Identification Protocol daemon
is a server which implements the Identification
Protocol as specified in RFC 1413.
identd operates by looking up specific
TCP/IP connections and returning the name of the user running the process
responsible for the connection.
The options are as follows:
M. St. Johns,
Identification Protocol, RFC
1413, February 1993.
identd to use IPv4 addresses only.
identd to use IPv6 addresses only.
- Do not daemonize. If this option is specified,
identd will run in the foreground and log to
- Always return “UNKNOWN-ERROR” instead of the
“NO-USER” or “INVALID-PORT” errors.
- Hide information about existing and non-existent users. This flag implies
- Hide the actual information about the user by providing an opaque token
instead. This token is entered into the local system logs so that the
administrator can later discover who the real user was.
- Listen on the specified address. By default
listens on wildcard addresses.
- When replying with a user name or ID, first check for a file
.noident in the user's home directory. If this
file is accessible, return “HIDDEN-USER” instead of the
normal USERID response.
- Always return UID numbers instead of usernames.
- Specifies the idle timeout for client connections, in seconds. The default
timeout is 120 seconds.
identd command was originally a process run via
inetd(8). It was rewritten for
OpenBSD 5.4 as a persistent non-blocking daemon.