.TH IPSERV 8
.SH NAME
telnetd, rlogind, rexexec, ftpd, imap4d \- Internet remote access daemons
.SH SYNOPSIS
.PP
.B ip/telnetd
.RB [ -adnpt ]
.RB [ -u
.IR user ]
.PP
.B ip/rlogind
.PP
.B ip/rexexec
.RB [ -a ]
.PP
.B ip/ftpd
.RB [ -adp ]
.RB [ -n
.IR namepace-file ]
.PP
.B ip/imap4d
.RB [ -ap ]
.RB [ -d
.IR smtpdomain ]
.RB [ -s
.IR servername ]
.PP
.SH DESCRIPTION
These programs support remote access across the Internet.  All expect the
network connection to be standard input, output, and error.  They are normally
started from scripts in
.B /rc/bin/service
(see
.IR listen (8)).
.PP
.I Telnetd
allows login from a remote client.
There are three types of login:
.TF anonymous
.TP
.I normal
Normal users log in by encrypting and returning a
challenge printed by
.IR telnetd .
The user can use either the
.IR netkey
program
(see
.IR passwd (1))
or a  SecureNet handheld authenticator to encrypt the challenge.
.B /lib/namespace
defines the namespace.
.TP
.I noworld
Users in group
.B noworld
in
.BR /adm/users 
authenticate with a password in the clear.
.B /lib/namespace.noworld
defines the namespace.
.TP
.I anonymous
User
.B none
requires no authentication.
.B /lib/namespace 
defines the namespace.
.PD
.PP
The options are:
.TP
.B a
allow anonymous login by
.B none
.TP
.B d
print debugging to standard error
.TP
.B p
don't originate any telnet control codes
.TP
.B n
turn on local character echoing and imply the
.B p
option
.TP
.B t
trusted, that is, don't authenticate
.TP
.B u
use
.I user
as the local account name
.PD
.PP
.I Rlogind
logs in using the BSD remote login protocol.
.I Rlogind
execs
.I telnetd
.B -nu
after completing its initial handshake.
.PP
.I Rexexec
executes a command locally for a remote client.  It uses the
standard Plan 9 authentication (see
.IR auth (6)).
Its only option:
.TP
.BR a
allow anonymous access by
.BR none .
.PD
.PP
.I Ftpd
runs the Internet file transfer protocol.  Users may transfer
files in either direction between the local and
remote machines.
As for
.IR telnetd ,
there are three types of login:
.TF anonymous
.TP
.I normal
Normal users authenticate
via the same challenge/response as for
.IR telnetd .
.BI /usr/ username /lib/namespace.ftp
or, if that file does not exist,
.B /lib/namespace
defines the namespace.
.TP
.I noworld
Users in group
.B noworld
in
.B /adm/users
login using a password in the clear.
.B /lib/namespace.noworld
defines the namespace.
.TP
.I anonymous
Users
.B anonymous
and
.B none
require no authentication.
The argument to the
.B \-n
option (default
.IR /lib/namespace.ftp )
defines the namespace.
Anonymous users may only store files in the subtree
below
.BR /incoming .
.PD
.PP
The options are:
.TP
.B a
allow anonymous access
.TP
.B n
the namespace for anonymous users (default
.BR /lib/namespace.ftp )
.TP
.B d
write debugging output to standard error
.PP
.I Imap4d
provides access to a user's mailboxes via the IMAP4rev1 protocol.
Only files rooted in
.BI /mail/box/ username /
are accessible.
The list of subscribed mailboxes is contained in
.BI /mail/box/ username /imap.subscribed ,
and initially contains only
.BR INBOX ,
IMAP's name for the user's mailbox.
A shadow file,
.IB mailbox .imp ,
is created for each mailbox examined.
.PP
The options are:
.TP
.B a
Assume the user is already authenticated.
By default, the user must authenticate using
CRAM-MD5 or
.IR securenet (8)
challenge/response authentication.
.TP
.B p
Allow login authentication.  This option
should only be enabled for servers using
an encrypted connection, such as SSL,
and when enabled, all non-encrypted connections should be disallowed.
.I Imap4d
does not enforce this policy.
.TP
.B s
The server's name.
If none is provided,
.B cs
(see
.IR ndb (8))
is queried or
.B /env/sysname
is used.
.TP
.B d
The local mail domain.
Defaults to the server
.B /env/site
in the mail server's domain.
.SH FILES
.B /lib/namepace
.br
.BI /usr/ username /lib/namespace.ftp
.br
.B /lib/namespace.world
.br
.B /lib/namespace.ftp
.br
.BI /mail/box/ username / mailbox
.br
.BI /mail/box/ username / mailbox .imp
.br
.BI /mail/box/ username /imap.subscribed
.SH SOURCE
.B /sys/src/cmd/ip/telnetd.c
.br
.B /sys/src/cmd/ip/rlogind.c
.br
.B /sys/src/cmd/ip/rexexec.c
.br
.B /sys/src/cmd/ip/ftpd.c
.br
.B /sys/src/cmd/ip/imap4d/
.br
.SH "SEE ALSO"
.IR ftpfs (4)