noun (n)

• someone who controls access to something

  seseorang yang kawalan akses untuk sesuatu

  Example:
  There are too many gatekeepers between the field officers and the chief.
  

  source: wordnet30
• someone who guards an entrance

  seseorang yang penjaga pintu masuk

  Synonym:
  door guard, doorkeeper, doorman, hall porter, ostiary, porter
  

  source: wordnet30