telnetd, rlogind, rexexec, ftpd - Internet remote access daemons ip/telnetd [ -adnptN ] [ -u user ]

ip/rlogind

ip/rexexec

ip/ftpd [ -aAde ] [ -n namepace-file ]

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 /rc/bin/service (see listen (8)).

Telnetd allows login from a remote client. There are three types of login: .TF anonymo

normal Normal users log in by encrypting and returning a challenge printed by telnetd . The user can use either the netkey program (see passwd (1)) or a SecureNet handheld authenticator to encrypt the challenge. /lib/namespace defines the namespace.

noworld Users in group noworld in /adm/users authenticate with a password in the clear. /lib/namespace.noworld defines the namespace.

anonymous User none requires no authentication. /lib/namespace defines the namespace.

Telnetd 's options are:

4 a allow anonymous login by none

d print debugging to standard error

p don't originate any telnet control codes

n turn on local character echoing and imply the p option

t trusted, that is, don't authenticate

u use user as the local account name

N permit connections by `noworld' users only.

Rlogind logs in using the BSD remote login protocol. Rlogind execs telnetd -nu after completing its initial handshake.

Rexexec executes a command locally for a remote client. It uses the standard Plan 9 authentication (see authsrv (6)).

Ftpd runs the Internet file transfer protocol. Users may transfer files in either direction between the local and remote machines. As for telnetd , there are three types of login: .TF anonymo

normal Normal users authenticate via the same challenge/response as for telnetd . /usr/ username /lib/namespace.ftp or, if that file does not exist, /lib/namespace defines the namespace.

noworld Users in group noworld in /adm/users login using a password in the clear. /lib/namespace.noworld defines the namespace.

anonymous Users anonymous and none require no authentication. The argument to the -n option (default /lib/namespace.ftp ) defines the namespace. Anonymous users may only store files in the subtree below /incoming .

Ftpd 's options are:

4 a allow anonymous access

A allow only anonymous access

d write debugging output to standard error

e treat any user as anonymous

n the namespace for anonymous users (default /lib/namespace.ftp )

To preserve intended protections in shared file trees, any directory containing a file .httplogin is locked by ftpd; see httpd (8).

/lib/namepace

/usr/ username /lib/namespace.ftp

/lib/namespace.world

/lib/namespace.ftp

/sys/src/cmd/ip/telnetd.c

/sys/src/cmd/ip/rlogind.c

/sys/src/cmd/ip/rexexec.c

/sys/src/cmd/ip/ftpd.c

ftpfs (4), pop3 (8)