This post describes about how to list out Apache modules and security modules on Linux operating system. The following apache modules are common secure web server mod_security and  mod_evasive.

mod_security 
mod_evasive

List out apache modules,

Ubuntu : 

#  apache2ctl -M

CentOS / Fedora / RHEL
 
# apachectl -t -D DUMP_MODULES

or
 
# httpd -t -D DUMP_MODULES


Loaded Modules:

 core_module (static)

 authn_file_module (static)

 authn_core_module (static)

 authz_host_module (static)

 authz_groupfile_module (static)

 authz_user_module (static)

 authz_core_module (static)

 access_compat_module (static)

 auth_basic_module (static)

 socache_shmcb_module (static)

 socache_dbm_module (static)

 so_module (static)

 include_module (static)

 filter_module (static)

 deflate_module (static)

 http_module (static)

 mime_module (static)

 log_config_module (static)

 logio_module (static)

 expires_module (static)

 headers_module (static)

 unique_id_module (static)

 setenvif_module (static)

 proxy_module (static)

 proxy_connect_module (static)

 proxy_http_module (static)

 slotmem_shm_module (static)

 ssl_module (static)

 mpm_prefork_module (static)

 unixd_module (static)

 status_module (static)

 autoindex_module (static)

 info_module (static)

 suexec_module (static)

 cgi_module (static)

 negotiation_module (static)

 dir_module (static)

 actions_module (static)

 userdir_module (static)

 alias_module (static)

 rewrite_module (static)

 jk_module (shared)

 bwlimited_module (shared)

 suphp_module (shared)

 security2_module (shared)