gdnet@server:~$ proftpd -l
Compiled-in modules:
  mod_core.c
  mod_xfer.c
  mod_auth_unix.c
  mod_auth_file.c
  mod_auth.c
  mod_ls.c
  mod_log.c
  mod_site.c
  mod_delay.c
  mod_dso.c
  mod_auth_pam.c
  mod_readme.c
  mod_cap.c
  mod_ctrls.c