#SETUP ZABBIX AGENT LINUX FREE#
Feel free to check the official Zabbix documentation if you need more information about Zabbix agent configuration parameters. Keep in mind that in this tutorial I will use a Zabbix server with IP address 192.168.5.43 to monitor a Linux server called l01mylab that has IP address 192.168.5.114 – don’t forget to change those settings to match your environment. Is a GUI tool available to customize SELinux policy settings.Step 2: Configure Zabbix agent on Linux OS You will need to useĬan also be used to manipulate default file context mappings.Ĭan also be used to manipulate whether or not a process type is permissive.Ĭan also be used to enable/disable/install/remove policy modules.Ĭan also be used to manipulate the port definitionsĬan also be used to manipulate the booleans This will modify the SELinux labeling database. If you want to permanently change the file context you need to use theĬommand. Note: File context can be temporarily modified with the chcon command.
Set files with the zabbix_agent_initrc_exec_t type, if you want to transition an executable to the zabbix_agent_initrc_t domain. Set files with the zabbix_agent_exec_t type, if you want to transition an executable to the zabbix_agent_t domain. The following file types are defined for zabbix_agent: Policy governs the access confined processes have to these files. You can see the context of a file using the -Z option to lsP SELinux requires files to have an extended attribute to define the file type. Note the processes UID still need to have DAC permissions. The paths listed are the default paths for these file types. The SELinux process type zabbix_agent_t can manage files labeled with the following file types. The following port types are defined for zabbix_agent: Policy governs the access confined processes have to these ports. You can see the types associated with a port by using the following command: SELinux defines port types to represent TCP and UDP ports. If you want to allow confined applications to use nscd shared memory, you must turn on the nscd_use_shm boolean. If you want to allow system to run with NIS, you must turn on the nis_enabled boolean. If you want to allow confined applications to run with kerberos, you must turn on the kerberos_enabled boolean. If you want to enable reading of urandom for all domains, you must turn on the global_ssp boolean. If you want to allow all domains to execute in fips_mode, you must turn on the fips_mode boolean. Setsebool -P domain_kernel_load_modules 1 If you want to allow all domains to have the kernel load modules, you must turn on the domain_kernel_load_modules boolean. If you want to allow all domains to use other domains file descriptors, you must turn on the domain_fd_use boolean. If you want to deny any process from ptracing or debugging any other processes, you must turn on the deny_ptrace boolean. If you want to allow all daemons the ability to read/write terminals, you must turn on the daemons_use_tty boolean. If you want to allow all daemons to use tcp wrappers, you must turn on the daemons_use_tcp_wrapper boolean. Setsebool -P daemons_enable_cluster_mode 1 If you want to enable cluster mode for daemons, you must turn on the daemons_enable_cluster_mode boolean. If you want to allow all daemons to write corefiles to /, you must turn on the daemons_dump_core boolean. Setsebool -P authlogin_nsswitch_use_ldap 1 If you want to allow users to resolve user passwd entries directly from ldap rather then using a sssd server, you must turn on the authlogin_nsswitch_use_ldap boolean. zabbix_agent policy is extremely flexible and has several booleans that allow you to manipulate the policy and run zabbix_agent with the tightest access possible. SELinux policy is customizable based on least access required. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. The following process types are defined for zabbix_agent:Ĭan be used to make the process type zabbix_agent_t permissive. SELinux zabbix_agent policy is very flexible allowing users to setup their zabbix_agent processes in as secure a method as possible. Policy governs the access confined processes have to files.
#SETUP ZABBIX AGENT LINUX PSP#
You can see the context of a process using the -Z option to psP SELinux defines process types (domains) for each process running on the system usr/bin/zabbix_agentd, /usr/sbin/zabbix_agentd The default entrypoint paths for the zabbix_agent_t domain are the following:
The zabbix_agent_t SELinux type can be entered via the zabbix_agent_exec_t file type. You can check if you have these processes running by executing the ps command with the -Z qualifier. The zabbix_agent processes execute with the zabbix_agent_t SELinux type.