DOORKEEPER. Public buildings, temples, and walled cities had special officers to keep the doors; see Ps.84.10: “I would rather be a doorkeeper,” and John.18.17: “The girl at the door.” Many English versions use the word “porter” as in 2Sam.18.26 (niv “gatekeeper”).

International Standard Bible Encyclopedia (1915)

In Ps 84:10, "I had rather be a doorkeeper in the house of my God," the word is not used in its technical sense. the Revised Version, margin gives "stand (the King James Version margin "sit") at the threshold," to an eastern mind a situation of deep humility (compare title of the Ps and 1Ch 9:19).

In the New Testament the order of temple doorkeepers is not referred to. But a doorkeeper (thuroros) is mentioned in connection with a private house (Mr 13:34), with the high priest’s house (Joh 18:16,17), and with sheep-folds (Joh 10:3), a maid serving as doorkeeper in some cases (Ac 12:13).