Similar to プロキシ

Persona non grata

Mole (espionage)

Alfred Redl

Server (computing)

Archie (search engine)

BIND

Dbndns

Djbdns

FTPmail

IRCd

Service wrapper

Kea (software)

Linux Terminal Server Project

Memcached

XDarwin

Application server

Web container

Web server

Virtual private server

Client–server model

Game server