debian-selinux-policies/policy/modules/fail2ban.if

## <summary>Update firewall filtering to ban IP addresses with too many password failures.</summary>

########################################
## <summary>
##	Execute a domain transition to run fail2ban.
## </summary>
## <param name="domain">
## <summary>
##	Domain allowed to transition.
## </summary>
## </param>
#
interface(`fail2ban_domtrans',`
	gen_require(`
		type fail2ban_t, fail2ban_exec_t;
	')

	corecmd_search_bin($1)
	domtrans_pattern($1, fail2ban_exec_t, fail2ban_t)
')

########################################
## <summary>
##	Execute the fail2ban client in
##	the fail2ban client domain.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed to transition.
##	</summary>
## </param>
#
interface(`fail2ban_domtrans_client',`
	gen_require(`
		type fail2ban_client_t, fail2ban_client_exec_t;
	')

	corecmd_search_bin($1)
	domtrans_pattern($1, fail2ban_client_exec_t, fail2ban_client_t)
')

########################################
## <summary>
##	Execute fail2ban client in the
##	fail2ban client domain, and allow
##	the specified role the fail2ban
##	client domain.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed to transition.
##	</summary>
## </param>
## <param name="role">
##	<summary>
##	Role allowed access.
##	</summary>
## </param>
#
interface(`fail2ban_run_client',`
	gen_require(`
		attribute_role fail2ban_client_roles;
	')

	fail2ban_domtrans_client($1)
	roleattribute $2 fail2ban_client_roles;
')

#####################################
## <summary>
##	Connect to fail2ban over a
##	unix domain stream socket.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
#
interface(`fail2ban_stream_connect',`
	gen_require(`
		type fail2ban_t, fail2ban_var_run_t;
	')

	files_search_pids($1)
	stream_connect_pattern($1, fail2ban_var_run_t, fail2ban_var_run_t, fail2ban_t)
')

########################################
## <summary>
##	Read and write inherited temporary files.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
#
interface(`fail2ban_rw_inherited_tmp_files',`
	gen_require(`
		type fail2ban_tmp_t;
	')

	files_search_tmp($1)
	allow $1 fail2ban_tmp_t:file { read write };
')

########################################
## <summary>
##	Do not audit attempts to use
##	fail2ban file descriptors.
## </summary>
## <param name="domain">
##	<summary>
##	Domain to not audit.
##	</summary>
## </param>
#
interface(`fail2ban_dontaudit_use_fds',`
	gen_require(`
		type fail2ban_t;
	')

	dontaudit $1 fail2ban_t:fd use;
')

########################################
## <summary>
##	Do not audit attempts to read and
##	write fail2ban unix stream sockets
## </summary>
## <param name="domain">
##	<summary>
##	Domain to not audit.
##	</summary>
## </param>
#
interface(`fail2ban_dontaudit_rw_stream_sockets',`
	gen_require(`
		type fail2ban_t;
	')

	dontaudit $1 fail2ban_t:unix_stream_socket { read write };
')

########################################
## <summary>
##	Read and write fail2ban unix
##	stream sockets.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
#
interface(`fail2ban_rw_stream_sockets',`
	gen_require(`
		type fail2ban_t;
	')

	allow $1 fail2ban_t:unix_stream_socket rw_stream_socket_perms;
')

########################################
## <summary>
##	Read fail2ban lib files.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
#
interface(`fail2ban_read_lib_files',`
	gen_require(`
		type fail2ban_var_lib_t;
	')

	files_search_var_lib($1)
	allow $1 fail2ban_var_lib_t:file read_file_perms;
')

########################################
## <summary>
##	Read fail2ban log files.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
## <rolecap/>
#
interface(`fail2ban_read_log',`
	gen_require(`
		type fail2ban_log_t;
	')

	logging_search_logs($1)
	allow $1 fail2ban_log_t:file read_file_perms;
')

########################################
## <summary>
##	Append fail2ban log files.
## </summary>
## <param name="domain">
## 	<summary>
##	Domain allowed access.
## 	</summary>
## </param>
#
interface(`fail2ban_append_log',`
	gen_require(`
		type fail2ban_log_t;
	')

	logging_search_logs($1)
	allow $1 fail2ban_log_t:file append_file_perms;
')

########################################
## <summary>
##	Read fail2ban pid files.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
#
interface(`fail2ban_read_pid_files',`
	gen_require(`
		type fail2ban_var_run_t;
	')

	files_search_pids($1)
	allow $1 fail2ban_var_run_t:file read_file_perms;
')

########################################
## <summary>
##	All of the rules required to
##	administrate an fail2ban environment.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
## <param name="role">
##	<summary>
##	Role allowed access.
##	</summary>
## </param>
## <rolecap/>
#
interface(`fail2ban_admin',`
	gen_require(`
		type fail2ban_t, fail2ban_log_t, fail2ban_tmp_t;
		type fail2ban_var_run_t, fail2ban_initrc_exec_t;
		type fail2ban_var_lib_t, fail2ban_client_t;
	')

	allow $1 { fail2ban_t fail2ban_client_t }:process { ptrace signal_perms };
	ps_process_pattern($1, { fail2ban_t fail2ban_client_t })

	init_labeled_script_domtrans($1, fail2ban_initrc_exec_t)
	domain_system_change_exemption($1)
	role_transition $2 fail2ban_initrc_exec_t system_r;
	allow $2 system_r;

	logging_list_logs($1)
	admin_pattern($1, fail2ban_log_t)

	files_list_pids($1)
	admin_pattern($1, fail2ban_var_run_t)

	files_search_var_lib($1)
	admin_pattern($1, fail2ban_var_lib_t)

	files_search_tmp($1)
	admin_pattern($1, fail2ban_tmp_t)

	fail2ban_run_client($1, $2)
')