RLOGIND(8)

NAME

rlogind − remote log-in server

USAGE

/etc/rlogind [ −d ]

DESCRIPTION

Rlogind is the server for the rlogin(1) program. The server allows remote log-in to a system, with authentication based on privileged port numbers.

Rlogind listens for service requests at the port indicated in the “log-in” service specification. When a service request is received, the following protocol is initiated:

1)The server checks the client’s source port. If the port number is not in the range 0-1023, the server aborts the connection.

2)The server checks the client’s source address. If the address is associated with a host for which no corresponding entry exists in the host name data base (see hosts(5)), the server aborts the connection.

Once the source port and address have been checked, rlogind allocates a pseudo terminal, and manipulates file descriptors so that the slave half of the pseudo terminal becomes the stdin , stdout , and stderr for a log-in process. The log-in process is an instance of the login(1) program, invoked with the −r option. The log-in process then authenticates the user as described in rshd(8), but if automatic authentication fails, rlogind presents the standard log-in message, as if the user were attempting to log in to a standard terminal line.

The parent of the log-in process manipulates the master side of the pseduo terminal and operates as an intermediary between the log-in process and the client of the rlogin program. In normal operation, the packet protocol provides ^S/^Q type facilities and propagates interrupt signals to the remote programs. The log-in process propagates the client terminal’s baud rate and terminal type, as found in the environment variable, “TERM”.

NOTES

The authentication procedure used here assumes the integrity of each client machine and the connecting medium.

DIAGNOSTICS

All diagnostic messages are returned on the connection associated with the stderr, after which any network connections are closed. An error is indicated by a leading byte with a value of 1.

Hostname for your address unknown.
No entry in the host name database exists for the client’s machine.

Try again.
A fork by the server failed.