1sshd_net_selinux(8) SELinux Policy sshd_net sshd_net_selinux(8)
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6 sshd_net_selinux - Security Enhanced Linux Policy for the sshd_net pro‐
7 cesses
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10 Security-Enhanced Linux secures the sshd_net processes via flexible
11 mandatory access control.
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13 The sshd_net processes execute with the sshd_net_t SELinux type. You
14 can check if you have these processes running by executing the ps com‐
15 mand with the -Z qualifier.
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17 For example:
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19 ps -eZ | grep sshd_net_t
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24 SELinux defines process types (domains) for each process running on the
25 system
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27 You can see the context of a process using the -Z option to ps
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29 Policy governs the access confined processes have to files. SELinux
30 sshd_net policy is very flexible allowing users to setup their sshd_net
31 processes in as secure a method as possible.
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33 The following process types are defined for sshd_net:
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35 sshd_net_t
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37 Note: semanage permissive -a sshd_net_t can be used to make the process
38 type sshd_net_t permissive. SELinux does not deny access to permissive
39 process types, but the AVC (SELinux denials) messages are still gener‐
40 ated.
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44 SELinux policy is customizable based on least access required.
45 sshd_net policy is extremely flexible and has several booleans that
46 allow you to manipulate the policy and run sshd_net with the tightest
47 access possible.
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51 If you want to deny any process from ptracing or debugging any other
52 processes, you must turn on the deny_ptrace boolean. Enabled by
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55 setsebool -P deny_ptrace 1
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59 If you want to allow any process to mmap any file on system with
60 attribute file_type, you must turn on the domain_can_mmap_files bool‐
61 ean. Enabled by default.
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63 setsebool -P domain_can_mmap_files 1
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67 If you want to allow all domains write to kmsg_device, while kernel is
68 executed with systemd.log_target=kmsg parameter, you must turn on the
69 domain_can_write_kmsg boolean. Disabled by default.
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71 setsebool -P domain_can_write_kmsg 1
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75 If you want to allow all domains to use other domains file descriptors,
76 you must turn on the domain_fd_use boolean. Enabled by default.
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78 setsebool -P domain_fd_use 1
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82 If you want to allow all domains to have the kernel load modules, you
83 must turn on the domain_kernel_load_modules boolean. Disabled by
84 default.
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86 setsebool -P domain_kernel_load_modules 1
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90 If you want to allow all domains to execute in fips_mode, you must turn
91 on the fips_mode boolean. Enabled by default.
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93 setsebool -P fips_mode 1
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97 If you want to enable reading of urandom for all domains, you must turn
98 on the global_ssp boolean. Disabled by default.
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100 setsebool -P global_ssp 1
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105 semanage fcontext can also be used to manipulate default file context
106 mappings.
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108 semanage permissive can also be used to manipulate whether or not a
109 process type is permissive.
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111 semanage module can also be used to enable/disable/install/remove pol‐
112 icy modules.
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114 semanage boolean can also be used to manipulate the booleans
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117 system-config-selinux is a GUI tool available to customize SELinux pol‐
118 icy settings.
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122 This manual page was auto-generated using sepolicy manpage .
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126 selinux(8), sshd_net(8), semanage(8), restorecon(8), chcon(1), sepol‐
127 icy(8) , setsebool(8)
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131sshd_net 19-04-25 sshd_net_selinux(8)