssp boolean. Disabled by default.
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112 setsebool -P global_ssp 1
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116 If you want to allow confined applications to run with kerberos, you
117 must turn on the kerberos_enabled boolean. Enabled by default.
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119 setsebool -P kerberos_enabled 1
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123 If you want to allow system to run with NIS, you must turn on the
124 nis_enabled boolean. Disabled by default.
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126 setsebool -P nis_enabled 1
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130 If you want to allow confined applications to use nscd shared memory,
131 you must turn on the nscd_use_shm boolean. Disabled by default.
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133 setsebool -P nscd_use_shm 1
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138 The SELinux process type uux_t can manage files labeled with the fol‐
139 lowing file types. The paths listed are the default paths for these
140 file types. Note the processes UID still need to have DAC permissions.
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142 anon_inodefs_t
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145 uucpd_spool_t
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147 /var/spool/uucp(/.*)?
148 /var/spool/uucppublic(/.*)?
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152 SELinux requires files to have an extended attribute to define the file
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155 You can see the context of a file using the -Z option to ls
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157 Policy governs the access confined processes have to these files.
158 SELinux uux policy is very flexible allowing users to setup their uux
159 processes in as secure a method as possible.
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161 The following file types are defined for uux:
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165 uux_exec_t
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167 - Set files with the uux_exec_t type, if you want to transition an exe‐
168 cutable to the uux_t domain.
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172 Note: File context can be temporarily modified with the chcon command.
173 If you want to permanently change the file context you need to use the
174 semanage fcontext command. This will modify the SELinux labeling data‐
175 base. You will need to use restorecon to apply the labels.
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179 semanage fcontext can also be used to manipulate default file context
180 mappings.
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182 semanage permissive can also be used to manipulate whether or not a
183 process type is permissive.
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185 semanage module can also be used to enable/disable/install/remove pol‐
186 icy modules.
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188 semanage boolean can also be used to manipulate the booleans
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191 system-config-selinux is a GUI tool available to customize SELinux pol‐
192 icy settings.
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196 This manual page was auto-generated using sepolicy manpage .
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200 selinux(8), uux(8), semanage(8), restorecon(8), chcon(1), sepolicy(8) ,
201 setsebool(8)
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205uux 19-04-25 uux_selinux(8)