selinux-policy/policy/modules/services/denyhosts.if

## <summary>DenyHosts SSH dictionary attack mitigation</summary>
## <desc>
##	<p>
##	DenyHosts is a script intended to be run by Linux
##	system administrators to help thwart SSH server attacks
##	(also known as dictionary based attacks and brute force
##	attacks).
##	</p>
## </desc>

########################################
## <summary>
##	Execute a domain transition to run denyhosts.
## </summary>
## <param name="domain">
## <summary>
##	Domain allowed to transition.
## </summary>
## </param>
#
interface(`denyhosts_domtrans', `
	gen_require(`
		type denyhosts_t, denyhosts_exec_t;
	')

	domtrans_pattern($1, denyhosts_exec_t, denyhosts_t)
')

########################################
## <summary>
##	Execute denyhost server in the denyhost domain.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed to transition.
##	</summary>
## </param>
#
interface(`denyhosts_initrc_domtrans', `
	gen_require(`
		type denyhosts_initrc_exec_t;
	')

	init_labeled_script_domtrans($1, denyhosts_initrc_exec_t)
')

########################################
## <summary>
##	All of the rules required to administrate
##	an denyhosts environment.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
## <param name="role">
##	<summary>
##	Role allowed access.
##	</summary>
## </param>
## <rolecap/>
#
interface(`denyhosts_admin', `
	gen_require(`
		type denyhosts_t, denyhosts_var_lib_t, denyhosts_var_lock_t;
		type denyhosts_var_log_t, denyhosts_initrc_exec_t;
	')

	allow $1 denyhosts_t:process { ptrace signal_perms };
	ps_process_pattern($1, denyhosts_t)

	denyhosts_initrc_domtrans($1)
	domain_system_change_exemption($1)
	role_transition $2 denyhosts_initrc_exec_t system_r;
	allow $2 system_r;

	files_search_var_lib($1)
	admin_pattern($1, denyhosts_var_lib_t)

	logging_search_logs($1)
	admin_pattern($1, denyhosts_var_log_t)

	files_search_locks($1)
	admin_pattern($1, denyhosts_var_lock_t)
')