fail2ban/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 rw_inherited_file_perms;
')

########################################
## <summary>
##	Read and write to an fail2ba unix stream socket.
## </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>
##  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 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)
	read_files_pattern($1, fail2ban_var_lib_t, fail2ban_var_lib_t)
')

########################################
## <summary>
##	Allow the specified domain to read fail2ban's 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:dir list_dir_perms;
	allow $1 fail2ban_log_t:file read_file_perms;
')

########################################
## <summary>
##	Allow the specified domain to 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:dir list_dir_perms;
	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>
##	dontaudit read and write an leaked file descriptors
## </summary>
## <param name="domain">
##	<summary>
##	Domain to not audit.
##	</summary>
## </param>
#
interface(`fail2ban_dontaudit_leaks',`
	gen_require(`
		type fail2ban_t;
	')

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

########################################
## <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>
##	The role to be allowed to manage the fail2ban domain.
##	</summary>
## </param>
## <rolecap/>
#
interface(`fail2ban_admin',`
	gen_require(`
		type fail2ban_t, fail2ban_log_t, fail2ban_initrc_exec_t;
		type fail2ban_var_run_t, fail2ban_var_lib_t, fail2ban_tmp_t;
		type fail2ban_client_t;
	')

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

	tunable_policy(`deny_ptrace',`',`
		allow $1 { fail2ban_t fail2ban_client_t }:process ptrace;
	')

	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_list_var_lib($1)
	admin_pattern($1, fail2ban_var_lib_t)

	files_list_tmp($1)
	admin_pattern($1, fail2ban_tmp_t)

	fail2ban_run_client($1, $2)
')