1ssh_keysign_selinux(8) SELinux Policy ssh_keysign ssh_keysign_selinux(8)
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6 ssh_keysign_selinux - Security Enhanced Linux Policy for the
7 ssh_keysign processes
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10 Security-Enhanced Linux secures the ssh_keysign processes via flexible
11 mandatory access control.
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13 The ssh_keysign processes execute with the ssh_keysign_t SELinux type.
14 You can check if you have these processes running by executing the ps
15 command with the -Z qualifier.
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17 For example:
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19 ps -eZ | grep ssh_keysign_t
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24 The ssh_keysign_t SELinux type can be entered via the
25 ssh_keysign_exec_t file type.
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27 The default entrypoint paths for the ssh_keysign_t domain are the fol‐
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30 /usr/lib/openssh/ssh-keysign, /usr/libexec/openssh/ssh-keysign
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33 SELinux defines process types (domains) for each process running on the
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36 You can see the context of a process using the -Z option to ps
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38 Policy governs the access confined processes have to files. SELinux
39 ssh_keysign policy is very flexible allowing users to setup their
40 ssh_keysign processes in as secure a method as possible.
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42 The following process types are defined for ssh_keysign:
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44 ssh_keysign_t
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46 Note: semanage permissive -a ssh_keysign_t can be used to make the
47 process type ssh_keysign_t permissive. SELinux does not deny access to
48 permissive process types, but the AVC (SELinux denials) messages are
49 still generated.
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53 SELinux policy is customizable based on least access required.
54 ssh_keysign policy is extremely flexible and has several booleans that
55 allow you to manipulate the policy and run ssh_keysign with the tight‐
56 est access possible.
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60 If you want to allow host key based authentication, you must turn on
61 the ssh_keysign boolean. Disabled by default.
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63 setsebool -P ssh_keysign 1
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67 If you want to deny any process from ptracing or debugging any other
68 processes, you must turn on the deny_ptrace boolean. Enabled by
69 default.
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71 setsebool -P deny_ptrace 1
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75 If you want to allow any process to mmap any file on system with
76 attribute file_type, you must turn on the domain_can_mmap_files bool‐
77 ean. Enabled by default.
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79 setsebool -P domain_can_mmap_files 1
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83 If you want to allow all domains write to kmsg_device, while kernel is
84 executed with systemd.log_target=kmsg parameter, you must turn on the
85 domain_can_write_kmsg boolean. Disabled by default.
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87 setsebool -P domain_can_write_kmsg 1
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91 If you want to allow all domains to use other domains file descriptors,
92 you must turn on the domain_fd_use boolean. Enabled by default.
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94 setsebool -P domain_fd_use 1
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98 If you want to allow all domains to have the kernel load modules, you
99 must turn on the domain_kernel_load_modules boolean. Disabled by
100 default.
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102 setsebool -P domain_kernel_load_modules 1
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106 If you want to allow all domains to execute in fips_mode, you must turn
107 on the fips_mode boolean. Enabled by default.
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109 setsebool -P fips_mode 1
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113 If you want to enable reading of urandom for all domains, you must turn
114 on the global_ssp boolean. Disabled by default.
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116 setsebool -P global_ssp 1
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120 If you want to allow confined applications to use nscd shared memory,
121 you must turn on the nscd_use_shm boolean. Disabled by default.
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123 setsebool -P nscd_use_shm 1
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128 SELinux requires files to have an extended attribute to define the file
129 type.
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131 You can see the context of a file using the -Z option to ls
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133 Policy governs the access confined processes have to these files.
134 SELinux ssh_keysign policy is very flexible allowing users to setup
135 their ssh_keysign processes in as secure a method as possible.
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137 The following file types are defined for ssh_keysign:
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141 ssh_keysign_exec_t
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143 - Set files with the ssh_keysign_exec_t type, if you want to transition
144 an executable to the ssh_keysign_t domain.
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147 Paths:
148 /usr/lib/openssh/ssh-keysign, /usr/libexec/openssh/ssh-keysign
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151 Note: File context can be temporarily modified with the chcon command.
152 If you want to permanently change the file context you need to use the
153 semanage fcontext command. This will modify the SELinux labeling data‐
154 base. You will need to use restorecon to apply the labels.
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158 semanage fcontext can also be used to manipulate default file context
159 mappings.
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161 semanage permissive can also be used to manipulate whether or not a
162 process type is permissive.
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164 semanage module can also be used to enable/disable/install/remove pol‐
165 icy modules.
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167 semanage boolean can also be used to manipulate the booleans
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170 system-config-selinux is a GUI tool available to customize SELinux pol‐
171 icy settings.
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175 This manual page was auto-generated using sepolicy manpage .
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179 selinux(8), ssh_keysign(8), semanage(8), restorecon(8), chcon(1),
180 sepolicy(8) , setsebool(8)
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184ssh_keysign 19-04-25 ssh_keysign_selinux(8)